[Federal Register Volume 87, Number 14 (Friday, January 21, 2022)]
[Rules and Regulations]
[Pages 3184-3188]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2022-00993]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2021-0725; Project Identifier MCAI-2020-01402-T; 
Amendment 39-21882; AD 2021-26-23]
RIN 2120-AA64


Airworthiness Directives; Bombardier, Inc., Airplanes

AGENCY: Federal Aviation Administration (FAA), Department of 
Transportation (DOT).

ACTION: Final rule.

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SUMMARY: The FAA is superseding Airworthiness Directive (AD) 2017-22-
06, which applied to certain Bombardier, Inc., Model CL-600-2B16 (601-
3A, 601-3R, and 604 Variants) airplanes. AD 2017-22-06 required 
repetitive inspections for fuel leakage at the engine and auxiliary 
power unit (APU) fuel pumps, and related investigative and corrective 
actions if necessary. This AD retains the requirements of AD 2017-22-
06, and requires an inspection of the APU, repair if necessary, and 
modification of the engine electrical fuel pump (EFP) installation. 
This AD also adds airplanes to the applicability. This AD was prompted 
by reports of fuel leaks from the electrical connectors and conduits of 
the engine and APU EFP cartridge/canister, and the development of 
additional actions to address the root cause of the fuel leaks. The FAA 
is issuing this AD to address the unsafe condition on these products.

DATES: This AD is effective February 25, 2022.
    The Director of the Federal Register approved the incorporation by 
reference of certain publications listed in this AD as of February 25, 
2022.
    The Director of the Federal Register approved the incorporation by 
reference of certain other publications listed in this AD as of 
November 30, 2017 (82 FR 49498, October 26, 2017).

ADDRESSES: For service information identified in this final rule, 
contact Bombardier Business Aircraft Customer Response Center, 400 
C[ocirc]te-Vertu Road West, Dorval, Qu[eacute]bec H4S 1Y9, Canada; 
telephone 514-855-2999; email [email protected]; internet 
https://www.bombardier.com. You may view this referenced service 
information at the FAA, Airworthiness Products Section, Operational 
Safety 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 https://www.regulations.gov by 
searching for and locating Docket No. FAA-2021-0725.

Examining the AD Docket

    You may examine the AD docket on the internet at https://www.regulations.gov by searching for and locating Docket No. FAA-2021-
0725; 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, any comments received, and other information. The 
address for Docket Operations 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: Steven Dzierzynski, Aerospace 
Engineer, Avionics and Electrical Systems Section, FAA, New York ACO 
Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 
516-228-7367; fax 516-794-5531; email [email protected].

SUPPLEMENTARY INFORMATION:

Discussion

    Transport Canada Civil Aviation (TCCA), which is the aviation 
authority for Canada, has issued TCCA AD CF-2016-32R4, dated October 
13, 2020 (TCCA AD CF-2016-32R4); and TCCA AD CF-2020-38, dated October 
13, 2020 (TCCA AD CF-2020-38); (also referred to as the Mandatory 
Continuing Airworthiness Information, or the MCAI), to correct an 
unsafe condition for certain Bombardier, Inc., Model CL-600-2B16 (601-
3A, 601-3R, and 604 Variants) airplanes. You may examine the MCAI in 
the AD docket on the internet at https://www.regulations.gov by 
searching for and locating Docket No. FAA-2021-0725.
    The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 
CFR part 39 to supersede AD 2017-22-06, Amendment 39-19086 (82 FR 
49498, October 26, 2017) (AD 2017-22-06). AD 2017-22-06 applied to 
certain Bombardier, Inc., Model CL-600-2B16 (601-3A, 601-3R, and 604 
Variants) airplanes. The NPRM published in the Federal Register on 
September 8, 2021 (86 FR 50291). The NPRM was

[[Page 3185]]

prompted by reports of fuel leaks from the electrical connectors and 
conduits of the engine APU EFP cartridge/canister, and the development 
of additional actions to address the root cause of the fuel leaks. The 
NPRM proposed to retain the requirements of AD 2017-22-06, and proposed 
to require an inspection of the APU, repair if necessary, and 
modification of the engine EFP installation. The NPRM also proposed to 
add airplanes to the applicability. The FAA is issuing this AD to 
address the potential for a fire hazard as a result of fuel leak from 
the APU EFP electrical conduit in the hot landing light compartment. 
See the MCAI for additional background information.

