[Federal Register Volume 87, Number 7 (Tuesday, January 11, 2022)]
[Rules and Regulations]
[Pages 1346-1349]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2021-28567]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2021-0784; Project Identifier MCAI-2020-01455-T; 
Amendment 39-21857; AD 2021-25-13]
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 adopting a new airworthiness directive (AD) 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. This AD 
was prompted by a determination that new or more restrictive 
airworthiness limitations are necessary. This AD requires revising the 
existing maintenance or inspection program, as applicable, to 
incorporate new or more restrictive airworthiness limitations. The FAA 
is issuing this AD to address the unsafe condition on these products.

DATES: This AD is effective February 15, 2022.
    The Director of the Federal Register approved the incorporation by 
reference of certain publications listed in this AD as of February 15, 
2022.

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; 514-
855-2999; email [email protected]; internet https://www.bombardier.com. 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. It is also available on the 
internet at https://www.regulations.gov by searching for and locating 
Docket No. FAA-2021-0784.

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-
0784; 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: Elizabeth Dowling, Aerospace Engineer, 
Mechanical Systems and Administrative Services Section, FAA, New York 
ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; 
telephone 516-228-7300; fax 516-794-5531; email [email protected].

SUPPLEMENTARY INFORMATION:

Background

    Transport Canada Civil Aviation (TCCA), which is the aviation 
authority for Canada, has issued TCCA AD CF-2020-44, dated October 23, 
2020 (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. 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-
0784.
    The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 
CFR part 39 by adding an AD that would apply 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, 2021 (86 FR 51029). The NPRM was 
prompted by a determination that new or more restrictive airworthiness 
limitations are necessary. The NPRM proposed to require revising the 
existing maintenance or inspection program, as applicable, to 
incorporate new or more restrictive airworthiness limitations. The FAA 
is issuing this AD to address fatigue cracking and loss of structural 
integrity of the circumferential splice joint, which could result in 
reduced structural integrity of the airplane. See the MCAI for 
additional background information.

Comments

    The FAA gave the public the opportunity to participate in 
developing this final rule. The FAA received no comments on the NPRM or 
on the determination of the cost to the public.

Conclusion

    The FAA reviewed the relevant data and determined that air safety 
and the public interest require adopting this final rule as proposed, 
except for 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.

Related Service Information Under 1 CFR Part 51

    The FAA reviewed the following Bombardier service information, 
which describes new or more restrictive airworthiness limitations (a 
special detailed inspection for cracking of the skin circumferential 
splice at fuselage station (FS) 559.00, between stringer (STR) 10L and 
STR10R). Note: The asterisk (or ``one star'') with the last three 
digits of the task number indicates that the task is an airworthiness 
limitation task.
     Bombardier Challenger 600 Time Limits/Maintenance Checks 
(TLMC), Product Support Publication (PSP) 605, Temporary Revision (TR) 
5-163, dated April 30, 2020, which includes Task 53-30-00-165*, ``Skin 
Circumferential Splice at FS559.00, between STR10L and STR10R.''
     Bombardier Challenger 601 TLMC, PSP 601-5, TR 5-267, dated 
April 30, 2020, which includes Task 53-30-00-188*, ``Skin 
Circumferential Splice at FS559.00, between STR10L and STR10R.''
     Bombardier Challenger 601 TLMC, PSP 601A-5, TR 5-281, 
dated April 30, 2020, which includes Task 53-30-00-191*, ``Skin 
Circumferential Splice at FS559.00, between STR10L and STR10R.''
     Section 5-10-30, Airworthiness Limitation Items, 
Bombardier Challenger 604 TLMC, Publication No. CH 604 TLMC, Part 2, 
Revision 32, dated December 18, 2019, which includes Task 53-20-00-
192*, ``Special Detailed Inspection of the Skin

