[Federal Register Volume 86, Number 160 (Monday, August 23, 2021)]
[Proposed Rules]
[Pages 47036-47038]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2021-17943]



[[Page 47036]]

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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2021-0691; Project Identifier MCAI-2020-01542-T]
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: The FAA proposes to adopt a new airworthiness directive (AD) 
for certain Bombardier, Inc., Model BD-100-1A10 airplanes. This 
proposed AD was prompted by reports of erratic electrical system status 
on the push button annunciators (PBAs) and the engine instrument and 
crew alerting system (EICAS). This proposed AD would require revising 
the existing airplane flight manual (AFM) and applicable corresponding 
operational procedures to incorporate procedures to be applied during 
erroneous electrical status indication conditions. The FAA is proposing 
this AD to address the unsafe condition on these products.

DATES: The FAA must receive comments on this proposed AD by October 7, 
2021.

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 https://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., 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 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.

Examining the AD Docket

    You may examine the AD docket at https://www.regulations.gov by 
searching for and locating Docket No. FAA-2021-0691; 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 
516-228-7367; fax 516-794-5531; email [email protected].

SUPPLEMENTARY INFORMATION:

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. FAA-2021-0691; Project Identifier 
MCAI-2020-01542-T'' 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 contact received about this NPRM.

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 516-228-7367; fax 516-794-5531; email [email protected]. Any commentary that the FAA receives which is 
not specifically designated as CBI will be placed in the public docket 
for this rulemaking.

Background

    Transport Canada Civil Aviation (TCCA), which is the aviation 
authority for Canada, has issued TCCA AD CF-2020-46, dated November 17, 
2020 (TCCA AD CF-2020-46) (also referred to after this as the Mandatory 
Continuing Airworthiness Information, or the MCAI), to correct an 
unsafe condition for certain Bombardier, Inc., Model BD-100-1A10 
airplanes. You may examine the MCAI in the AD docket at https://www.regulations.gov by searching for and locating Docket No. FAA-2021-
0691.
    This proposed AD was prompted by reports of erratic electrical 
system status on the PBA and the EICAS, while on-ground and during 
flight. Some of those incidents resulted in the airplane experiencing 
momentary loss of electrical power and loss of flight displays 
following flightcrew actions. The FAA is proposing this AD to address 
erroneous indications that could mislead pilots, causing them to turn 
off active electrical power sources, leading to partial or complete 
loss of electrical power. Loss of electrical power could result in the 
loss of flight displays and reduced controllability of the airplane. 
See the MCAI for additional background information.

Related Service Information Under 1 CFR Part 51

    Bombardier has issued the following sections of the applicable 
AFMs. This service information provides procedures to inform the pilots 
not to turn off active generators in the event of an erroneous 
electrical status indication.
     Section 03-19, Electrical, of Chapter 03, Emergency 
Procedures, of the Bombardier Challenger 300 (Imperial Version) 
Airplane Flight Manual, Publication No. CSP 100-1, Revision 63, dated 
April 1, 2021. (For obtaining this section of the Bombardier Challenger 
300 (Imperial Version) Airplane Flight Manual, Publication No. CSP 100-
1, use Document Identification No. CH 300 AFM-I.)
     Section 05-19, Electrical, of Chapter 05, Non-Normal 
Procedures, of

[[Page 47037]]

the Bombardier Challenger 300 (Imperial Version) Airplane Flight 
Manual, Publication No. CSP 100-1, Revision 63, dated April 1, 2021. 
(For obtaining this section of the Bombardier Challenger 300 (Imperial 
Version) Airplane Flight Manual, Publication No. CSP 100-1, use 
Document Identification No. CH 300 AFM-I.)
     Section 03-19, Electrical, of Chapter 03, Emergency 
Procedures, of the Bombardier Challenger 350 Airplane Flight Manual, 
Publication No. CH 350 AFM, Revision 29, dated April 1, 2021.
     Section 05-19, Electrical, of Chapter 05, Non-Normal 
Procedures, of the Bombardier Challenger 350 Airplane Flight Manual, 
Publication No. CH 350 AFM, Revision 29, dated April 1, 2021.
    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.

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 the FAA's bilateral agreement with the State of Design Authority, 
the FAA has been notified of the unsafe condition described in the MCAI 
and service information referenced above. The FAA is proposing this AD 
because the FAA 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 AD Requirements in This NPRM

    This proposed AD would require revising the existing AFM and 
applicable corresponding operational procedures to incorporate 
procedures to be applied during erroneous electrical status indication 
conditions.

