Proposed Rule2023-00062
Airworthiness Directives; Bombardier, Inc., Airplanes
Primary source
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Published
January 12, 2023
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
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 multiple 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. This proposed AD would require a records check and replacement of affected left-hand (LH) direct current power center (DCPC) units. The FAA is proposing this AD to address the unsafe condition on these products.
Full Text
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<title>Federal Register, Volume 88 Issue 8 (Thursday, January 12, 2023)</title>
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[Federal Register Volume 88, Number 8 (Thursday, January 12, 2023)]
[Proposed Rules]
[Pages 2029-2032]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2023-00062]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2022-1662; Project Identifier MCAI-2022-00689-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 multiple reports of
[[Page 2030]]
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. This proposed AD would require a records
check and replacement of affected left-hand (LH) direct current power
center (DCPC) units. 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 February
27, 2023.
ADDRESSES: You may send comments, using the procedures found in 14 CFR
11.43 and 11.45, by any of the following methods:
<bullet> Federal eRulemaking Portal: Go to <a href="http://regulations.gov">regulations.gov</a>. Follow
the instructions for submitting comments.
<bullet> Fax: 202-493-2251.
<bullet> 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.
<bullet> Hand Delivery: Deliver to Mail address above between 9
a.m. and 5 p.m., Monday through Friday, except Federal holidays.
AD Docket: You may examine the AD docket at <a href="http://regulations.gov">regulations.gov</a> under
Docket No. FAA-2022-1662; 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 mandatory continuing airworthiness
information (MCAI), any comments received, and other information. The
street address for Docket Operations is listed above.
Material Incorporated by Reference:
<bullet> For Bombardier service information identified in this
NPRM, contact Bombardier Business Aircraft Customer Response Center,
400 C[ocirc]te-Vertu Road West, Dorval, Qu[eacute]bec H4S 1Y9, Canada;
telephone 514-855-2999; email <a href="/cdn-cgi/l/email-protection#e78684c99e928ba786829588c9db86c78f958281da" http: bombardier.com">bombardier.com</a>">ac.yul@aero.<a href="http://bombardier.com">bombardier.com</a></a>; website
<a href="http://bombardier.com">bombardier.com</a>.
<bullet> 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.
FOR FURTHER INFORMATION CONTACT: Steven Dzierzynski, Aerospace
Engineer, Avionics & Electrical Systems Section, FAA, New York ACO
Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone
516-228-7367; email <a href="/cdn-cgi/l/email-protection#c8f1e5a9bebbe5a6b1a9aba7e5aba7bb88aea9a9e6afa7be"><span class="__cf_email__" data-cfemail="41786c2037326c2f3820222e6c222e32012720206f262e37">[email protected]</span></a>.
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-2022-1662; Project Identifier
MCAI-2022-00689-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
<a href="http://regulations.gov">regulations.gov</a>, 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 & Electrical Systems
Section, FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410,
Westbury, NY 11590; telephone 516-228-7367; email <a href="/cdn-cgi/l/email-protection#88b1a5e9fefba5e6f1e9ebe7a5ebe7fbc8eee9e9a6efe7fe"><span class="__cf_email__" data-cfemail="dbe2f6baada8f6b5a2bab8b4f6b8b4a89bbdbabaf5bcb4ad">[email protected]</span></a>. 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, which is the aviation authority for Canada, has
issued Transport Canada AD CF-2022-28, dated June 9, 2022 (Transport
Canada AD CF-2022-28) (also referred to after this as the MCAI), to
correct an unsafe condition on certain Bombardier, Inc., Model BD-100-
1A10 airplanes. The MCAI states there have been multiple reports of
erratic electrical system status on the PBAs and the EICAS while on-
ground and during flight, and in several cases, leading to momentary
loss of electrical power and loss of flight displays following flight
crew responses to the erratic statuses. It was found that airplanes
could experience misleading electrical system status indications (PBA
and EICAS) as a result of contamination of electrical contacts in the
LH DCPC internal communication data bus. Those erratic indications
could cause the crew to turn off fully-operational 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.
The MCAI also stated that Transport Canada previously issued CF-
2020-46, dated November 17, 2020 (which corresponds to FAA AD 2021-23-
14, Amendment 39-21812 (86 FR 68889, December 6, 2021)), which mandated
the use of revised Electrical Emergency and Non-Normal Procedures in
the airplane flight manual that directed crews not to turn off active
generators in the event of an erroneous electrical system status
indication. The MCAI advised that further corrective action is being
developed to introduce a design improvement to the DCPC that is
intended to protect the internal communication data bus from
contaminants, and that a time-limited maintenance check will also be
implemented.
You may examine the MCAI in the AD docket at <a href="http://regulations.gov">regulations.gov</a> under
Docket No. FAA-2022-1662.
Related Service Information Under 1 CFR Part 51
The FAA reviewed Bombardier Service Bulletins 100-24-29 and 350-24-
004, both dated April 9, 2021. This service information specifies
procedures for a records check to determine the total flight hours and
replacement of affected LH DCPC units (part numbers 975GC02Y04,
975GC0Y05, 975GC02Y06, or 975GC02Y07). 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
[[Page 2031]]
country, and is approved for operation in the United States. Pursuant
to the FAA's bilateral agreement with this State of Design Authority,
it has notified the FAA of the unsafe condition described in the MCAI
and service information described above. The FAA is issuing this NPRM
after determining that 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 accomplishing the actions specified
in the service information already described, except as discussed under
``Differences Between this NPRM and the MCAI or Service Information.''
