Document ID: FAA-2018-0275-0004
Agency: faa
Document Type: Rule
Title: Airworthiness Directives: Bombardier, Inc., Airplanes
Posted Date: 2018-07-09T04:00Z

[Federal Register Volume 83, Number 131 (Monday, July 9, 2018)]
[Rules and Regulations]
[Pages 31643-31645]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2018-14501]

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 Rules and Regulations
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  Federal Register / Vol. 83, No. 131 / Monday, July 9, 2018 / Rules 
and Regulations  

[[Page 31643]]

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2018-0275; Product Identifier 2018-NM-011-AD; Amendment 
39-19323; AD 2018-14-03]
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-600-2C10 (Regional Jet Series 700, 701, & 
702) airplanes; Model CL-600-2D15 (Regional Jet Series 705) airplanes; 
Model CL-600-2D24 (Regional Jet Series 900) airplanes; and Model CL-
600-2E25 (Regional Jet Series 1000) airplanes. This AD was prompted by 
reports indicating that corrosion was found on the main landing gear 
(MLG) retraction actuator brackets and their associated pins. This AD 
requires an inspection of the retraction actuator brackets, their 
associated pins and hardware, and the mating lugs on the MLG outer 
cylinder for any corrosion, and replacement if necessary. We are 
issuing this AD to address the unsafe condition on these products.

DATES: This AD is effective August 13, 2018.
    The Director of the Federal Register approved the incorporation by 
reference of a certain publication listed in this AD as of August 13, 
2018.

ADDRESSES: For service information identified in this final rule, 
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, 2200 South 216th 
St., Des Moines, WA. For information on the availability of this 
material at the FAA, call 206-231-3195. It is also available on the 
internet at http://www.regulations.gov by searching for and locating 
Docket No. FAA-2018-0275.

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-
0275; 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 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 516-228-7329; 
fax 516-794-5531.

SUPPLEMENTARY INFORMATION:

Discussion

    We issued an NPRM to amend 14 CFR part 39 by adding an AD that 
would apply to certain Bombardier, Inc., Model CL-600-2C10 (Regional 
Jet Series 700, 701, & 702) airplanes; Model CL-600-2D15 (Regional Jet 
Series 705) airplanes; Model CL-600-2D24 (Regional Jet Series 900) 
airplanes; and Model CL-600-2E25 (Regional Jet Series 1000) airplanes. 
The NPRM published in the Federal Register on April 13, 2018 (83 FR 
16015). The NPRM was prompted by reports indicating that corrosion was 
found on the MLG retraction actuator brackets and their associated 
pins. The NPRM proposed to require inspection of the retraction 
actuator brackets, their associated pins and hardware, and the mating 
lugs on the MLG outer cylinder for any corrosion, and replacement if 
necessary.
    We are issuing this AD to address undetected corrosion on the MLG 
retraction actuator brackets and their associated pins, which could 
lead to a MLG collapse.
    Transport Canada Civil Aviation (TCCA), which is the aviation 
authority for Canada, has issued Canadian AD CF-2017-34, dated October 
19, 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-600-2C10 (Regional Jet 
Series 700, 701, & 702) airplanes; Model CL-600-2D15 (Regional Jet 
Series 705) airplanes; Model CL-600-2D24 (Regional Jet Series 900) 
airplanes; and Model CL-600-2E25 (Regional Jet Series 1000) airplanes. 
The MCAI states:

    There have been in-service reports of corrosion on the main 
landing gear (MLG) retraction actuator bracket and its associated 
pins. Bombardier's investigation determined that the corrosion is 
the consequence of inadequate corrosion protection being applied 
during production. Undetected corrosion on the MLG retraction 
actuator bracket and its associated pins could result in a MLG 
collapse.
    This [Canadian] AD mandates the inspection of the MLG retraction 
actuator bracket, its associated pins and hardware, and the mating 
lugs on the MLG outer cylinder for corrosion. This [Canadian] AD 
also mandates the replacement of corroded MLG parts and the 
application of corrosion protection in order to mitigate the risk of 
MLG collapse.

    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-
0275.

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:
     Are consistent with the intent that was proposed in the 
NPRM for addressing the unsafe condition; and

[[Page 31644]]

     Do not add any additional burden upon the public than was 
already proposed in the NPRM.

