[Federal Register Volume 84, Number 93 (Tuesday, May 14, 2019)]
[Proposed Rules]
[Pages 21273-21276]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2019-09643]



[[Page 21273]]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2019-0186; Product Identifier 2018-NM-153-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 all 
Bombardier, Inc., Model CL-600-2B16 (601-3A, 601-3R, and 604 Variants) 
airplanes. This proposed AD was prompted by a report that main landing 
gear (MLG) side stay actuators have been assembled using nonconforming 
split ball bearings. This proposed AD would require verification of the 
serial numbers of the installed MLG side stay actuator assemblies, and 
replacement of the affected parts. We are proposing this AD to address 
the unsafe condition on these products.

DATES: We must receive comments on this proposed AD by June 28, 2019.

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, 2200 South 216th St., Des Moines, WA. For 
information on the availability of this material at the FAA, call 206-
231-3195.

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-
0186; 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 NPRM, the regulatory evaluation, any comments received, and other 
information. The street address for Docket Operations (phone: 800-647-
5527) is listed above. Comments will be available in the AD docket 
shortly after receipt.

FOR FURTHER INFORMATION CONTACT: Darren Gassetto, Aerospace Engineer, 
Mechanical Systems and Administrative Services Section, FAA, New York 
ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; 
telephone 516-228-7323; fax 516-794-5531; email [email protected].

SUPPLEMENTARY INFORMATION: 

Comments Invited

    We invite you to send any written relevant data, views, or 
arguments about this proposal. Send your comments to an address listed 
under the ADDRESSES section. Include ``Docket No. FAA-2019-0186; 
Product Identifier 2018-NM-153-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 because 
of 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 AD CF-2018-26, dated October 
5, 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-600-2B16 (601-3A, 601-
3R, and 604 Variants) airplanes. The MCAI states:

    The landing gear supplier has informed Bombardier Inc. about a 
quality escape involving Main Landing Gear (MLG) side stay actuators 
that have been assembled using non-conforming split ball bearings. 
The affected bearings are manufactured from material that does not 
meet the required material properties. If not corrected, this 
condition can result in potentially asymmetric MLG gear extension or 
retraction and subsequent gear collapse during landing.
    This [Canadian] AD mandates verification of the installed MLG 
side stay actuator assemblies and replacement of the affected parts.

    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-
0186.

Related Service Information Under 1 CFR Part 51

    Bombardier has issued the following service information.
     Bombardier Service Bulletin 604-32-029, Revision 02, dated 
May 10, 2018.
     Bombardier Service Bulletin 605-32-006, Revision 02, dated 
May 10, 2018.
     Bombardier Service Bulletin 650-32-002, Revision 02, dated 
May 10, 2018.
    The service information describes procedures to verify the serial 
numbers of the installed MLG side stay actuator assemblies and to 
replace the affected parts. These documents are distinct since they 
apply to the airplane model in different 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.

FAA's Determination

    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 the relevant information and determined the unsafe 
condition described previously is likely to exist or develop on other 
products of the same type design.

Proposed Requirements of This NPRM

    This proposed AD would require accomplishing the actions specified 
in the service information described previously.

Differences Between This Proposed AD and the MCAI or Service 
Information

    The applicability of the MCAI is limited to Bombardier, Inc., Model 
CL-600-2B16 (601-3A, 601-3R, and 604 Variants) airplanes, serial 
numbers 5301 through 5665 inclusive, 5701 through

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5988 inclusive, and 6050 through 6091 inclusive, equipped with MLG side 
stay actuator assembly containing split ball bearing part number 
104467672. However, the applicability of this proposed AD includes all 
Bombardier, Inc., Model CL-600-2B16 (601-3A, 601-3R, and 604 Variants) 
airplanes and prohibits the installation of any MLG side stay actuator 
with a serial number identified in the service information. Because the 
affected part is a rotable part, we have determined that this part 
could later be installed on airplanes that were initially delivered 
with the acceptable part, thereby subjecting those airplanes to the 
unsafe condition. We have coordinated this difference with TCCA.

Costs of Compliance

    We estimate that this proposed AD affects 384 airplanes of U.S. 
registry. We estimate the following costs to comply with this proposed 
AD:

                                      Estimated Costs for Required Actions
----------------------------------------------------------------------------------------------------------------
                                                                                    Cost per       Cost on U.S.
                          Labor cost                              Parts cost        product         operators
----------------------------------------------------------------------------------------------------------------
1 work-hour x $85 per hour = $85.............................              $0              $85          $32,640
----------------------------------------------------------------------------------------------------------------

    We estimate the following costs to do any necessary on-condition 
action 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 this on-condition action:

                 Estimated Costs of On-Condition Actions
------------------------------------------------------------------------
          Labor cost                 Parts cost        Cost per product
------------------------------------------------------------------------
Up to 7 work-hours x $85 per    Up to $1,820.......  Up to $2,415.
 hour = $595.
------------------------------------------------------------------------

    According to the manufacturer, some or all of the costs of this 
proposed AD may be covered under warranty, thereby reducing the cost 
impact on affected individuals. We do not control warranty coverage for 
affected individuals. As a result, we have included all known costs in 
our 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.
    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 and associated appliances 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-2019-0186; Product Identifier 2018-
NM-153-AD.

