[Federal Register Volume 83, Number 27 (Thursday, February 8, 2018)]
[Proposed Rules]
[Pages 5587-5592]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2018-02088]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2018-0028; Product Identifier 2017-NM-143-AD]
RIN 2120-AA64


Airworthiness Directives; Bombardier, Inc., Airplanes

AGENCY: Federal Aviation Administration (FAA), DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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SUMMARY: We propose to adopt a new airworthiness directive (AD) for 
certain Bombardier, Inc., Model CL-600-1A11 (CL-600), CL-600-2A12 (CL-
601 Variant), and CL-600-2B16 (CL-601-3A, CL-601-3R, and CL-604 
Variants) airplanes. This proposed AD was prompted by a determination 
that the safe life limits of the horizontal stabilizer trim actuator 
(HSTA) attachment pins and trunnions were not listed in certain 
airworthiness limitations (AWLs) and that the HSTA attachment pins and 
trunnions were not serialized. This proposed AD would require revision 
of the maintenance or inspection program, as applicable, to include the 
latest revision of the AWLs, serialization of the HSTA attachment pins 
and trunnions, and repair or replacement of damaged HSTA attachment 
pins and trunnions. We are proposing this AD to address the unsafe 
condition on these products.

DATES: We must receive comments on this proposed AD by March 26, 2018.

ADDRESSES: You may send comments, using the procedures found in 14 CFR 
11.43 and 11.45, by any of the following methods:
     Federal eRulemaking Portal: Go to http://www.regulations.gov. Follow the instructions for submitting comments.
     Fax: 202-493-2251.
     Mail: U.S. Department of Transportation, Docket 
Operations, M-30, West Building Ground Floor, Room W12-140, 1200 New 
Jersey Avenue SE, Washington, DC 20590.
     Hand Delivery: Deliver to Mail address above between 9 
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
    For service information identified in this NPRM, contact 
Bombardier, Inc., 400 C[ocirc]te Vertu Road West, Dorval, Qu[eacute]bec 
H4S 1Y9, Canada; Widebody Customer Response Center North America toll-
free telephone 1-866-538-1247 or direct-dial telephone 1-514-855-2999; 
fax 514-855-7401; email [email protected]; internet http://www.bombardier.com. You may view this service information at the FAA, 
Transport Standards Branch, 1601 Lind Avenue SW, Renton, WA. For 
information on the availability of this material at the FAA, call 425-
227-1221.

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-
0028; or in person at the Docket Management Facility between 9 a.m. and 
5 p.m., Monday through Friday, except Federal holidays. The AD docket 
contains this NPRM, the regulatory evaluation, any comments received, 
and other information. The street address for the Docket Operations 
office (telephone 800-647-5527) is in the ADDRESSES section. Comments 
will be available in the AD docket shortly after receipt.

FOR FURTHER INFORMATION CONTACT: Aziz Ahmed, Aerospace Engineer, 
Airframe and Mechanical Systems Section, FAA, New York ACO Branch, 1600 
Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516-228-7239; 
fax 516-794-5531.

SUPPLEMENTARY INFORMATION: 

Comments Invited

    We invite you to send any written relevant data, views, or 
arguments about this proposed AD. Send your comments to an address 
listed under the ADDRESSES section. Include ``Docket No. FAA-2018-0028; 
Product Identifier 2017-NM-143-AD'' at the beginning of your comments. 
We specifically invite comments on the overall regulatory, economic, 
environmental, and energy aspects of this NPRM. We will consider all 
comments received by the closing date and may amend this NPRM based on 
those comments.
    We will post all comments we receive, without change, to http://www.regulations.gov, including any personal information you provide. We 
will also post a report summarizing each substantive verbal contact we 
receive about this NPRM.

