Airworthiness Directives; Bombardier, Inc., Airplanes

[Federal Register Volume 84, Number 114 (Thursday, June 13, 2019)]
[Rules and Regulations]
[Pages 27503-27506]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2019-12351]



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Rules and Regulations
                                                Federal Register
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Federal Register / Vol. 84, No. 114 / Thursday, June 13, 2019 / Rules 
and Regulations

[[Page 27503]]



DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2019-0024; Product Identifier 2018-NM-138-AD; Amendment 
39-19640; AD 2019-10-01]
RIN 2120-AA64


Airworthiness Directives; Bombardier, Inc., Airplanes

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

ACTION: Final rule.

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

SUMMARY: We are adopting a new airworthiness directive (AD) for certain 
Bombardier, Inc., Model CL-600-2A12 (601) airplanes. This AD was 
prompted by a report of damage to the anti-rotation tab on a main 
landing gear (MLG) side brace fitting due to the installation of an 
incorrect side brace fitting shaft. This AD requires an inspection of 
the MLG side brace fitting for damage, a verification of the side brace 
fitting shaft part number, and replacement of the side brace fitting 
shaft if necessary. It also requires the installation of an anti-
rotation bracket. We are issuing this AD to address the unsafe 
condition on these products.

DATES: This AD is effective July 18, 2019.
    The Director of the Federal Register approved the incorporation by 
reference of a certain publication listed in this AD as of July 18, 
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-2019-0024.

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-2019-
0024; 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: Aziz Ahmed, Aerospace Engineer, FAA, 
New York ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, New York 
11590; telephone: 516-287-7329; fax: 516-794-5531; email: 
[email protected].

SUPPLEMENTARY INFORMATION: 

Discussion

    We 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-600-2A12 (601) airplanes. The NPRM published in the Federal 
Register on February 28, 2019 (84 FR 6705). The NPRM was prompted by a 
report of damage to the anti-rotation tab on an MLG side brace fitting 
due to the installation of an incorrect side brace fitting shaft. The 
NPRM proposed to require an inspection of the MLG side brace fitting 
for damage, a verification of the side brace fitting shaft part number, 
and replacement of the side brace fitting shaft if necessary. It also 
proposed to require the installation of an anti-rotation bracket.
    We are issuing this AD to address premature cracking of the MLG 
side brace fitting. This condition, if not corrected, could lead to the 
collapse of the MLG, resulting in structural damage to the wing spar 
and fuel tank.
    Transport Canada Civil Aviation (TCCA), which is the aviation 
authority for Canada, has issued Canadian AD CF-2018-19, dated July 20, 
2018 (referred to after this as the Mandatory Continuing Airworthiness 
Information, or ``the MCAI''), to correct an unsafe condition for 
certain Bombardier, Inc., Model CL-600-2A12 (601) airplanes. The MCAI 
states:

    There has been a report of damage to the anti-rotation tab on a 
Main Landing Gear (MLG) Side Brace fitting. Investigation of the 
report revealed that a Challenger model CL600 MLG Side Brace shaft 
had been installed on a Challenger model CL601 Side Brace fitting. 
Due to the difference in size, this will result in changes to the 
way the load is transferred between the shaft and the MLG Side Brace 
fitting and may result in premature cracking of the MLG Side Brace 
fitting. This condition, if not corrected, could lead to the 
collapse of the MLG resulting in structural damage to the wing spar 
and fuel tank.
    This [Canadian] AD mandates an inspection of the MLG Side Brace 
fitting and shaft to verify that the correct shaft part number (P/N) 
is installed and the fitting is not damaged [damage includes 
cracking, scratches, gouges, corrosion, defects, and incorrect inner 
diameter tolerance]. If the Challenger CL600 shaft is installed, 
this AD mandates replacement with the correct Challenger model CL601 
part. If the correct P/N is found installed, this [Canadian] AD also 
mandates the installation of a bracket to prevent the incorrect part 
from being installed in the future.

    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-2019-
0024.

Comments

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

Conclusion

    We 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. We have determined that these minor 
changes:
    <bullet> Are consistent with the intent that was proposed in the 
NPRM for addressing the unsafe condition; and
    <bullet> Do not add any additional burden upon the public than was 
already proposed in the NPRM.

