[Federal Register Volume 84, Number 100 (Thursday, May 23, 2019)]
[Rules and Regulations]
[Pages 23703-23710]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2019-10748]



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 Rules and Regulations
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  Federal Register / Vol. 84, No. 100 / Thursday, May 23, 2019 / Rules 
and Regulations  

[[Page 23703]]



DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2018-0790; Product Identifier 2018-NM-078-AD; Amendment 
39-19629; AD 2019-08-08]
RIN 2120-AA64


Airworthiness Directives; Bombardier, Inc., Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Final rule.

-----------------------------------------------------------------------

SUMMARY: We are superseding Airworthiness Directive (AD) 2010-14-05, 
which applied to certain Bombardier, Inc., Model CL-600-1A11 (600), CL-
600-2A12 (601), and CL-600-2B16 (601-3A, 601-3R, and 604 Variants) 
airplanes. AD 2010-14-05 required inspection for the part numbers of 
the system and brake accumulators, and repetitive replacement of 
affected accumulators. This AD adds requirements for relocating the 
accumulators and revising the existing maintenance or inspection 
program to incorporate new or more restrictive airworthiness 
limitations. This AD also adds optional terminating action for certain 
airplanes. This AD was prompted by reports of on-ground hydraulic 
accumulator screw cap or end cap failure that resulted in the loss of 
the associated hydraulic system and high-energy impact damage to 
adjacent systems and structure. We are issuing this AD to address the 
unsafe condition on these products.

DATES: This AD is effective June 27, 2019.
    The Director of the Federal Register approved the incorporation by 
reference of certain publications listed in this AD as of June 27, 
2019.

ADDRESSES: For service information identified in this final rule, 
contact Bombardier, Inc., 200 C[ocirc]te-Vertu Road West, Dorval, 
Qu[eacute]bec H4S 2A3, Canada; North America toll-free telephone 1-866-
538-1247 or direct-dial telephone 1-514-855-2999; email 
[email protected]; internet http://www.bombardier.com. You may 
view this service information at the FAA, Transport Standards Branch, 
2200 South 216th St., Des Moines, WA. For information on the 
availability of this material at the FAA, call 206-231-3195. It is also 
available on the internet at http://www.regulations.gov by searching 
for and locating Docket No. FAA-2018-0790.

Examining the AD Docket

    You may examine the AD docket on the internet at http://www.regulations.gov by searching for and locating Docket No. FAA-2018-
0790; or in person at Docket Operations between 9 a.m. and 5 p.m., 
Monday through Friday, except Federal holidays. The AD docket contains 
this final rule, the regulatory evaluation, any comments received, and 
other information. The address for Docket Operations (phone: 800-647-
5527) is U.S. Department of Transportation, Docket Operations, M-30, 
West Building Ground Floor, Room W12-140, 1200 New Jersey Avenue SE, 
Washington, DC 20590.

FOR FURTHER INFORMATION CONTACT: Darren Gassetto, Aerospace Engineer, 
Mechanical Systems & Administrative Services, FAA, New York ACO Branch, 
1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516-228-
7323; fax 516-794-5531; email [email protected].

SUPPLEMENTARY INFORMATION: 

Discussion

    We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR 
part 39 to supersede AD 2010-14-05, Amendment 39-16350 (75 FR 37994, 
July 1, 2010) (``AD 2010-14-05''). AD 2010-14-05 applied to certain 
Bombardier, Inc., Model CL-600-1A11 (600), CL-600-2A12 (601), and CL-
600-2B16 (601-3A, 601-3R, and 604 Variants) airplanes. The NPRM 
published in the Federal Register on September 14, 2018 (83 FR 46670). 
The NPRM was prompted by reports of on-ground hydraulic accumulator 
screw cap or end cap failure that resulted in the loss of the 
associated hydraulic system and high-energy impact damage to adjacent 
systems and structure. The NPRM proposed to continue to require 
inspection for the part numbers of the system and brake accumulators, 
and repetitive replacement of affected accumulators. The NPRM also 
proposed to require relocating the accumulators and revising the 
existing maintenance or inspection program to incorporate new or more 
restrictive airworthiness limitations. The NPRM also proposed to add 
optional terminating action for certain airplanes. We are issuing this 
AD to address failure of one of the brake accumulator screw caps/end 
caps, which could result in impact damage causing loss of both 
hydraulic systems No. 2 and No. 3, and the consequent loss of both 
braking and nose wheel steering, the potential for a runway excursion, 
and damage to the airplane.
    Transport Canada Civil Aviation (TCCA), which is the aviation 
authority for Canada, has issued Canadian AD CF-2009-39R1, dated 
October 13, 2017 (referred to after this as the Mandatory Continuing 
Airworthiness Information, or ``the MCAI''), to correct an unsafe 
condition for certain Bombardier, Inc., Model CL-600-1A11 (600), CL-
600-2A12 (601), and CL-600-2B16 (601-3A, 601-3R, and 604 Variants) 
airplanes. The MCAI states:

