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Federal Register / Vol. 86, No. 171 / Wednesday, September 8, 2021 / Proposed Rules
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., 200 Cote-Vertu Road West, Dorval, Quebec H4S 2A3, Canada; North America toll-free telephone 1866538
1247 or direct-dial telephone 1514
8552999; email ac.yul@
aero.bombardier.com; 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 2062313195.
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. FAA2021
0725; 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, any comments received, and other information. The street address for Docket Operations is listed above.
FOR FURTHER INFORMATION CONTACT:
Steven Dzierzynski, Aerospace Engineer, Avionics and Electrical Systems Section, FAA, New York ACO
Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 5162287367; fax 5167945531; email 9-avs-nyaco-cos@faa.gov.
SUPPLEMENTARY INFORMATION:

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Comments Invited The FAA invites you to send any written relevant data, views, or arguments about this proposal. Send your comments to an address listed under ADDRESSES. Include Docket No.
FAA20210725; Project Identifier MCAI202001402T at the beginning of your comments. The most helpful comments reference a specific portion of the proposal, explain the reason for any recommended change, and include supporting data. The FAA will consider all comments received by the closing date and may amend the proposal because of those comments.
Except for Confidential Business Information CBI as described in the following paragraph, and other information as described in 14 CFR
11.35, the FAA will post all comments received, without change, to https
www.regulations.gov, including any personal information you provide. The agency will also post a report summarizing each substantive verbal
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contact received about this proposed AD.
Confidential Business Information CBI is commercial or financial information that is both customarily and actually treated as private by its owner.
Under the Freedom of Information Act FOIA 5 U.S.C. 552, CBI is exempt from public disclosure. If your comments responsive to this NPRM
contain commercial or financial information that is customarily treated as private, that you actually treat as private, and that is relevant or responsive to this NPRM, it is important that you clearly designate the submitted comments as CBI. Please mark each page of your submission containing CBI
as PROPIN. The FAA will treat such marked submissions as confidential under the FOIA, and they will not be placed in the public docket of this NPRM. Submissions containing CBI
should be sent to Steven Dzierzynski, Aerospace Engineer, Avionics and Electrical Systems Section, FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY
11590; telephone 5162287367; fax 5167945531; email 9-avs-nyaco-cos@
faa.gov. Any commentary that the FAA
receives which is not specifically designated as CBI will be placed in the public docket for this rulemaking.
Background The FAA issued AD 20172206, Amendment 3919086 82 FR 49498, October 26, 2017 AD 20172206, for certain Bombardier, Inc., Model CL
6002B16 6013A, 6013R, and 604
Variants airplanes. AD 20172206
requires repetitive inspections for fuel leakage at the engine and APU fuel pumps, and related investigative and corrective actions if necessary. AD
20172206 resulted from reports of fuel leaks in the engine and APU EFP
cartridge/canister electrical connectors and conduits. The FAA issued AD
20172206 to address fuel leaks in certain fuel pumps to remove a potential fuel ignition hazard. FAA AD 201722
06 corresponds to AD CF201632R1, dated October 12, 2016, issued by Transport Canada Civil Aviation TCCA, which is the aviation authority for Canada.
Actions Since AD 20172206 Was Issued The preamble to AD 20172206
explains that the FAA considered the requirements interim action and was considering further rulemaking. The FAA has now determined that further rulemaking is indeed necessary, and
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this proposed AD follows from that determination.
Since the FAA issued AD 201722
06, a general visual inspection of the APU and a modification of the engine EFP installation have been developed to address the root cause of the fuel leaks and provide terminating action for the repetitive general visual inspections and rectifications of fuel leaks from the engine and APU EFP electrical wiring conduit outlets. In addition, it was determined that additional airplanes are affected by the unsafe condition.
TCCA has issued TCCA AD CF2016
32R4, dated October 13, 2020 TCCA AD
CF201632R4; and TCCA AD CF
202038, dated October 13, 2020 TCCA
AD CF202038; to correct an unsafe condition for certain Bombardier, Inc., Model CL6002B16 6013A, 6013R, and 604 Variants airplanes. This proposed AD refers to the TCCA ADs as the Mandatory Continuing Airworthiness Information, or the MCAI. You may examine the MCAI in the AD docket on the internet at https
www.regulations.gov by searching for and locating Docket No. FAA2021
0725.
This proposed AD was prompted by reports of fuel leaks from the electrical connectors and conduits of the engine and APU EFP cartridge/canister, and additional actions have been developed to address the root cause of the fuel leaks. The FAA is proposing this AD to address the potential for a fire hazard as a result of fuel leak from the APU EFP
electrical conduit in the hot landing light compartment. See the TCCA ADs for additional background information.
Related Service Information Under 1
CFR Part 51
Bombardier has issued the following service information, which describes procedures for repetitive general visual inspections and rectifications for any fuel leak from the engine and APU EFP
electrical wiring conduit outlets. These documents are distinct since they apply to different airplane serial numbers.
Bombardier Service Bulletin 604
28022, Revision 3, dated August 31, 2018.
Bombardier Service Bulletin 605
28010, Revision 3, dated August 31, 2018.
Bombardier Service Bulletin 650
28001, Revision 3, dated January 3, 2019.
Bombardier has also issued the following service information, which describes procedures for a detailed visual inspection of the APU for any damage or deformations e.g., cut wires and a broken harness assembly of the fuel boost pump connector, modifying
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