Comments

    The FAA gave the public the opportunity to participate in 
developing this final rule. The following presents the comment received 
on the NPRM and the FAA's response to the comment.

Request To Use the Latest Service Information

    An anonymous commenter requested that the FAA revise the NPRM to 
allow the use of the latest service bulletin. The commenter stated that 
the NPRM specifies the use of Bombardier Service Bulletin 604-28-024, 
dated June 16, 2020, for the actions specified in the NPRM, and that 
the service bulletin has since been revised to Bombardier Service 
Bulletin 604-28-024, Revision 1, dated May 28, 2021.
    The FAA agrees with the commenter for the reasons provided above. 
Bombardier Service Bulletin 604-28-024, Revision 01, dated May 28, 
2021, adds a figure to clarify the location of a certain drain hole. 
The service bulletin revision does not add work or affect the technical 
content of this AD. The FAA has revised the ``Related Service 
Information under 1 CFR part 51'' paragraph and figure 2 to paragraph 
(j) of this AD accordingly. The FAA also has also added paragraph 
(m)(4) of this AD to allow credit for actions required by paragraph (j) 
of this AD if those actions were performed before the effective date of 
this AD using Bombardier Service Bulletin 604-28-024, dated June 16, 
2020.

Conclusion

    The FAA reviewed the relevant data, considered the comment 
received, and determined that air safety and the public interest 
require adopting this final rule with the change described previously 
and minor editorial changes. The FAA has 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.
    The FAA also determined that these changes will not increase the 
economic burden on any operator or increase the scope of this final 
rule.

Related Service Information Under 1 CFR Part 51

    Bombardier has issued the following service information, which 
describes procedures for repetitive general visual inspections and 
rectifications for any fuel leak from the engine and APU EFP electrical 
wiring conduit outlets. These documents are distinct since they apply 
to different airplane serial numbers.
     Bombardier Service Bulletin 604-28-022, Revision 3, dated 
August 31, 2018.
     Bombardier Service Bulletin 605-28-010, Revision 3, dated 
August 31, 2018.
     Bombardier Service Bulletin 650-28-001, Revision 3, dated 
January 3, 2019.
    Bombardier has also issued the following service information, which 
describes procedures for a detailed visual inspection of the APU for 
any damage or deformations (e.g., cut wires and a broken harness 
assembly of the fuel boost pump connector), modifying the engine EFP 
installation, and repair if necessary. These documents are distinct 
since they apply to different airplane serial numbers.
     Bombardier Service Bulletin 604-28-024, Revision 01, dated 
May 28, 2021.
     Bombardier Service Bulletin 605-28-012, dated June 16, 
2020.
     Bombardier Service Bulletin 650-28-002, dated June 16, 
2020.
    This AD also requires Bombardier Service Bulletin 604-28-022, dated 
October 19, 2015, and Bombardier Service Bulletin 605-28-010, dated 
October 19, 2015, which the Director of the Federal Register approved 
for incorporation by reference as of November 30, 2017 (82 FR 49498, 
October 26, 2017).
    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

    The FAA estimates that this AD affects 128 airplanes of U.S. 
registry.
    The FAA estimates the following costs to comply with this AD:

                                      Estimated Costs for Required Actions
----------------------------------------------------------------------------------------------------------------
                                                                                                 Cost on U.S.
              Action                    Labor cost        Parts cost      Cost per product        operators
----------------------------------------------------------------------------------------------------------------
Retained actions from AD 2017-22-  1 work-hour x $85                $0  $85 per inspection   $10,285 per
 06 (for 121 airplanes).            per hour = $85.                      cycle.               inspection cycle.
New actions......................  20 work-hours x $85           1,768  $3,468.............  $443,904.
                                    per hour = $1,700.
----------------------------------------------------------------------------------------------------------------

    The FAA estimates the following costs to do any necessary repair 
that would be required based on the results of any required actions. 
The FAA has no way of determining the number of aircraft that might 
need this repair:

                 Estimated Costs of On-Condition Actions
------------------------------------------------------------------------
                                                             Cost per
               Labor cost                   Parts cost        product
------------------------------------------------------------------------
5 work-hours x $85 per hour = $425......          $8,618          $9,043
------------------------------------------------------------------------


[[Page 3186]]

    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 operators. The FAA does not control warranty coverage for 
affected operators. As a result, the FAA has included all known costs 
in the 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.
    The FAA is 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.