(a) Comments Due Date

    We must receive comments by June 28, 2019.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to all Bombardier, Inc., Model CL-600-2B16 (601-
3A, 601-3R, and 604 Variants) airplanes, certificated in any 
category.

(d) Subject

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

(e) Reason

    This AD was prompted by a report that main landing gear (MLG) 
side stay actuators have been assembled using nonconforming

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split ball bearings. We are issuing this AD to address the affected 
bearings, which could potentially result in asymmetric MLG gear 
extension or retraction, and subsequent gear collapse during 
landing.

(f) Compliance

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

(g) Inspection to Verify the Serial Number

    For airplane serial numbers 5301 through 5665 inclusive, 5701 
through 5988 inclusive, and 6050 through 6091 inclusive, equipped 
with any MLG side stay actuator assembly containing split ball 
bearing part number (P/N) 104467672: For the left and right MLG side 
stay actuator assemblies having P/Ns 19011-103 and 19011-105, at the 
applicable time specified in figure 2 to paragraph (g) of this AD, 
perform an inspection to verify the serial number, in accordance 
with paragraphs 2.A. and 2.B. of the Accomplishment Instructions of 
the applicable service information specified in figure 1 to 
paragraph (g) of this AD.
BILLING CODE 4910-13-P
[GRAPHIC] [TIFF OMITTED] TP14MY19.130

BILLING CODE 4910-13-C

(h) Replacement

    If, during the inspection specified in paragraph (g) of this AD, 
the identified serial number of the MLG side stay actuator assembly 
is listed in table 1 or table 2 of paragraph 2.B. of the 
Accomplishment Instructions of the applicable service information 
specified in figure 1 to paragraph (g) of this AD: At the applicable 
time specified in figure 2 to paragraph (g) of this AD, replace the 
split ball bearing having P/N 104467672, in accordance with 
paragraph 2.C. of the Accomplishment Instructions of the applicable 
service information specified in figure 1 to paragraph (g) of this 
AD. If the identified serial number of the MLG side stay actuator 
assembly is not listed in table 1 or table 2 of paragraph 2.B. of 
the Accomplishment Instructions of the applicable service 
information specified in figure 1 to paragraph (g) of this AD, no 
further action is required by this paragraph.

(i) Parts Installation Limitation

    As of the effective date of this AD, no person may install, on 
any Bombardier, Inc., Model CL-600-2B16 (601-3A, 601-3R, and 604 
Variants) airplanes, an MLG side stay actuator assembly with a 
serial number listed in table 1 or table 2 of paragraph 2.B. of the 
Accomplishment Instructions of the applicable service information 
specified in figure 1 to paragraph (g) of this AD, unless the split 
ball bearing having P/N 104467672 has been previously replaced as 
specified in paragraph (h) of this AD.

(j) Credit for Previous Actions

    This paragraph provides credit for actions required by 
paragraphs (g) of this AD, if those actions were performed before 
the effective date of this AD using the service information in 
paragraphs (j)(1) through (j)(3) of this AD.
    (1) Bombardier Service Bulletin 604-32-029, Revision 01, dated 
February 5, 2018.
    (2) Bombardier Service Bulletin 605-32-006, Revision 01, dated 
February 5, 2018.
    (3) Bombardier Service Bulletin 650-32-002, Revision 01, dated 
February 5, 2018.

(k) 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

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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.

(l) Related Information

    (1) Refer to Mandatory Continuing Airworthiness Information 
(MCAI) Canadian AD CF-2018-26, dated October 5, 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-2019-0186.
    (2) For more information about this AD, contact Darren Gassetto, 
Aerospace Engineer, Mechanical Systems and Administrative Services 
Section, FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410, 
Westbury, NY 11590; telephone 516-228-7323; fax 516-794-5531; email 
[email protected].
    (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. 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.

    Issued in Des Moines, Washington, on May 3, 2019.
Michael Kaszycki,
Acting Director, System Oversight Division, Aircraft Certification 
Service.
[FR Doc. 2019-09643 Filed 5-13-19; 8:45 am]
 BILLING CODE 4910-13-P