Related Service Information Under 1 CFR part 51

    Bombardier has issued Service Bulletin 670BA-32-060, Revision B, 
dated November 10, 2017. The service information describes a detailed 
visual inspection of the retraction actuator brackets, their associated 
pins and hardware, and the mating lugs on the MLG outer cylinder for 
any corrosion, and replacement if necessary. 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 541 airplanes of U.S. registry.
    We estimate the following costs to comply with this AD:

                                                 Estimated Costs
----------------------------------------------------------------------------------------------------------------
                                                                                  Cost per        Cost on U.S.
               Action                        Labor cost          Parts cost        product         operators
----------------------------------------------------------------------------------------------------------------
Inspection..........................  16 work-hours x $85 per              $0          $1,360           $735,760
                                       hour = $1,360.
----------------------------------------------------------------------------------------------------------------

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

                                               On-Condition Costs
----------------------------------------------------------------------------------------------------------------
              Action                       Labor cost              Parts cost             Cost per product
----------------------------------------------------------------------------------------------------------------
Replacement......................  1 work-hour x $85 per      Up to $75,790.......  Up to $75,875
                                    hour = $85.
----------------------------------------------------------------------------------------------------------------

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):

2018-14-03 Bombardier, Inc.: Amendment 39-19323; Docket No. FAA-
2018-0275; Product Identifier 2018-NM-011-AD.

(a) Effective Date

    This AD is effective August 13, 2018.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to Bombardier, Inc., Model airplanes, 
certificated in any category, identified in paragraphs (c)(1), 
(c)(2), and (c)(3) of this AD.
    (1) Model CL-600-2C10 (Regional Jet Series 700, 701, & 702) 
airplanes, serial numbers 10002 and subsequent.
    (2) Model CL-600-2D15 (Regional Jet Series 705) airplanes and 
Model CL-600-2D24 (Regional Jet Series 900) airplanes, serial 
numbers 15001 and subsequent.
    (3) Model CL-600-2E25 (Regional Jet Series 1000) airplanes, 
serial numbers 19001 and subsequent.

(d) Subject

    Air Transport Association (ATA) of America Code 32, Landing 
gear.

(e) Reason

    This AD was prompted by reports indicating that corrosion was 
found on the main landing gear (MLG) retraction actuator brackets 
and their associated pins. We are issuing this AD to address 
undetected corrosion on the MLG retraction actuator brackets and 
their associated pins, which could lead to a MLG collapse.

[[Page 31645]]

(f) Compliance

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

 (g) Inspection and Replacement

    For any MLG dressed shock strut assembly with part numbers and 
serial numbers specified in paragraph 1.A., ``Effectivity,'' of 
Bombardier Service Bulletin 670BA-32-060, Revision B, dated November 
10, 2017, at the applicable compliance times specified in paragraphs 
(g)(1), (g)(2), or (g)(3) of this AD, do a detailed visual 
inspection of the retraction actuator brackets, their associated 
pins and hardware, and the mating lugs on the MLG outer cylinder for 
any corrosion, and do all applicable replacements, in accordance 
with the Accomplishment Instructions of Bombardier Service Bulletin 
670BA-32-060, Revision B, dated November 10, 2017. Do all applicable 
replacements before further flight.
    (1) For any MLG dressed shock strut assembly that has 
accumulated less than 10,000 total flight hours on the MLG dressed 
shock strut assembly and has been in service for less than 60 months 
since its first installation on an airplane: Within 6,600 flight 
hours or 39 months, whichever occurs first, after the effective date 
of this AD.
    (2) For any MLG dressed shock strut assembly that has 
accumulated less than or equal to 14,000 total flight hours on the 
MLG dressed shock strut assembly, and has been in service for less 
than 84 months since its first installation on an airplane, and does 
not meet the criteria in paragraph (g)(1) of this AD: Within 4,400 
flight hours or 26 months, whichever occurs first, after the 
effective date of this AD, but not to exceed 16,600 total flight 
hours on the MLG dressed shock strut assembly or 99 months since its 
first installation on an airplane, whichever occurs first.
    (3) For any MLG dressed shock strut assembly that has 
accumulated more than 14,000 total flight hours on the MLG dressed 
shock strut assembly or 84 months or more since its first 
installation on an airplane: Within 2,600 flight hours or 15 months, 
whichever occurs first, after the effective date of this AD.