Discussion

    Transport Canada Civil Aviation (TCCA), which is the aviation 
authority for Canada, has issued Canadian Airworthiness Directive CF-
2017-24, dated July 12, 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 (CL-
600), CL-600-2A12 (CL-601 Variant), and CL-600-2B16 (CL-601-3A, CL-601-
3R, and CL-604 Variants) airplanes. The MCAI states:

    During a review of the Horizontal Stabilizer Trim Actuator 
(HSTA) system, it was discovered that the safe life limits of the 
HSTA attachment pins and trunnions were not listed in the 
Airworthiness Limitation (AWL) Section of the Instructions for 
Continued Airworthiness. Also, the HSTA attachment pins and 
trunnions were not serialized making it impossible to keep accurate 
records of the life of these parts. Failure of these pins and 
trunnions could lead to a disconnect of the horizontal stabilizer 
and subsequent loss of the aeroplane.
    This [Canadian] AD mandates the incorporation of AWL tasks into 
the maintenance schedule and serialization of HSTA attachment pins 
and trunnions. Some aircraft require AWL tasks and serialization of 
the attachment pins only, while others require AWL tasks and 
serialization of the trunnions and attachment pins [and repair or 
replacement if damaged (including linear scratches, pits, spalling, 
dents, or surface texture variations)].

    This proposed AD would require revisions to certain operator 
maintenance documents to include new actions (e.g., inspections). 
Compliance with these actions is required by 14 CFR 91.403(c). For 
airplanes that have been previously modified, altered, or repaired in 
the areas addressed by this proposed AD, the operator may not be able 
to accomplish the actions described in the revisions. In this 
situation, to comply

[[Page 5588]]

with 14 CFR 91.403(c), the operator must request approval for an 
alternative method of compliance according to paragraph (m)(1) of this 
proposed AD. The request should include a description of changes to the 
required actions that will ensure the continued operational safety of 
the airplane.
    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-
0028.