    Seven cases of on-ground hydraulic accumulator screw cap or end 
cap failure have been experienced on CL-600-2B19 (CRJ) aircraft, 
resulting in loss of the associated hydraulic system and high-energy 
impact damage to adjacent systems and structure. The lowest number 
of flight cycles accumulated at the time of failure, to date, has 
been 6991 flight cycles.
    Although there have been no failures to date on any CL-600-1A11, 
CL-600-2A12 or CL-600-2B16 aircraft, the same accumulators as those 
installed on the CL-600-2B19, Part Numbers (P/N) 08-60163-002 and 
08-60164-002 are installed on some of the aircraft listed in the 
Applicability section of this directive.
    Notes:
    1. Earlier accumulators, P/Ns 2770571-102, 2770571-103, 2770571-
104 and 2770571-105, were installed in production on the following 
aircraft: CL-600-1A11 [all Serial Numbers (S/Ns)], CL-600-2A12 (all 
S/Ns) and CL-600-2B16 (S/Ns 5001 through 5194 and 5301 through 5524 
only). These accumulators do not require inspection or replacement. 
However, if any of the accumulators with the above P/Ns have been 
replaced in-service by P/Ns 08-60163-002 and 08-60164-002, these 
latter accumulators require replacement.

[[Page 23704]]

    2. Prior to issuance of [Canadian] AD CF-2009-39, the only 
accumulators ever installed in production on CL-600-2B16 aircraft, 
S/Ns 5525 through 5665 and 5701 through 5908, are P/Ns 08-60163-002 
and 08-60164-002; these accumulators require replacement.
    3. After issuance of [Canadian] AD CF-2009-39 [which corresponds 
to FAA AD 2010-14-05], accumulators with P/Ns specified in Note 2, 
above, began to feature various S/N suffixes. Only accumulators with 
S/N suffix ``TNAE'' do not require replacement, but they are subject 
to other mandatory actions detailed in this AD.
    4. Stainless steel accumulators P/Ns 601R75139-3 (11094-4) and 
601R75139-1 (11093-4) were installed in production on CL-600-2B16 
aircraft, S/Ns 5909 and subsequent. These accumulators do not 
require replacement, but they are subjected to other mandatory 
actions detailed in this AD.
    A detailed analysis of the systems and structure in the 
potential line of trajectory of a failed screw cap/end cap for each 
accumulator, P/Ns 08-60163-002 and 08-60164-002, has been conducted. 
On the Challengers, it has been identified that the worst case 
scenario would be a failure of system No. 1, 2 or 3 accumulator 
screw caps/end caps (depending on the model), resulting in a 
potential uncontrolled fire in a non-designated fire zone.
    The original version of this [Canadian] AD gave instructions to 
perform identification and records checks, where applicable, and 
replace accumulators, P/Ns 08-60163-002 and 08-60164-002 within the 
time compliance specified.
* * * * *
    You may examine the MCAI in the AD docket on the internet at http://www.regulations.gov by searching for and locating Docket No. FAA-2018-
0790.

Comments

    We gave the public the opportunity to participate in developing 
this AD. The following presents the comments received on the NPRM and 
the FAA's response to each comment.

Request To Refer to Latest Service Information

    Bombardier requested that we refer to the latest version of the 
service information: Bombardier Challenger CL-605 Time Limits/
Maintenance Checks (TLMC), Revision 19, dated May 29, 2018.
    We agree to refer to the latest service information. The specific 
tasks required by paragraph (j) of this AD have not changed in the 
latest available service information. The current version of the 
Bombardier Challenger CL-605 Time Limits/Maintenance Checks, Part 2, 
Airworthiness Limitations, is Revision 20, dated November 19, 2018. We 
have changed all references accordingly in this final rule, with credit 
provided in paragraph (l)(6) of this AD for the prior accomplishment of 
Revision 18, dated December 4, 2017, and Revision 19, dated May 29, 
2018.
    The current version of the Bombardier Challenger CL-604 Time 
Limits/Maintenance Checks, Part 2, Airworthiness Limitations, is 
Revision 31, dated November 19, 2018. We have changed all references 
accordingly in this final rule, with credit provided in paragraph 
(l)(5) of this AD for the prior accomplishment of Revision 30, dated 
December 4, 2017.