[[Page 27504]]

Related Service Information Under 1 CFR Part 51

    Bombardier has issued Service Bulletin 601-0624, Revision 02, dated 
January 29, 2018. This service information describes procedures for 
inspecting the MLG side brace fitting and side brace fitting shaft, 
installing a replacement side brace fitting shaft if necessary, and 
installing an anti-rotation bracket.
    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 9 airplanes of U.S. registry. We 
estimate the following costs to comply with this AD:

                                      Estimated Costs for Required Actions
----------------------------------------------------------------------------------------------------------------
                                                                                    Cost per       Cost on U.S.
                          Labor cost                              Parts cost        product         operators
----------------------------------------------------------------------------------------------------------------
4 work-hours x $85 per hour = $340...........................            $397             $737           $6,633
----------------------------------------------------------------------------------------------------------------

    We estimate the following costs to do any necessary on-condition 
actions that would be required based on the results of any required 
actions. We have no way of determining the number of aircraft that 
might need these on-condition actions:

                 Estimated Costs of On-Condition Actions
------------------------------------------------------------------------
                                                             Cost per
              Labor cost                   Parts cost        product
------------------------------------------------------------------------
8 work-hours x $85 per hour = $680....          $7,989           $8,669
------------------------------------------------------------------------

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

    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 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.

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 (AD):

2019-10-01 Bombardier, Inc.: Amendment 39-19640; Docket No. FAA-
2019-0024; Product Identifier 2018-NM-138-AD.

(a) Effective Date

    This AD is effective July 18, 2019.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to Bombardier, Inc., Model CL-600-2A12 (601) 
airplanes, certificated in any category, serial numbers (S/N) 3001 
through 3009 inclusive and 3011 through 3029 inclusive.

(d) Subject

    Air Transport Association (ATA) of America Code 57, Wings.

(e) Reason

    This AD was prompted by a report of damage to the anti-rotation 
tab on a main landing gear (MLG) side brace fitting due to the 
installation of an incorrect side brace fitting shaft. We are 
issuing this AD to address premature cracking of the MLG side brace 
fitting. This condition, if not corrected, could lead to the 
collapse of the MLG, resulting in structural damage to the wing spar 
and fuel tank.

[[Page 27505]]

(f) Compliance

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

(g) Inspection for Damage and Identification of the Side Brace Fitting 
Shaft Part Number

    Within 400 flight cycles or 12 months, whichever occurs first, 
after the effective date of this AD, do the actions specified in 
paragraphs (g)(1) and (g)(2) of this AD.
    (1) Identify the part number of the installed side brace fitting 
shaft.
    (2) Do a detailed visual inspection (DVI) of the side brace 
fitting for signs of damage, including cracking and gouges, in 
accordance with paragraph 2.B. of the Accomplishment Instructions of 
Bombardier Service Bulletin 601-0624, Revision 02, dated January 29, 
2018.

(h) Installation of Anti-Rotation Bracket

    (1) For airplanes on which a side brace fitting shaft having P/N 
600-10237-3 is installed and the actions required by paragraph (g) 
of this AD are done on or after the effective date of this AD: 
Before further flight, modify the MLG side brace fitting by 
installing the anti-rotation bracket in accordance with paragraph 
2.C. of the Accomplishment Instructions of Bombardier Service 
Bulletin 601-0624, Revision 02, dated January 29, 2018.
    (2) For airplanes on which a side brace fitting shaft having P/N 
600-10237-3 is installed and the actions required by paragraph (g) 
of this AD were done before the effective date of this AD: Within 6 
months after the effective date of this AD, modify the MLG side 
brace fitting by installing the anti-rotation bracket in accordance 
with paragraph 2.C. of the Accomplishment Instructions of Bombardier 
Service Bulletin 601-0624, Revision 02, dated January 29, 2018.