Related Service Information Under 1 CFR Part 51

    Bombardier, Inc., has issued the following service information.
    The following service information describes procedures for 
serializing the HSTA attachment pins and trunnions. These documents are 
distinct since they apply to different airplane models in different 
configurations.
     Bombardier Service Bulletin 600-0760, Revision 01, dated 
April 21, 2017.
     Bombardier Service Bulletin 601-0626, Revision 01, dated 
April 21, 2017.
     Bombardier Service Bulletin 604-27-034, Revision 01, dated 
April 21, 2017.
     Bombardier Service Bulletin 605-27-005, Revision 01, dated 
April 21, 2017.
    The following service information identifies airworthiness 
limitation tasks for revising the life limits for HSTA attachment pins 
and trunnions. These documents are distinct since they apply to 
different airplane models in different configurations.
     Task 5-10-10, ``Time Limits (Structural),'' of Section 5-
10-00, ``Airworthiness Limitations,'' of Bombardier Challenger 600 Time 
Limits/Maintenance Checks, Publication No. PSP 605, Revision 38, dated 
March 28, 2017.
     Task 5-10-10, ``Time Limits (Structural)--Pre SB 601--
0280,'' of Section 5-10-00, ``Airworthiness Limitations,'' of 
Bombardier Challenger 601 Time Limits/Maintenance Checks, Publication 
No. PSP 601-5, Revision 45, dated March 28, 2017.
     Task 5-10-11, ``Time Limits (Structural)--Post SB 601--
0280,'' of Section 5-10-00, ``Airworthiness Limitations,'' of 
Bombardier Challenger 601 Time Limits/Maintenance Checks, Publication 
No. PSP 601-5, Revision 45, dated March 28, 2017.
     Task 5-10-12, ``Time Limits (Structural)--Post SB 601--
0360,'' of Section 5-10-00, ``Airworthiness Limitations,'' of 
Bombardier Challenger 601 Time Limits/Maintenance Checks, Publication 
No. PSP 601-5, Revision 45, dated March 28, 2017.
     Task 5-10-10, ``Time Limits (Structural),'' of Section 5-
10-00, ``Airworthiness Limitations,'' of Bombardier Challenger 601 Time 
Limits/Maintenance Checks, Publication No. PSP-601A5, Revision 41, 
dated March 28, 2017.
     Task 5-10-11, ``Time Limits (Structural),'' of Section 5-
10-00, ``Airworthiness Limitations,'' of Bombardier Challenger 601 Time 
Limits/Maintenance Checks, Publication No. PSP-601A5, Revision 41, 
dated March 28, 2017.
     Task 5-10-12, ``Time Limits (Structural),'' of Section 5-
10-00, ``Airworthiness Limitations,'' of Bombardier Challenger 601 Time 
Limits/Maintenance Checks, Publication No. PSP-601A5, Revision 41, 
dated March 28, 2017.
    The following service information describes life limits for certain 
HSTA attachment pins and trunnion supports. These documents are 
distinct since they apply to different airplane models in different 
configurations.
     Task 27-42-01-108, ``Discard of the Horizontal-Stabilizer 
Trim-Actuator (HSTA) Trunnion Support; Part No. 601R92386-1/-3,'' of 
Section 5-10-10, ``Life Limits (Structures),'' of Bombardier Challenger 
604 CL-604 Time Limits/Maintenance Checks, Part 2 Airworthiness 
Limitations, Revision 29, dated June 16, 2017.
     Task 27-42-01-112, ``Discard of the Horizontal-Stabilizer 
Trim-Actuator (HSTA) Upper and Lower Attachment Pins; Upper Pin Part 
No. 600-92384-5/-7 or 601R92310-1/-3 and Lower Pin Part No. 600-92383-
5/-7 or 601R92309-1/-3,'' of Section 5-10-10, ``Life Limits 
(Structures),'' of Bombardier Challenger 604 CL-604 Time Limits/
Maintenance Checks, Part 2 Airworthiness Limitations, Revision 29, 
dated June 16, 2017.
     Task 27-42-01-108, ``Discard of the Horizontal-Stabilizer 
Trim-Actuator (HSTA) Trunnion Support; Part No. 601R92386-1/-3,'' of 
Section 5-10-10, ``Life Limits (Structures),'' of Bombardier Challenger 
605 CL-605 Time Limits/Maintenance Checks, Part 2 Airworthiness 
Limitations, Revision 17, dated June 16, 2017.
     Task 27-42-01-112, ``Discard of the Horizontal-Stabilizer 
Trim-Actuator (HSTA) Upper and Lower Attachment Pins; Upper Pin Part 
No. 600-92384-5/-7 or 601R92310-1/-3 and Lower Pin Part No. 600-92383-
5/-7 or 601R92309-1/-3,'' of Section 5-10-10, ``Life Limits 
(Structures),'' of Bombardier Challenger 605 CL-605 Time Limits/
Maintenance Checks, Part 2 Airworthiness Limitations, Revision 17, 
dated June 16, 2017.
     Task 27-42-01-108, ``Discard of the Horizontal-Stabilizer 
Trim-Actuator (HSTA) Trunnion Support; Part No. 601R92386-1/-3,'' of 
Section 5-10-10, ``Life Limits (Structures),'' of Bombardier Challenger 
650 CL-650 Time Limits/Maintenance Checks, Part 2 Airworthiness 
Limitations, Revision 4, dated June 16, 2017.
     Task 27-42-01-112, ``Discard of the Horizontal-Stabilizer 
Trim-Actuator (HSTA) Upper and Lower Attachment Pins; Upper Pin Part 
No. 600-92384-5/-7 or 601R92310-1/-3 and Lower Pin Part No. 600-92383-
5/-7 or 601R92309-1/-3,'' of Section 5-10-10, ``Life Limits 
(Structures),'' of Bombardier Challenger 650 CL-650 Time Limits/
Maintenance Checks, Part 2 Airworthiness Limitations, Revision 4, dated 
June 16, 2017.
    The following service information describes procedures for 
identifying damage to HSTA attachment pins and trunnions, and repair or 
replacement instructions. These documents are distinct since they apply 
to different airplane models in different configurations.
     Bombardier Repair Engineering Order (REO) 600-27-42-002, 
``General Repair--HSTA Upper and Lower Pins,'' dated December 15, 2016.
     Bombardier Repair Engineering Order (REO) 600-27-42-011, 
``General Repair--HSTA Trunnion P/N 601R92386-1/-3,'' dated December 
15, 2016.
     Bombardier Repair Engineering Order (REO) 604-27-42-012, 
``General Repair--HSTA Upper and Lower Pins,'' dated December 15, 2016.
    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.