Request for Minor Editorial Changes

    Bombardier requested several minor changes to the NPRM, including 
correcting a typographical error in an email address, updating the 
address for Bombardier, updating the airplane identity to match the 
models and variants as listed on the current type certificate data 
sheet (TCDS), and clarifying part numbers and service bulletin numbers. 
We agree and have revised this AD accordingly.

Request To Revise Model Callout

    Bombardier asked us to change ``604 Variants'' to ``604 Variant'' 
in the SUMMARY and ``Actions Since AD 2010-14-05 Was Issued'' section 
of the NPRM.
    We disagree with this request because there are multiple variants 
for the CL-600-2B16 airplanes. We have not changed this final rule 
regarding this issue.

Comment Regarding TLMC Revision Status

    Bombardier noted that the TLMC revisions listed in figure 2 to 
paragraph (j) of this AD are the latest versions published on the 
customer website and not when the tasks were introduced. No change was 
requested or made.

Request To Clarify Applicability

    Bombardier requested that we revise the applicability for Model CL-
600-2B16 airplanes in paragraph (c)(5) of the proposed AD by changing 
serial numbers ``5701 and subsequent'' to ``5701 through 5988.''
    We agree to make this change. We have determined that production 
for this model ended with serial number 5988; therefore, there is no 
change to the affected airplanes in this AD.

Request To Revise Certain Airplanes Subject to Accumulator Relocation

    Bombardier requested that we revise the affected airplanes 
identified in paragraph (i)(4) of the proposed AD, from ``S/Ns 5701 and 
subsequent'' to ``S/Ns 5701 to 5982.''
    We agree with the request. We have determined that accumulators on 
airplanes with serial numbers after 5982 have been relocated. We have 
revised paragraph (i)(4) of this AD accordingly.

Conclusion

    We reviewed the relevant data, considered the comments received, 
and determined that air safety and the public interest require adopting 
this AD with the changes described previously, and minor editorial 
changes. We have determined that these minor changes:
     Are consistent with the intent that was proposed in the 
NPRM for addressing the unsafe condition; and
     Do not add any additional burden upon the public than was 
already proposed in the NPRM.
    We also determined that these changes will not increase the 
economic burden on any operator or increase the scope of this AD.

Related Service Information Under 1 CFR Part 51

    The following Bombardier service information describes procedures 
for replacing hydraulic system accumulators with new, overhauled, or 
refurbished accumulators. These documents are distinct since they apply 
to different airplane models.
     Service Bulletin 600-0742, Revision 04, dated June 11, 
2015.
     Service Bulletin 601-0597, Revision 04, dated June 11, 
2015.
     Service Bulletin 604-29-008, Revision 04, dated June 11, 
2015.
     Service Bulletin 605-29-001, Revision 04, dated June 10, 
2015.
    The following Bombardier service information describes procedures 
for relocating hydraulic system accumulators. These documents are 
distinct since they apply to different airplane models in different 
configurations.
     Service Bulletin 600-0764, dated October 8, 2015.
     Service Bulletin 600-0767, dated August 25, 2016.
     Service Bulletin 601-0633, dated October 8, 2015.
     Service Bulletin 601-0637, dated August 25, 2016.
     Service Bulletin 604-29-013, Revision 02, dated April 18, 
2016.
     Service Bulletin 605-29-006, Revision 02, dated April 19, 
2016.
    The following Bombardier Time Limits/Maintenance Checks describe 
certain systems life limits of the safe life items. These documents are 
distinct since they apply to different airplane models in different 
configurations.
     Section 5-10-20, Time Limits (Systems), of the Bombardier 
Challenger 600 Time Limits/Maintenance Checks, PSP 605, Revision 39, 
dated January 8, 2018.