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Circumferential Splice at FS559.00, between Stringers10L and 10R.''
     Section 5-10-30, Airworthiness Limitation Items, 
Bombardier Challenger 605 TLMC, Publication No. CH 605 TLMC, Part 2, 
Revision 21, dated December 18, 2019, which includes Task 53-20-00-
192*, ``Special Detailed Inspection of the Skin Circumferential Splice 
at FS559.00, between Stringers10L and 10R.''
     Section 5-10-30, Airworthiness Limitation Items, 
Bombardier Challenger 650 TLMC, Publication No. CH 650 TLMC, Part 2, 
Revision 8, dated December 18, 2019, which includes Task 53-20-00-192*, 
``Special Detailed Inspection of the Skin Circumferential Splice at 
FS559.00, between Stringers10L and 10R.''
    These documents are distinct since they apply to different airplane 
configurations. 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 463 airplanes of U.S. 
registry. The FAA estimates the following costs to comply with this AD:
    The FAA has determined that revising the existing maintenance or 
inspection program takes an average of 90 work-hours per operator, 
although the agency recognizes that this number may vary from operator 
to operator. Since operators incorporate maintenance or inspection 
program changes for their affected fleet(s), the FAA has determined 
that a per-operator estimate is more accurate than a per-airplane 
estimate. Therefore, the agency estimates the average total cost per 
operator to be $7,650 (90 work-hours x $85 per work-hour).

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

    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 adding the following new airworthiness 
directive:

2021-25-13 Bombardier, Inc.: Amendment 39-21857; Docket No. FAA-
2021-0784; Project Identifier MCAI-2020-01455-T.

(a) Effective Date

    This airworthiness directive (AD) is effective February 15, 
2022.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to the Bombardier, Inc., airplanes, certificated 
in any category, identified in paragraphs (c)(1) through (3) 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 (601-3A, 601-3R, and 604 Variants) 
airplanes, serial numbers 5001 through 5194 inclusive, 5301 through 
5665 inclusive, 5701 through 6049 inclusive, and 6050 through 6999 
inclusive.

(d) Subject

    Air Transport Association (ATA) of America Code 05, Time Limits/
Maintenance Checks.

(e) Reason

    This AD was prompted by a determination that new or more 
restrictive airworthiness limitations are necessary. The FAA is 
issuing this AD to address fatigue cracking and loss of structural 
integrity of the circumferential splice joint, which could result in 
reduced structural integrity of the airplane.

(f) Compliance

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

(g) Maintenance or Inspection Program Revision

    Within 60 days after the effective date of this AD, revise the 
existing maintenance or inspection program, as applicable, to 
incorporate the information specified in Figure 1 to paragraph (g) 
of this AD. The initial compliance time for doing the tasks is at 
the time specified in the applicable document specified in Figure 1 
to paragraph (g) of this AD, or within 60 days after the effective 
date of this AD, whichever occurs later.
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(h) No Alternative Actions or Intervals

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

(i) 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

[[Page 1349]]

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.

(j) Related Information

    (1) Refer to Mandatory Continuing Airworthiness Information 
(MCAI) TCCA AD CF-2020-44, dated October 23, 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-2021-0784.
    (2) For more information about this AD, contact Elizabeth 
Dowling, Aerospace Engineer, Mechanical Systems and Administrative 
Services Section, FAA, New York ACO Branch, 1600 Stewart Avenue, 
Suite 410, Westbury, NY 11590; telephone 516-228-7300; fax 516-794-
5531; email [email protected].

(k) 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.
    (i) Bombardier Challenger 600 Time Limits/Maintenance Checks 
(TLMC), Product Support Publication (PSP) 605, Temporary Revision 
(TR) 5-163, dated April 30, 2020.
    (ii) Bombardier Challenger 601 TLMC, PSP 601-5, TR 5-267, dated 
April 30, 2020.
    (iii) Bombardier Challenger 601 TLMC, PSP 601A-5, TR 5-281, 
dated April 30, 2020.
    (iv) Section 5-10-30, Airworthiness Limitation Items, of the 
Bombardier Challenger 604 TLMC, Publication No. CH 604 TLMC, Part 2, 
Revision 32, dated December 18, 2019.
    (v) Section 5-10-30, Airworthiness Limitation Items, of the 
Bombardier Challenger 605 TLMC, Publication No. CH 605 TLMC, Part 2, 
Revision 21, dated December 18, 2019.
    (vi) Section 5-10-30, Airworthiness Limitation Items, of the 
Bombardier Challenger 650 TLMC, Publication No. CH 650 TLMC, Part 2, 
Revision 8, dated December 18, 2019.
    (3) 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; 
514-855-2999; email [email protected]; internet https://www.bombardier.com.
    (4) 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.
    (5) 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: http://www.archives.gov/federal-register/cfr/ibr-locations.html.

    Issued on December 3, 2021.
Lance T. Gant,
Director, Compliance & Airworthiness Division, Aircraft Certification 
Service.
[FR Doc. 2021-28567 Filed 1-10-22; 8:45 am]
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