FAA's Determination and Requirements of This Proposed AD

    This product has been approved by the aviation authority of another 
country, and is approved for operation in the United States. Pursuant 
to our bilateral agreement with the State of Design Authority, we have 
been notified of the unsafe condition described in the MCAI and service 
information referenced above. We are proposing this AD because we 
evaluated all pertinent information and determined an unsafe condition 
exists and is likely to exist or develop on other products of these 
same type designs.

Costs of Compliance

    We estimate that this proposed AD affects 137 airplanes of U.S. 
registry.

[[Page 5589]]

    We estimate the following costs to comply with this proposed AD:

                                                 Estimated Costs
----------------------------------------------------------------------------------------------------------------
            Action                Labor cost       Parts cost        Cost per product     Cost on U.S. operators
----------------------------------------------------------------------------------------------------------------
Revision of maintenance or     1 work-hour x                 $0  $85....................  $11,645.
 inspection program.            $85 per hour =
                                $85.
Serialization................  Up to 20 work-               449  Up to $2,149...........  Up to $294,413.
                                hours x $85 per
                                hour = $1,700.
----------------------------------------------------------------------------------------------------------------

    We have received no definitive data that would enable us to provide 
cost estimates for the on-condition actions specified in this proposed 
AD.

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 proposed 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 to the Director of the System Oversight 
Division.

Regulatory Findings

    We determined that this proposed AD would not have federalism 
implications under Executive Order 13132. This proposed AD would 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 this proposed 
regulation:
    1. Is not a ``significant regulatory action'' under Executive Order 
12866;
    2. Is not a ``significant rule'' under the 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.

The Proposed Amendment

    Accordingly, under the authority delegated to me by the 
Administrator, the FAA proposes to amend 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 adding the following new airworthiness 
directive (AD):

Bombardier, Inc.: Docket No. FAA-2018-0028; Product Identifier 2017-
NM-143-AD.

(a) Comments Due Date

    We must receive comments by March 26, 2018.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to the Bombardier, Inc., airplanes identified in 
paragraphs (c)(1) through (c)(4) of this AD, certificated in any 
category.
    (1) Model CL-600-1A11 (CL-600) airplanes, serial numbers 1002 
and 1004 through 1085 inclusive.
    (2) Model CL-600-2A12 (CL-601 Variant) airplanes, serial numbers 
3001 through 3066 inclusive.
    (3) Model CL-600-2B16 (CL-601-3A and CL-601-3R Variants) 
airplanes, serial numbers 5001 through 5194 inclusive.
    (4) Model CL-600-2B16 (CL-604 Variant) airplanes, serial numbers 
5301 through 5665 inclusive, 5701 through 5990 inclusive, and 6050 
and subsequent.

(d) Subject

    Air Transport Association (ATA) of America Code 27, Flight 
controls.

(e) Reason

    This AD was prompted by a determination that the safe life 
limits of the horizontal stabilizer trim actuator (HSTA) attachment 
pins and trunnions were not listed in certain airworthiness 
limitations (AWLs) and that the HSTA attachment pins and trunnions 
were not serialized. We are issuing this AD to prevent failure of 
the HSTA attachment pins and trunnions, which could lead to a 
disconnect of the horizontal stabilizer and subsequent loss of the 
airplane.

(f) Compliance

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

(g) Maintenance or Inspection Program Revision for Model CL-600-1A11 
(CL-600), Model CL-600-2A12 (CL-601 Variant), and Model CL-600-2B16 
(CL-601-3A and CL-601-3R Variants) Airplanes

    For airplanes identified in paragraphs (c)(1), (c)(2), and 
(c)(3) of this AD: Within 60 days after the effective date of this 
AD, revise the maintenance or inspection program, as applicable, to 
incorporate the life limit AWL tasks identified in table 1 to 
paragraph (g) of this AD, as specified in the applicable service 
information identified in paragraphs (g)(1), (g)(2), or (g)(3) of 
this AD. The initial compliance time is within 500 flight cycles of 
the effective date of this AD, or at the applicable time (in terms 
of landings) specified in the applicable AWL task identified in 
table 1 to paragraph (g) of this AD, whichever occurs later.
    (1) For Model CL-600-1A11 (CL-600) airplanes, Task 5-10-10, 
``Time Limits (Structural),'' of Section 5-10-00, ``Airworthiness 
Limitations,'' of Bombardier Challenger 600 Time Limits/Maintenance 
Checks, Publication No. PSP 605, Revision 38, dated March 28, 2017.
    (2) For Model CL-600-2A12 (CL-601 Variant) airplanes, the 
applicable task specified in paragraph (g)(2)(i), (g)(2)(ii), or 
(g)(2)(iii) of this AD, as identified in Section 5-10-00, 
``Airworthiness Limitations,'' of