Explanation of Incorporating Information Specified in an AFM Revision

    This proposed AD would require including the information that is 
provided in the referenced AFM revisions in paragraph (g) of this 
proposed AD. The language in paragraph (g) of this proposed AD is 
designed to allow incorporating the specific information, regardless of 
the revision level of the AFM in use, provided the language is 
identical to the referenced AFM revisions specified in paragraph (g) of 
this proposed AD. The language in a later revision of the Bombardier 
Challenger 300 (Imperial Version) Airplane Flight Manual, Publication 
No. CSP 100-1 that is the same as the language in Bombardier Challenger 
300 (Imperial Version) Airplane Flight Manual, Publication No. CSP 100-
1, Revision 63, dated April 1, 2021; or in a later revision of the 
Bombardier Challenger 350 Airplane Flight Manual, Publication No. CH 
350 AFM that is the same as the language in Bombardier Challenger 350 
Airplane Flight Manual, Publication No. CH 350 AFM, Revision 29, dated 
April 1, 2021; may be incorporated.

Costs of Compliance

    The FAA estimates that this AD, if adopted as proposed, would 
affect 275 airplanes of U.S. registry. The FAA estimates the following 
costs to comply with this proposed AD:

                                      Estimated Costs for Required Actions
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                                                                                    Cost per       Cost on U.S.
                          Labor cost                              Parts cost        product         operators
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1 work-hour x $85 per hour = $85.............................              $0              $85          $23,375
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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

    The FAA 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) Would not affect intrastate aviation in Alaska, and
    (3) Would 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:

Bombardier, Inc.: Docket No. FAA-2021-0691; Project Identifier MCAI-
2020-01542-T.

(a) Comments Due Date

    The FAA must receive comments on this airworthiness directive 
(AD) by October 7, 2021.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to Bombardier, Inc., Model BD-100-1A10 
airplanes, certificated in any category, serial numbers 20003 and 
subsequent.

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(d) Subject

    Air Transport Association (ATA) of America Code 24, Electrical 
power.

(e) Unsafe Condition

    This AD was prompted by reports of erratic electrical system 
status on the push button annunciators (PBAs) and the engine 
instrument and crew alerting system (EICAS), while on-ground and 
during flight. The FAA is issuing this AD to address erroneous 
indications that could mislead pilots, causing them to turn off 
active electrical power sources, leading to partial or complete loss 
of electrical power. Loss of electrical power could result in the 
loss of flight displays and reduced controllability of the airplane.

(f) Compliance

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

(g) Revision of the Airplane Flight Manual (AFM)

    Within 60 days after the effective date of this AD: Revise the 
Emergency Procedures and Non-Normal Procedures sections of the 
existing AFM and applicable corresponding operational procedures to 
include the information in Section 03-19, Electrical, of Chapter 03, 
Emergency Procedures, and Section 05-19, Electrical, of Chapter 05, 
Non-Normal Procedures, of the Bombardier Challenger 300 (Imperial 
Version) Airplane Flight Manual, Publication No. CSP 100-1, Revision 
63, dated April 1, 2021 (for airplanes having serial numbers 20003 
through 20500 inclusive); or Bombardier Challenger 350 Airplane 
Flight Manual, Publication No. CH 350 AFM, Revision 29, dated April 
1, 2021 (for airplanes having serial numbers 20501 through 20999 
inclusive); as applicable.
    Note 1 to paragraph (g): For obtaining the sections for 
Bombardier Challenger 300 (Imperial Version) Airplane Flight Manual, 
Publication No. CSP 100-1, use Document Identification No. CH 300 
AFM-I.

(h) 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 Section 03-19, Electrical, of Chapter 03, 
Emergency Procedures, and Section 05-19, Electrical, of Chapter 05, 
Non-Normal Procedures, of the Bombardier Challenger 300 (Imperial 
Version) Airplane Flight Manual, Publication No. CSP 100-1, Revision 
62, dated December 22, 2020; or Bombardier Challenger 350 Airplane 
Flight Manual, Publication No. CH 350 AFM, Revision 28, dated 
December 22, 2020; as applicable.
    Note 2 to paragraph (h): For obtaining the sections for 
Bombardier Challenger 300 (Imperial Version) Airplane Flight Manual, 
Publication No. CSP 100-1, use Document Identification No. CH 300 
AFM-I.

(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 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-2020-46, dated November 17, 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-2021-0691.
    (2) For more information about this AD, contact Steven 
Dzierzynski, Aerospace Engineer, Avionics and Electrical Systems 
Section, FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410, 
Westbury, NY 11590; telephone 516-228-7367; fax 516-794-5531; email 
[email protected].
    (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 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.

    Issued on August 17, 2021.
Gaetano A. Sciortino,
Deputy Director for Strategic Initiatives, Compliance & Airworthiness 
Division, Aircraft Certification Service.
[FR Doc. 2021-17943 Filed 8-20-21; 8:45 am]
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