[[Page 23705]]

     Section 5-10-20, Time Limits (Systems), of the Bombardier 
Challenger 601 Time Limits/Maintenance Checks, PSP 601-5, Revision 46, 
dated January 8, 2018.
     Section 5-10-20, Time Limits (Systems), of the Bombardier 
Challenger 601 Time Limits/Maintenance Checks, PSP 601A-5, Revision 42, 
dated January 8, 2018.
     Section 5-10-11, Life Limits (Systems), of the Bombardier 
Challenger CL-604 Time Limits/Maintenance Checks, Part 2, Airworthiness 
Limitations, Revision 31, dated November 19, 2018.
     Section 5-10-11, Life Limits (Systems), of the Bombardier 
Challenger CL-605 Time Limits/Maintenance Checks, Part 2, Airworthiness 
Limitations, Revision 20, dated November 19, 2018.
    This service information is reasonably available because the 
interested parties have access to it through their normal course of 
business or by the means identified in the ADDRESSES section.

Costs of Compliance

    We estimate that this AD affects 130 airplanes of U.S. registry. We 
estimate the following costs to comply with this AD:

                                      Estimated Costs for Required Actions
----------------------------------------------------------------------------------------------------------------
           Labor cost                  Parts cost        Cost per product          Cost on U.S. operators
----------------------------------------------------------------------------------------------------------------
Retained actions: 20 work-hours   $7,717.............  $9,417.............  $1,224,210.
 x $85 per hour = $1,700.
New actions: Up to 170 work-      Up to $41,635......  Up to $56,085......  Up to $7,291,050.
 hours x $85 per hour = Up to
 $14,450.
----------------------------------------------------------------------------------------------------------------

    For the new maintenance/inspection program revision, we have 
determined that this action takes an average of 90 work-hours per 
operator, although we recognize that this number may vary from operator 
to operator. In the past, we have estimated that this action takes 1 
work-hour per airplane. Since operators incorporate maintenance or 
inspection program changes for their affected fleet, we have determined 
that a per-operator estimate is more accurate than a per-airplane 
estimate. Therefore, we estimate the total cost per operator to be 
$7,650 (90 work-hours x $85 per work-hour).
    According to the manufacturer, some or all of the costs of this AD 
may be covered under warranty, thereby reducing the cost impact on 
affected individuals. We do not control warranty coverage for affected 
individuals. As a result, we have included all known costs in our cost 
estimate.

Authority for This Rulemaking

    Title 49 of the United States Code specifies the FAA's authority to 
issue rules on aviation safety. Subtitle I, Section 106, describes the 
authority of the FAA Administrator. Subtitle VII, Aviation Programs, 
describes in more detail the scope of the Agency's authority.
    We are issuing this rulemaking under the authority described in 
Subtitle VII, Part A, Subpart III, Section 44701, ``General 
requirements.'' Under that section, Congress charges the FAA with 
promoting safe flight of civil aircraft in air commerce by prescribing 
regulations for practices, methods, and procedures the Administrator 
finds necessary for safety in air commerce. This regulation is within 
the scope of that authority because it addresses an unsafe condition 
that is likely to exist or develop on products identified in this 
rulemaking action.
    This AD is issued in accordance with authority delegated by the 
Executive Director, Aircraft Certification Service, as authorized by 
FAA Order 8000.51C. In accordance with that order, issuance of ADs is 
normally a function of the Compliance and Airworthiness Division, but 
during this transition period, the Executive Director has delegated the 
authority to issue ADs applicable to transport category airplanes and 
associated appliances to the Director of the System Oversight Division.

Regulatory Findings

    We have determined that this AD will not have federalism 
implications under Executive Order 13132. This AD will not have a 
substantial direct effect on the States, on the relationship between 
the national government and the States, or on the distribution of power 
and responsibilities among the various levels of government.
    For the reasons discussed above, I certify that this AD:
    (1) Is not a ``significant regulatory action'' under Executive 
Order 12866,
    (2) Is not a ``significant rule'' under DOT Regulatory Policies and 
Procedures (44 FR 11034, February 26, 1979),
    (3) Will not affect intrastate aviation in Alaska, and
    (4) Will not have a significant economic impact, positive or 
negative, on a substantial number of small entities under the criteria 
of the Regulatory Flexibility Act.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Incorporation by 
reference, Safety.

Adoption of the Amendment

    Accordingly, under the authority delegated to me by the 
Administrator, the FAA amends 14 CFR part 39 as follows:

PART 39--AIRWORTHINESS DIRECTIVES

0
1. The authority citation for part 39 continues to read as follows:

    Authority:  49 U.S.C. 106(g), 40113, 44701.