Regulatory Findings

    The FAA 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) Will not affect intrastate aviation in Alaska, and
    (3) 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:
0
a. Removing Airworthiness Directive (AD) 2017-22-06, Amendment 39-19086 
(82 FR 49498, October 26, 2017); and
0
b. Adding the following new AD:

2021-21-23 Bombardier, Inc.: Amendment 39-21882; Docket No. FAA-
2021-0725; Project Identifier MCAI-2020-01402-T.

(a) Effective Date

    This airworthiness directive (AD) is effective February 25, 
2022.

(b) Affected ADs

    This AD replaces AD 2017-22-06, Amendment 39-19086 (82 FR 49498, 
October 26, 2017) (AD 2017-22-06).

(c) Applicability

    This AD applies to Bombardier, Inc., Model CL-600-2B16 (601-3A, 
601-3R, and 604 Variants) airplanes, certificated in any category, 
serial numbers 5301 through 5665 inclusive, 5701 through 5990 
inclusive, and 6050 through 6163 inclusive.

(d) Subject

    Air Transport Association (ATA) of America Code 28, Fuel.

(e) Reason

    This AD was prompted by reports of fuel leaks from the 
electrical connectors and conduits of the engine and auxiliary power 
unit (APU) electrical fuel pump (EFP) cartridge/canister, and the 
development of additional actions to address the root cause of the 
fuel leaks. The FAA is issuing this AD to address the potential for 
a fire hazard as a result of fuel leak from the APU EFP electrical 
conduit in the hot landing light compartment.

(f) Compliance

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

(g) Retained Actions for Certain Airplanes, With Revised Service 
Information and Method of Compliance Provisions

    This paragraph restates the requirements of paragraph (g) of AD 
2017-22-06, with revised service information and method of 
compliance provisions. For Model CL-600-2B16 airplanes having serial 
numbers 5301 through 5665 inclusive: Within 600 flight hours or 12 
months, whichever occurs first after November 30, 2017 (the 
effective date of AD 2017-22-06), do the inspections specified in 
paragraphs (g)(1) through (3) of this AD, and do all applicable 
corrective actions, in accordance with the Accomplishment 
Instructions of Bombardier Service Bulletin 604-28-022, dated 
October 19, 2015, or Bombardier Service Bulletin 604-28-022, 
Revision 3, dated August 31, 2018. Do all applicable corrective 
actions before further flight. Repeat the inspections at intervals 
not to exceed 600 flight hours or 12 months, whichever occurs first. 
As the effective date of this AD, use Bombardier Service Bulletin 
604-28-022, Revision 3, dated August 31, 2018, only.
    (1) Do a general visual inspection for traces of fuel coming 
from the right-hand engine boost pump at the location of the belly 
fairing screw (FS412, BL 0.0).
    (2) Do a general visual inspection for traces of fuel coming 
from the left-hand engine boost pump at the location of the belly 
fairing screw (FS412, BL 0.0).
    (3) Do a general visual inspection for traces of fuel coming 
from the EFP electrical wiring conduit outlet at the lower body 
fairing area for engine EFPs and at the right-hand landing light 
compartment for the APU EFP.