(i) Replacement of the Side Brace Fitting Shaft and Installation of the 
Anti-Rotation Bracket

    (1) For airplanes on which a side brace fitting shaft having P/N 
600-10237-1 or 600-10237-5 is installed and damage is found during 
the DVI of the side brace fitting: Before further flight, do a DVI 
of the anti-rotation tab and side brace fitting aft bushing for 
cracking, scratches, gouges, corrosion, and inner diameter 
tolerance, and a special detailed inspection (SDI) of the side brace 
fitting aft bore for cracks and defects; perform applicable repairs; 
replace the side brace fitting shaft with a side brace fitting shaft 
having P/N 600-10237-3; and install the anti-rotation bracket in 
accordance with paragraph 2.D. of the Accomplishment Instructions of 
Bombardier Service Bulletin 601-0624, Revision 02, dated January 29, 
2018.
    (2) For airplanes on which a side brace fitting shaft having P/N 
600-10237-1 or 600-10237-5 is installed and no damage is found 
during the DVI of the side brace fitting: Within 300 flight cycles 
or 12 months, whichever occurs first, after the inspection required 
by paragraph (g)(2) of this AD, do a DVI of the anti-rotation tab 
and side brace fitting aft bushing for cracking, scratches, gouges, 
corrosion, and inner diameter tolerance, and an SDI of the side 
brace fitting aft bore for cracks and defects; perform applicable 
repairs; replace the side brace fitting shaft with a side brace 
fitting shaft having P/N 600-10237-3; and install the anti-rotation 
bracket in accordance with paragraph 2.D. of the Accomplishment 
Instructions of Bombardier Service Bulletin 601-0624, Revision 02, 
dated January 29, 2018.

(j) Exceptions to Service Information

    Where Bombardier Service Bulletin 601-0624, Revision 02, dated 
January 29, 2018, specifies contacting Bombardier's Customer Support 
Engineering for repair instructions: This AD requires doing the 
repair before further flight using a method approved in accordance 
with the procedures specified in paragraph (l)(2) of this AD.

(k) Credit for Previous Actions

    (1) For an airplane on which a side brace fitting shaft having 
P/N 600-10237-3 is installed: This paragraph provides credit for 
actions required by paragraphs (g) and (h) of this AD, if those 
actions were performed before the effective date of this AD using 
Bombardier Service Bulletin 601-0624, dated October 1, 2012; or 
Bombardier Service Bulletin 601-0624, Revision 01, dated March 29, 
2017.
    (2) 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 601-
0624, dated October 1, 2012; or Bombardier Service Bulletin 601-
0624, Revision 01, dated March 29, 2017, provided that the side 
brace fitting shaft was identified as having P/N 600-10237-3 and 
within 6 months after the effective date of this AD, the MLG side 
brace fitting is modified by installing the anti-rotation bracket in 
accordance with paragraph 2.C. of the Accomplishment Instructions of 
Bombardier Service Bulletin 601-0624, Revision 02, dated January 29, 
2018.
    (3) This paragraph provides credit for actions required by 
paragraphs (g) and (i) of this AD, if those actions were performed 
before the effective date of this AD using Bombardier Service 
Bulletin 601-0624, Revision 01, dated March 29, 2017, provided that 
any side brace fitting shaft having P/N 600-10237-1 or P/N 600-
10237-5 was identified and replaced with a side brace fitting shaft 
having P/N 600-10237-3, and the anti-rotation bracket was installed 
in accordance with paragraph 2.D. of the Accomplishment Instructions 
of Bombardier Service Bulletin 601-0624, Revision 01, dated March 
29, 2017.

(l) 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 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.

(m) Related Information

    (1) Refer to Mandatory Continuing Airworthiness Information 
(MCAI) Canadian AD CF-2018-19, dated July 20, 2018, 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-2019-0024.
    (2) For more information about this AD, contact Aziz Ahmed, 
Aerospace Engineer, FAA, New York ACO Branch, 1600 Stewart Avenue, 
Suite 410, Westbury, New York 11590; telephone: 516-287-7329; 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 (n)(3) and (n)(4) of this AD.

(n) 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 Service Bulletin 601-0624, Revision 02, dated 
January 29, 2018.
    (ii) [Reserved]
    (3) 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.
    (4) 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.
    (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, call 202-741-6030, or go to: http://www.archives.gov/federal-register/cfr/ibr-locations.html.


[[Page 27506]]


    Issued in Des Moines, Washington, on May 29, 2019.
Michael Kaszycki,
Acting Director, System Oversight Division, Aircraft Certification 
Service.
[FR Doc. 2019-12351 Filed 6-12-19; 8:45 am]
 BILLING CODE 4910-13-P

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