Sec.  39.13  [Amended]

0
2. The FAA amends Sec.  39.13 by removing Airworthiness Directive (AD) 
2010-14-05, Amendment 39-16350 (75 FR 37994, July 1, 2010), and adding 
the following new AD:

2019-08-08 Bombardier, Inc.: Amendment 39-19629; Docket No. FAA-
2018-0790; Product Identifier 2018-NM-078-AD.

(a) Effective Date

    This AD is effective June 27, 2019.

(b) Affected ADs

    This AD replaces AD 2010-14-05, Amendment 39-16350 (75 FR 37994, 
July 1, 2010) (``AD 2010-14-05'').

(c) Applicability

    This AD applies to the Bombardier, Inc., airplanes, certificated 
in any category, identified in paragraphs (c)(1) through (c)(5) of 
this AD.
    (1) Model CL-600-1A11 (600) airplanes, serial numbers 1004 
through 1085 inclusive.
    (2) Model CL-600-2A12 (601) airplanes, serial numbers 3001 
through 3066 inclusive.
    (3) Model CL-600-2B16 airplanes (601-3A Variant), serial numbers 
5001 through 5134 inclusive.
    (4) Model CL-600-2B16 airplanes (601-3R Variant), serial numbers 
5135 through 5194 inclusive.
    (5) Model CL-600-2B16 airplanes (604 Variant), serial numbers 
5301 through 5665 inclusive and 5701 through 5988 inclusive.

    Note 1 to paragraph (c) of this AD:  Certain Model CL-600-2B16 
(604 Variant) airplanes

[[Page 23706]]

might be referred to by the marketing designation CL-605.

(d) Subject

    Air Transport Association (ATA) of America Code 29, Hydraulic 
power.

(e) Reason

    This AD was prompted by reports of on-ground hydraulic 
accumulator screw cap or end cap failure that resulted in the loss 
of the associated hydraulic system and high-energy impact damage to 
adjacent systems and structure. We are issuing this AD to address 
failure of one of the brake accumulator screw caps/end caps, which 
could result in impact damage causing loss of both hydraulic systems 
No. 2 and No. 3, and the consequent loss of both braking and nose 
wheel steering, the potential for a runway excursion, and damage to 
the airplane.

(f) Compliance

    Comply with this AD within the compliance times specified, 
unless already done.

(g) Retained Part Number Inspection and Accumulator Replacement, With 
Revised Formatting, Service Information, and Affected Part Numbers

    This paragraph restates the requirements of paragraph (g) of AD 
2010-14-05, with revised formatting, service information, and 
affected part numbers. Do the following actions as applicable.
    (1) Within 50 flight hours after August 5, 2010 (the effective 
date of AD 2010-14-05), inspect to determine the part numbers of the 
system accumulators numbers 1, 2, and 3, and brake accumulators 
numbers 2 and 3 that are installed on the airplane. A review of 
airplane maintenance records is acceptable in lieu of this 
inspection if the part number of each accumulator can be 
conclusively determined from that review. If all of the installed 
accumulators have part number (P/N) 2770571-102, 2770571-103, 
2770571-104, 2770571-105, 601R75139-3 (11094-4), or 601R75139-1 
(11093-4), no further action is required by paragraph (g) of this 
AD.
    (2) Except as provided in paragraph (g)(1) of this AD: At the 
applicable time in paragraph (g)(2)(i), (g)(2)(ii), or (g)(2)(iii) 
of this AD, replace the accumulator with a new, overhauled, or 
refurbished accumulator with the same part number, in accordance 
with the Accomplishment Instructions of the applicable service 
bulletin listed in figure 1 to paragraphs (g)(2) and (g)(3) of this 
AD.
    (i) For each accumulator having P/Ns 08-60163-002 (601R75138-1), 
and 08-60164-002 (601R75138-3), as applicable, that has accumulated 
more than 3,650 total flight cycles as of August 5, 2010 (the 
effective date of AD 2010-14-05): Replace the accumulator within 100 
flight cycles after August 5, 2010.
    (ii) For each accumulator having P/N 08-60163-002 (601R75138-1), 
and 08-60164-002 (601R75138-3), as applicable, that has accumulated 
3,650 total flight cycles or fewer as of August 5, 2010: Replace the 
accumulator before the accumulation of 3,750 total flight cycles on 
the accumulator.
    (iii) For each accumulator having P/N 08-60163-002 (601R75138-
1), and 08-60164-002 (601R75138-3), as applicable, for which it is 
not possible to determine the number of flight cycles accumulated: 
Replace the accumulator within 100 flight cycles after August 5, 
2010.
[GRAPHIC] [TIFF OMITTED] TR23MY19.001

    (3) Thereafter, before the accumulation of 3,750 total flight 
cycles on any accumulator having P/Ns 08-60163-002 (601R75138-1), 
and 08-60164-002 (601R75138-3), as applicable, replace the 
accumulator with a new, overhauled, or refurbished accumulator 
having the same part number, in accordance with the Accomplishment 
Instructions of the applicable service bulletin listed in figure 1 
to paragraphs (g)(2) and (g)(3) of this AD.