[[Page 5590]]

Bombardier Challenger 601 Time Limits/Maintenance Checks, 
Publication No. PSP 601-5, Revision 45, dated March 28, 2017.
    (i) Task 5-10-10, ``Time Limits (Structural)--Pre SB 601-0280.''
    (ii) Task 5-10-11, ``Time Limits (Structural)--Post SB 601-
0280.''
    (iii) Task 5-10-12, ``Time Limits (Structural)--Post SB 601-
0360.''
    (3) For Model CL-600-2B16 (CL-601-3A and CL-601-3R Variants) 
airplanes, the applicable task specified in paragraph (g)(3)(i), 
(g)(3)(ii) or (g)(3)(iii) of this AD, as identified in Section 5-10-
00, ``Airworthiness Limitations,'' of Bombardier Challenger 601 Time 
Limits/Maintenance Checks, Publication No. PSP-601A5, Revision 41, 
dated March 28, 2017.
    (i) Task 5-10-10, ``Time Limits (Structural).''
    (ii) Task 5-10-11, ``Time Limits (Structural).''
    (iii) Task 5-10-12, ``Time Limits (Structural).''
    [GRAPHIC] [TIFF OMITTED] TP08FE18.002
    
(h) Maintenance or Inspection Program Revision for Model CL-600-2B16 
(CL-604 Variant) Airplanes

    For airplanes identified in paragraph (c)(4) of this AD: Within 
60 days after the effective date of this AD, revise the maintenance 
or inspection program, as applicable, to incorporate new life limit 
AWL task 27-42-01-108, ``Discard of the Horizontal-Stabilizer Trim-
Actuator (HSTA) Trunnion Support; Part No. 601R92386-1/-3,'' and 
task 27-42-01-112, ``Discard of the Horizontal-Stabilizer Trim-
Actuator (HSTA) Upper and Lower Attachment Pins; Upper Pin Part No. 
600-92384-5/-7 or 601R92310-1/-3 and Lower Pin Part No. 600-92383-5/
-7 or 601R92309-1/-3,'' as specified in the applicable time limits 
maintenance checks (TLMC) manuals identified in paragraphs (h)(1), 
(h)(2), and (h)(3) of this AD. The initial compliance time is within 
500 flight cycles after the effective date of this AD, or at the 
applicable time specified in the applicable AWL task, whichever 
occurs later.
    (1) For airplanes having serial numbers 5301 through 5665 
inclusive: Section 5-10-10, ``Life Limits (Structures),'' of 
Bombardier Challenger 604 CL-604 Time Limits/Maintenance Checks, 
Part 2 Airworthiness Limitations, Revision 29, dated June 16, 2017.
    (2) For airplanes having serial numbers 5701 through 5990 
inclusive: Section 5-10-10, ``Life Limits (Structures),'' of 
Bombardier Challenger 605 CL-605 Time Limits/Maintenance Checks, 
Part 2 Airworthiness Limitations, Revision 17, dated June 16, 2017.
    (3) For airplanes having serial numbers 6050 and subsequent: 
Section 5-10-10, ``Life Limits (Structures),'' of Bombardier 
Challenger 650 CL-650 Time Limits/Maintenance Checks, Part 2 
Airworthiness Limitations, Revision 4, dated June 16, 2017.