(h) Retained Actions for Certain Other Airplanes, With Revised Service 
Information and Compliance Method Provisions

    This paragraph restates the requirements of paragraph (h) of AD 
2017-22-06, with revised service information and compliance method 
provisions. For Model CL-600-2B16 airplanes having serial numbers 
5701 through 5955 inclusive, 5957, 5960 through 5966 inclusive, 5968 
through 5971 inclusive, and 5981: Within 600 flight hours or 12 
months, whichever occurs first after November 30, 2017 (the 
effective date of AD 2017-22-06), do the inspections specified in 
paragraphs (h)(1) through (3) of this AD, and do all applicable 
related investigative and corrective actions, in accordance with the 
Accomplishment Instructions in Bombardier Service Bulletin 605-28-
010, dated October 19, 2015, or Bombardier Service Bulletin 605-28-
010, Revision 3, dated August 31, 2018. Do all applicable related 
investigative and corrective actions before further flight. Repeat 
the inspections at intervals not to exceed 600 flight hours or 12 
months, whichever occurs first. As of the effective date of this AD, 
use Bombardier Service Bulletin 605-28-010, Revision 3, dated August 
31, 2018, only.
    (1) Do a general visual inspection for traces of fuel coming 
from the right-hand engine boost pump at the location of the belly 
fairing screw (FS412, BL 0.0).
    (2) Do a general visual inspection for traces of fuel coming 
from the left-hand engine boost pump at the location of the belly 
fairing screw (FS412, BL 0.0).
    (3) Do a general visual inspection of the right-hand landing 
light compartment for traces of fuel coming from the APU EFP.

(i) New Requirements of This AD: Inspections and Rectifications

    For the airplanes identified in figure 1 to paragraph (i) of 
this AD: At the applicable compliance time specified in figure 1 to 
paragraph (i) of this AD, do a general visual inspection for any 
fuel leak from the engine and APU EFP electrical wiring conduit 
outlets, in accordance with the Accomplishment Instructions of the 
applicable service information specified in figure 1 to paragraph 
(i) of this AD. If any fuel leak is found during the general visual

[[Page 3187]]

inspection, before further flight, correct the fuel leak in 
accordance with the Accomplishment Instructions of the applicable 
service information specified in figure 1 to paragraph (i) of this 
AD. Thereafter, repeat the general visual inspection at intervals 
not to exceed 600 flight hours or 12 months, whichever occurs first.
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[GRAPHIC] [TIFF OMITTED] TR21JA22.003

(j) New Requirements of This AD: Inspection and Modification

    Within 60 months after the effective date of this AD: Do a 
detailed visual inspection of the APU for any damage or 
deformations, and modify the engine EFP installation, in accordance 
with the Accomplishment Instructions of the applicable service 
information specified in figure 2 to paragraph (j) of this AD. If 
any damage or deformations are found during the detailed visual 
inspection, before further flight, do the repair in accordance with 
the Accomplishment Instructions of the applicable service 
information specified in figure 2 to paragraph (j) of this AD.
[GRAPHIC] [TIFF OMITTED] TR21JA22.004

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(k) No Reporting Requirement

    Where service information identified in this AD specifies to 
submit certain information to the manufacturer, this AD does not 
include that requirement.

(l) Terminating Actions

    Accomplishing the actions required by paragraph (j) of this AD 
terminates all requirements of this AD.

(m) Credit for Previous Actions

    (1) This paragraph provides credit for actions required by 
paragraph (g) of this AD, if those actions were performed before the 
effective date of this AD using Bombardier Service Bulletin 604-28-
022, dated October 19, 2015, provided that within 4 months or 150 
flight hours from the effective date of this AD or within 1 year 
from the last inspection, whichever occurs first, the actions 
specified in paragraph (g) are done using Bombardier Service 
Bulletin 604-28-022, Revision 3, dated August 31, 2018. Bombardier 
Service Bulletin 604-28-022, dated October 19, 2015, was 
incorporated by reference in AD 2017-22-06.
    (2) This paragraph provides credit for actions required by 
paragraph (h) of this AD, if those actions were performed before the 
effective date of this AD using Bombardier Service Bulletin 605-28-
010, dated October 19, 2015, provided that within 4 months or 150 
flight hours from the effective date of this AD or within 1 year 
from the last inspection, whichever occurs first, the actions 
specified in paragraph (h) of this AD are done using Bombardier 
Service Bulletin 605-28-010, Revision 3, dated August 31, 2018. 
Bombardier Service Bulletin 605-28-010, dated October 19, 2015, was 
incorporated by reference in AD 2017-22-06.
    (3) This paragraph provides credit for actions required by 
paragraph (i) of this AD, if those actions were performed before the 
effective date of this AD using the service information in 
paragraphs (m)(3)(i) through (iii) of this AD, provided that within 
1 year from the last inspection, the actions accomplished in 
paragraph (i) of this AD are done using Bombardier Service Bulletin 
650-28-001, Revision 3, dated January 3, 2019. This service 
information is not incorporated by reference in this AD.