(h) Parts Exempted From This AD

    For any MLG dressed shock strut assembly with part numbers and 
serial numbers specified in paragraph 1.A., ``Effectivity,'' of 
Bombardier Service Bulletin 670BA-32-060, Revision B, dated November 
10, 2017: The actions specified in paragraph (g) of this AD are not 
required provided that the actions in paragraphs (h)(1), (h)(2), or 
(h)(3) of this AD have been done.
    (1) The actions in paragraphs (h)(1)(i), (h)(1)(ii), 
(h)(1)(iii), and (h)(1)(iv) of this AD, as applicable, have been 
done on the MLG dressed shock strut assembly since its entry-into-
service date.
    (i) Airplane Maintenance Manual (AMM) Task 32-32-05-400-803, 
Installation of the Outboard MLG Retraction Actuator Bracket Pin, or 
equivalent task in Component Maintenance Manual (CMM) 32-11-05 (for 
Model CL-600-2C10 (Regional Jet Series 700, 701, & 702) airplanes), 
or CMM 32-11-06 (for Model CL-600-2D15 (Regional Jet Series 705) 
airplanes and Model CL-600-2D24 (Regional Jet Series 900) 
airplanes), or CMM 32-11-34 (for Model CL-600-2E25 (Regional Jet 
Series 1000) airplanes); and
    (ii) AMM Task 32-32-05-400-804, Installation of the Inboard MLG 
Retraction-Actuator Bracket Pin, or equivalent task in CMM 32-11-05 
(for Model CL-600-2C10 (Regional Jet Series 700, 701, & 702) 
airplanes), or CMM 32-11-06 (for Model CL-600-2D15 (Regional Jet 
Series 705) airplanes and Model CL-600-2D24 (Regional Jet Series 
900) airplanes), or CMM 32-11-34 (for Model CL-600-2E25 (Regional 
Jet Series 1000) airplanes); and
    (iii) AMM Task 32-32-05-400-805, Installation of the Inboard-MLG 
Retraction-Actuator Pin, or AMM Task 32-32-05-400-801, Installation 
of the MLG Retraction-Actuator, or AMM Task 32-11-05-400-801, 
Installation of the MLG Shock-Strut Assembly; and
    (iv) For Model CL-600-2C10 (Regional Jet Series 700, 701, & 702) 
airplanes, Model CL-600-2D15 (Regional Jet Series 705) airplanes, 
and Model CL-600-2D24 (Regional Jet Series 900) airplanes equipped 
with MLG auxiliary actuators: AMM Task 32-32-03-400-801, 
Installation of the MLG Auxiliary Actuator, or AMM Task 32-11-05-
400-801, Installation of the MLG Shock-Strut Assembly.
    (2) AMM Task 32-32-05-400-806, Installation of the MLG 
Retraction-Actuator Bracket has been accomplished on the MLG dressed 
shock strut assembly since its entry-into-service date.
    (3) AMM Task 32-11-00-610-801, Restoration (Overhaul) of the MLG 
Assembly has been accomplished on the MLG dressed shock strut 
assembly since its entry-into-service date.

(i) Credit for Previous Actions

    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 670BA-32-060, 
dated May 2, 2017, or Bombardier Service Bulletin 670BA-32-060, 
Revision A, dated June 22, 2017.

(j) 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.

(k) Related Information

    (1) Refer to Mandatory Continuing Airworthiness Information 
(MCAI) Canadian AD CF-2017-34, dated October 19, 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-2018-0275.
    (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 516-228-7329; fax 516-794-5531.
    (3) Service information identified in this AD that is not 
incorporated by reference is available at the addresses specified in 
paragraphs (l)(3) and (l)(4) of this AD.

(l) 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 670BA-32-060, Revision B, dated 
November 10, 2017.
    (ii) Reserved.
    (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 1-866-538-1247 or direct-dial 
telephone 1-514-855-2999; fax 514-855-7401; 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.

    Issued in Des Moines, Washington, on June 26, 2018.
Jeffrey E. Duven,
Director, System Oversight Division, Aircraft Certification Service.
[FR Doc. 2018-14501 Filed 7-6-18; 8:45 am]
 BILLING CODE 4910-13-P