(i) Serialization of HSTA Attachment Pins and Trunnions

    For airplanes identified in table 2 to paragraph (i) of this AD: 
Within 48 months after the effective date of this AD, or prior to 
performing a maintenance task required by paragraph (g) or (h) of 
this AD, as applicable, whichever occurs first, do a general visual 
inspection for damage (including linear scratches, pits, spalling, 
dents, or surface texture variations), and add serial numbers to the 
HSTA trunnions, lower attachment pin, and upper attachment pin, as 
applicable, in accordance with the Accomplishment Instructions of 
the applicable service information specified in table (2) to 
paragraph (i) of this AD. If any damage to the HSTA trunnions or 
attachment pins is found, repair the damage in accordance with the 
applicable service information specified in paragraph (i)(1), 
(i)(2), or (i)(3) of this AD; or 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. If the damaged HSTA trunnion 
or attachment pin cannot be repaired in accordance with the 
applicable service information specified in paragraph (i)(1), 
(i)(2), or (i)(3) of this AD: Before further flight, replace the 
damaged HSTA trunnion or attachment pin with a serviceable 
serialized HSTA trunnion or attachment pin, in accordance with the 
applicable service information specified in table (2) to paragraph 
(i) of this AD.
    (1) Bombardier Repair Engineering Order (REO) 600-27-42-002, 
``General Repair--HSTA Upper and Lower Pins,'' dated December 15, 
2016.
    (2) Bombardier Repair Engineering Order (REO) 600-27-42-011, 
``General Repair--HSTA Trunnion P/N 601R92386-1/-3,'' dated December 
15, 2016.
    (3) Bombardier Repair Engineering Order (REO) 604-27-42-012, 
``General Repair--HSTA Upper and Lower Pins,'' dated December 15, 
2016.

BILLING CODE 4910-13-P

[[Page 5591]]

[GRAPHIC] [TIFF OMITTED] TP08FE18.003

BILLING CODE 4910-13-C

(j) No Alternative Actions or Intervals

    After the maintenance or inspection program has been revised as 
required by paragraph (g) or (h) 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 (m)(1) of 
this AD.

(k) Credit for Previous Actions

    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 specified in paragraph 
(k)(1), (k)(2), (k)(3), or (k)(4) of this AD, as applicable.
    (1) Bombardier Service Bulletin 600-0760, dated February 25, 
2013.
    (2) Bombardier Service Bulletin 601-0626, dated February 25, 
2013.
    (3) Bombardier Service Bulletin 604-27-034, dated February 25, 
2013.
    (4) Bombardier Service Bulletin 605-27-005, dated February 25, 
2013.

(l) Parts Installation Limitations

    (1) As of the effective date of this AD, no person may install, 
on any airplane, an HSTA attachment pin, unless the pin has a serial 
number.
    (2) As of the effective date of this AD, no person may install, 
on any Bombardier, Inc., Model CL-600-2B16 (CL-604 Variant) airplane 
with serial number 5301 and subsequent, an HSTA trunnion, unless the 
HSTA trunnion has a serial number.

(m) Other FAA AD Provisions

    The following provisions also apply to this AD:
    (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, 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 
local flight standards district office/certificate holding district 
office.
    (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 TCCA; or Bombardier, Inc.'s TCCA DAO. If approved by 
the DAO, the approval must include the DAO-authorized signature.

(n) Related Information

    (1) Refer to Mandatory Continuing Airworthiness Information 
(MCAI) Canadian Airworthiness Directive CF-2017-24, dated July 12, 
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-2018-0028.
    (2) For more information about this AD, contact Aziz Ahmed, 
Aerospace Engineer, Airframe and Mechanical Systems Section, FAA, 
New York ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 
11590; telephone 516-228-7239; fax 516-794-5531.
    (3) For service information identified in this AD, contact 
Bombardier, Inc., 400 C[ocirc]te Vertu Road West, Dorval, 
Qu[eacute]bec H4S 1Y9, Canada; Widebody Customer Response Center 
North America toll-free telephone 1-

[[Page 5592]]

866-538-1247 or direct-dial telephone 1-514-855-2999; fax 514-855-
7401; email [email protected]; internet http://www.bombardier.com. You may view this service information at the 
FAA, Transport Standards Branch, 1601 Lind Avenue SW, Renton, WA. 
For information on the availability of this material at the FAA, 
call 425-227-1221.


    Issued in Renton, Washington, on January 26, 2018.
Michael Kaszycki,
Acting Director, System Oversight Division, Aircraft Certification 
Service.
[FR Doc. 2018-02088 Filed 2-7-18; 8:45 am]
 BILLING CODE 4910-13-P