[[Page 3188]]

    (i) Bombardier Service Bulletin 650-28-001, dated November 3, 
2017.
    (ii) Bombardier Service Bulletin 650-28-001, Revision 1, dated 
May 14, 2018.
    (iii) Bombardier Service Bulletin 650-28-001, Revision 2, dated 
August 31, 2018.
    (4) This paragraph provides credit for actions required by 
paragraph (j) of this AD, if those actions were performed before the 
effective date of this AD using Bombardier Service Bulletin 604-28-
024, dated June 16, 2020. This service information is not 
incorporated by reference in this AD.

(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 responsible Flight Standards 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, 1600 Stewart Avenue, Suite 410, 
Westbury, NY 11590; telephone 516-228-7300; fax 516-794-5531. Before 
using any approved AMOC, notify your appropriate principal 
inspector, or lacking a principal inspector, the manager of the 
responsible Flight Standards Office.
    (2) Contacting the Manufacturer: For any requirement in this AD 
to obtain instructions from a manufacturer, the instructions must be 
accomplished using a method approved by the Manager, New York ACO 
Branch, FAA; or Transport Canada Civil Aviation (TCCA); or 
Bombardier, Inc.'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) TCCA AD CF-2016-32R4, dated October 13, 2020; and TCCA AD CF-
2020-38, dated October 13, 2020; for related information. This MCAI 
may be found in the AD docket on the internet at https://www.regulations.gov by searching for and locating Docket No. FAA-
2021-0725.
    (2) For more information about this AD, contact Steven 
Dzierzynski, Aerospace Engineer, Avionics and Electrical Systems 
Section, FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410, 
Westbury, NY 11590; telephone 516-228-7367; 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 (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 this AD specifies otherwise.
    (3) The following service information was approved for IBR on 
February 25, 2022.
    (i) Bombardier Service Bulletin 604-28-022, Revision 3, dated 
August 31, 2018.
    (ii) Bombardier Service Bulletin 604-28-024, Revision 01, dated 
May 28, 2021.
    (iii) Bombardier Service Bulletin 605-28-010, Revision 3, dated 
August 31, 2018.
    (iv) Bombardier Service Bulletin 605-28-012, dated June 16, 
2020.
    (v) Bombardier Service Bulletin 650-28-001, Revision 3, dated 
January 3, 2019.
    (vi) Bombardier Service Bulletin 650-28-002, dated June 16, 
2020.
    (4) The following service information was approved for IBR on 
November 30, 2017 (82 FR 49498, October 26, 2017).
    (i) Bombardier Service Bulletin 604-28-022, dated October 19, 
2015.
    (ii) Bombardier Service Bulletin 605-28-010, dated October 19, 
2015.
    (5) For service information identified in this AD, contact 
Bombardier Business Aircraft Customer Response Center, 400 
C[ocirc]te-Vertu Road West, Dorval, Qu[eacute]bec H4S 1Y9, Canada; 
telephone 1-514-855-2999; email [email protected]; internet 
https://www.bombardier.com.
    (6) You may view this service information at the FAA, 
Airworthiness Products Section, Operational Safety Branch, 2200 
South 216th St., Des Moines, WA. For information on the availability 
of this material at the FAA, call 206-231-3195.
    (7) 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, email [email protected], or go to: https://www.archives.gov/federal-register/cfr/ibr-locations.html.

    Issued on December 17, 2021.
Lance T. Gant,
Director, Compliance & Airworthiness Division, Aircraft Certification 
Service.
[FR Doc. 2022-00993 Filed 1-20-22; 8:45 am]
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