(h) New Provision of This AD: Terminating Action for Certain 
Accumulators

    For each accumulator with one of the part number and serial 
number (S/N) suffixes listed in paragraphs (h)(1) through (h)(4) of 
this AD, the repetitive replacement specified in paragraphs (g)(2) 
and (g)(3) of this AD is not required.
    (1) P/N 08-60163-002 with S/N suffix TNAE.
    (2) P/N 08-60164-002 with S/N suffix TNAE.
    (3) P/N 601R75139-3 (11094-4).
    (4) P/N 601R75139-1 (11093-4).

(i) New Requirement of This AD: Relocation of Accumulators

    Within 60 months or 2,400 flight cycles, whichever occurs first 
after the effective date of this AD, relocate the hydraulic system 
accumulators as specified in paragraphs (i)(1) through (i)(4) of 
this AD, as applicable. Relocation of the hydraulic system 
accumulators as required by this paragraph does not terminate any 
repetitive replacement required by paragraph (g)(2) or (g)(3) of 
this AD.
    (1) For Model CL-600-1A11 (600) airplanes, S/Ns 1004 through 
1085 inclusive: Relocate accumulators as specified in paragraphs 
(i)(1)(i) and (i)(1)(ii) of this AD.
    (i) Relocate hydraulic system Nos. 1 and 2 accumulators, in 
accordance with the Accomplishment Instructions of Bombardier 
Service Bulletin 600-0764, dated October 8, 2015.
    (ii) Relocate hydraulic system No. 3 accumulator, in accordance 
with the Accomplishment Instructions of Bombardier Service Bulletin 
600-0767, dated August 25, 2016.
    (2) For Model CL-600-2A12 (601) airplanes, S/Ns 3001 through 
3066 inclusive, and Model CL-600-2B16 (601-3A and 601-3R Variants) 
airplanes, S/Ns 5001 through 5194 inclusive: Relocate accumulators 
as specified in paragraphs (i)(2)(i) and (i)(2)(ii) of this AD.
    (i) Relocate hydraulic system Nos. 1 and 2 accumulators, in 
accordance with the Accomplishment Instructions of Bombardier 
Service Bulletin 601-0633, dated October 8, 2015.

[[Page 23707]]

    (ii) Relocate hydraulic system No. 3 accumulator, in accordance 
with the Accomplishment Instructions of Bombardier Service Bulletin 
601-0637, dated August 25, 2016.
    (3) For Model CL-600-2B16 (604 Variant) airplanes, S/Ns 5301 
through 5665 inclusive: Relocate hydraulic system No. 3 accumulator, 
in accordance with the Accomplishment Instructions of Bombardier 
Service Bulletin 604-29-013, Revision 02, dated April 18, 2016.
    (4) For Model CL-600-2B16 (605) airplanes, S/Ns 5701 through 
5982 inclusive and subsequent (i.e., Model CL-600-2B16 (604 
Variant), referred to by the marketing designation CL-605): Relocate 
hydraulic system No. 3 accumulator, in accordance with the 
Accomplishment Instructions of Bombardier Service Bulletin 605-29-
006, Revision 02, dated April 19, 2016.

(j) New Requirement of This AD: Revision of Maintenance/Inspection 
Program

    Within 50 flight hours after the effective date of this AD, 
revise the maintenance or inspection program, as applicable, to 
incorporate the tasks specified in figure 2 to paragraph (j) of this 
AD.
BILLING CODE 4910-13-P
[GRAPHIC] [TIFF OMITTED] TR23MY19.002


[[Page 23708]]


[GRAPHIC] [TIFF OMITTED] TR23MY19.003

BILLING CODE 4910-13-C

(k) No Alternative Actions or Intervals

    After the maintenance or inspection program has been revised as 
required by paragraph (j) of this AD, no alternative actions (e.g., 
inspections) or intervals may be used unless the actions or 
intervals are approved as an alternative method of compliance (AMOC) 
in accordance with the procedures specified in paragraph (n)(1) of 
this AD.

(l) Credit for Previous Actions

    (1) Replacement of an accumulator with a new accumulator having 
the same part number is also acceptable for compliance with the 
requirements of paragraphs (g)(2) and (g)(3) of this AD, if done 
before August 5, 2010 (the effective date of AD 2010-14-05), in 
accordance with the applicable service bulletin listed in figure 3 
to paragraph (l)(1) of this AD. This service information is not 
incorporated by reference in this AD.
BILLING CODE 4910-13-P

[[Page 23709]]

[GRAPHIC] [TIFF OMITTED] TR23MY19.004

    (2) Replacement of an accumulator with a new accumulator having 
the same part number is also acceptable for compliance with the 
requirements of paragraphs (g)(2) and (g)(3) of this AD, if done 
before the effective date of this AD in accordance with the 
applicable service bulletin listed in figure 4 to paragraph (l)(2) 
of this AD.
[GRAPHIC] [TIFF OMITTED] TR23MY19.005


[[Page 23710]]


BILLING CODE 4910-13-C
    (3) This paragraph provides credit for actions required by 
paragraph (i)(3) of this AD, if those actions were performed before 
the effective date of this AD, in accordance with Bombardier Service 
Bulletin 604-29-013, dated April 30, 2015; or Bombardier Service 
Bulletin 604-29-013, Revision 01, dated October 19, 2015. This 
service information is not incorporated by reference in this AD.
    (4) This paragraph provides credit for actions required by 
paragraph (i)(4) of this AD, if those actions were performed before 
the effective date of this AD, in accordance with Bombardier Service 
Bulletin 605-29-006, dated April 30, 2015; or Bombardier Service 
Bulletin 605-29-006, Revision 01, dated October 19, 2015. This 
service information is not incorporated by reference in this AD.
    (5) For Model CL-600-2B16 (604 Variant) airplanes: This 
paragraph provides credit for the actions required by paragraph (j) 
of this AD, if those actions were performed before the effective 
date of this AD using Section 5-10-11, Life Limits (Systems), of the 
Bombardier Challenger CL-604 Time Limits/Maintenance Checks, Part 2, 
Airworthiness Limitations, Revision 30, dated December 4, 2017. This 
service information is not incorporated by reference in this AD.
    (6) For Model CL-600-2B16 (605) airplanes: This paragraph 
provides credit for the actions required by paragraph (j) of this AD 
for, if those actions were performed before the effective date of 
this AD using Section 5-10-11, Life Limits (Systems), of the 
Bombardier Challenger CL-605 Time Limits/Maintenance Checks, Part 2, 
Airworthiness Limitations, Revision 18, dated December 4, 2017; or 
Revision 19, dated May 29, 2018. This service information is not 
incorporated by reference in this AD.

(m) Special Flight Permit

    Special flight permits may be issued in accordance with sections 
21.197 and 21.199 of the Federal Aviation Regulations (14 CFR 21.197 
and 21.199) to operate the airplane to a location where the airplane 
can be modified, provided the following conditions are met:
    (1) An engineering recommendation must be obtained via the 
Bombardier process Service Request for Product Support Action 
(SRPSA) at [email protected].
    (2) Approval of the special flight permit must be obtained from 
the Flight Standards District Office.

(n) Other FAA AD Provisions

    (1) Alternative Methods of Compliance (AMOCs): The Manager, New 
York ACO Branch, FAA, has the authority to approve AMOCs for this 
AD, if requested using the procedures found in 14 CFR 39.19. In 
accordance with 14 CFR 39.19, send your request to your principal 
inspector or local Flight Standards District Office, as appropriate. 
If sending information directly to the manager of the certification 
office, send it to ATTN: Program Manager, Continuing Operational 
Safety, FAA, New York ACO Branch.
    (i) Before using any approved AMOC, notify your appropriate 
principal inspector, or lacking a principal inspector, the manager 
of the local flight standards district office/certificate holding 
district office.
    (ii) AMOC 15-76R1 and AMOC 15-53, approved previously for AD 
2010-14-05, are approved as AMOCs for the corresponding provisions 
of paragraph (g)(2) of this AD.
    (2) Contacting the Manufacturer: For any requirement in this AD 
to obtain corrective actions from a manufacturer, the action must be 
accomplished using a method approved by the Manager, New York ACO 
Branch, FAA; or Transport Canada Civil Aviation (TCCA); or 
Bombardier's TCCA Design Approval Organization (DAO). If approved by 
the DAO, the approval must include the DAO-authorized signature.

(o) Related Information

    (1) Refer to Mandatory Continuing Airworthiness Information 
(MCAI) Canadian AD CF-2009-39R1, dated October 13, 2017, for related 
information. This MCAI may be found in the AD docket on the internet 
at http://www.regulations.gov by searching for and locating Docket 
No. FAA-2018-0790.
    (2) For more information about this AD, contact Darren Gassetto, 
Aerospace Engineer, Mechanical Systems & Administrative Services, 
FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, 
NY 11590; telephone 516-228-7323; fax 516-794-5531; email [email protected].
    (3) Service information identified in this AD that is not 
incorporated by reference is available at the addresses specified in 
paragraphs (p)(5) and (p)(6) of this AD.

(p) Material Incorporated by Reference

    (1) The Director of the Federal Register approved the 
incorporation by reference (IBR) of the service information listed 
in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51.
    (2) You must use this service information as applicable to do 
the actions required by this AD, unless the AD specifies otherwise.
    (3) The following service information was approved for IBR on 
June 27, 2019.
    (i) Bombardier Service Bulletin 600-0742, Revision 04, dated 
June 11, 2015.
    (ii) Bombardier Service Bulletin 600-0764, dated October 8, 
2015.
    (iii) Bombardier Service Bulletin 600-0767, dated August 25, 
2016.
    (iv) Bombardier Service Bulletin 601-0597, Revision 04, dated 
June 11, 2015.
    (v) Bombardier Service Bulletin 601-0633, dated October 8, 2015.
    (vi) Bombardier Service Bulletin 601-0637, dated August 25, 
2016.
    (vii) Bombardier Service Bulletin 604-29-008, Revision 04, dated 
June 11, 2015.
    (viii) Bombardier Service Bulletin 604-29-013, Revision 02, 
dated April 18, 2016.
    (ix) Bombardier Service Bulletin 605-29-001, Revision 04, dated 
June 10, 2015.
    (x) Bombardier Service Bulletin 605-29-006, Revision 02, dated 
April 19, 2016.
    (xi) Section 5-10-11, Life Limits (Systems), of the Bombardier 
Challenger CL-604 Time Limits/Maintenance Checks, Part 2, 
Airworthiness Limitations, Revision 31, dated November 19, 2018.
    (xii) Section 5-10-11, Life Limits (Systems), of the Bombardier 
Challenger CL-605 Time Limits/Maintenance Checks, Part 2, 
Airworthiness Limitations, Revision 20, dated November 19, 2018.
    (xiii) Section 5-10-20, Time Limits (Systems), of the Bombardier 
Challenger 600 Time Limits/Maintenance Checks, PSP 605, Revision 39, 
dated January 8, 2018.
    (xiv) Section 5-10-20, Time Limits (Systems), of the Bombardier 
Challenger 601 Time Limits/Maintenance Checks, PSP 601-5, Revision 
46, dated January 8, 2018.
    (xv) Section 5-10-20, Time Limits (Systems), of the Bombardier 
Challenger 601 Time Limits/Maintenance Checks, PSP 601A-5, Revision 
42, dated January 8, 2018.
    (4) For service information identified in this AD, contact 
Bombardier, Inc., 200 C[ocirc]te-Vertu Road West, Dorval, 
Qu[eacute]bec H4S 2A3, Canada; North America toll-free telephone 1-
866-538-1247 or direct-dial telephone 1-514-855-2999; email 
[email protected]; internet http://www.bombardier.com.
    (5) You may view this service information at the FAA, Transport 
Standards Branch, 2200 South 216th St., Des Moines, WA. For 
information on the availability of this material at the FAA, call 
206-231-3195.
    (6) You may view this service information that is incorporated 
by reference at the National Archives and Records Administration 
(NARA). For information on the availability of this material at 
NARA, call 202-741-6030, or go to: http://www.archives.gov/federal-register/cfr/ibr-locations.html.

    Issued in Des Moines, Washington, on April 25, 2019.
Dionne Palermo,
Acting Director, System Oversight Division, Aircraft Certification 
Service.
[FR Doc. 2019-10748 Filed 5-22-19; 8:45 am]
 BILLING CODE 4910-13-P