Differences Between This NPRM and the MCAI or Service Information
The note to paragraph 2.B.(4) in Bombardier Service Bulletins 100-
24-29 and 350-24-004, both dated April 9, 2021, specifies to reset the
unit total flight hours to zero at date of incorporation. This proposed
AD would not require that action.
Interim Action
The FAA considers that this proposed AD would be an interim action.
The MCAI states that further corrective action is being developed. Once
this action is developed, approved, and available, the FAA might
consider additional rulemaking.
Costs of Compliance
The FAA estimates that this AD, if adopted as proposed, would
affect 315 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-hours x $85 per hour = $85............................ $0 $85 $26,775
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The FAA estimates the following costs to do any necessary on-
condition actions that would be required based on the results of any
required actions. The FAA has no way of determining the number of
aircraft that might need this on-condition action:
Estimated Costs of On-Condition Actions
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Labor cost Parts cost Cost per product
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8 work-hours x $85 per hour = Up to $35,000...... Up to $35,680.
$680.
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The FAA has included all known costs in its cost estimate.
According to the manufacturer, however, some or all of the costs of
this proposed AD may be covered under warranty, thereby reducing the
cost impact on affected operators.
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-2022-1662; Project Identifier MCAI-
2022-00689-T.
(a) Comments Due Date
The FAA must receive comments on this airworthiness directive
(AD) by February 27, 2023.
(b) Affected ADs
None.
(c) Applicability
This AD applies to Bombardier, Inc., Model BD-100-1A10
airplanes, certificated in any category, having serial number 20003
through 20795 inclusive, 20797 through 20812 inclusive, 20814
through 20832 inclusive, and 20834 through 20836 inclusive.
[[Page 2032]]
(d) Subject
Air Transport Association (ATA) of America Code 24, Electrical
Power.
(e) Unsafe Condition
This AD was prompted by multiple 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 erratic
indications, which could cause the flight crew to turn off fully-
operational electrical power sources, leading to partial or complete
loss of electrical power. The unsafe condition, if not addressed,
could result in 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) Records Check
Within 60 days after the effective date of this AD, verify the
total flight hours of the left-hand (LH) direct current power center
(DCPC) unit since the date of manufacture by doing a records check
in accordance with paragraph 2.B.(1) of the Accomplishment
Instructions of the applicable service bulletin identified in
paragraphs (g)(1) and (2) of this AD.
(1) For airplanes having serial number 20001 through 20500
inclusive, use Bombardier Service Bulletin 100-24-29, dated April 9,
2021.
(2) For airplanes having serial number 20501 through 20999
inclusive, use Bombardier Service Bulletin 350-24-004, dated April
9, 2021.
(h) Replacement of the LH DCPC
If, during the records check required by paragraph (g) of this
AD, the total flight hours since date of manufacture of the LH DCPC
unit is equal to or more than 3,100 total flight hours and the LH
DCPC has not been cleaned as specified in Safran Service Bulletin
975GC02Y-24-018 before the effective date of this AD: Within 19
months after the effective date of this AD, replace the LH DCPC unit
in accordance with paragraphs 2.B.(2) through 2.B.(5) and 2.C. of
the Accomplishment Instructions of the applicable service bulletin
identified in paragraphs (g)(1) and (2) of this AD.
(i) Exception to the Service Information
Although the note in paragraph 2.B.(4) of the Accomplishment
Instructions of Bombardier Service Bulletins 100-24-29, and 350-24-
004, both dated April 9, 2021, specifies that actions will reset
``the unit total flight hours to zero at date of incorporation,''
this AD does not include that requirement.
(j) Additional 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 New York ACO
Branch, mail it to ATTN: Program Manager, Continuing Operational
Safety, at the address identified in paragraph (k)(1) of this AD or
email to: <a href="/cdn-cgi/l/email-protection#8db4a0ecfbfea0e3f4eceee2a0eee2fecdebececa3eae2fb"><span class="__cf_email__" data-cfemail="a99084c8dfda84c7d0c8cac684cac6dae9cfc8c887cec6df">[email protected]</span></a>. If mailing information, also
submit information by email. 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; or Bombardier, Inc.'s Transport
Canada Design Approval Organization (DAO). If approved by the DAO,
the approval must include the DAO-authorized signature.
(k) Additional Information
(1) Refer to Transport Canada AD CF-2022-28, dated May 26, 2022,
for related information. This Transport Canada AD may be found in
the AD docket at <a href="http://regulations.gov">regulations.gov</a> under Docket No. FAA-2022-1662.
(2) For more information about this AD, contact Steven
Dzierzynski, Aerospace Engineer, Avionics & Electrical Systems
Section, FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410,
Westbury, NY 11590; telephone 516-228-7367; email <a href="/cdn-cgi/l/email-protection#655c48041316480b1c04060a48060a16250304044b020a13"><span class="__cf_email__" data-cfemail="ac9581cddadf81c2d5cdcfc381cfc3dfeccacdcd82cbc3da">[email protected]</span></a>.
(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 100-24-29, dated April 9, 2021.
(ii) Bombardier Service Bulletin 350-24-004, dated April 9,
2021.
(3) For Bombardier service information identified in this AD,
contact Bombardier Business Aircraft Customer Response Center, 400
C[ocirc]te-Vertu Road West, Dorval, Qu[eacute]bec H4S 1Y9, Canada;
telephone 514-855-2999; email <a href="/cdn-cgi/l/email-protection#0b6a6825727e674b6a6e796425376a2b63796e6d36" http: bombardier.com">bombardier.com</a>">ac.yul@aero.<a href="http://bombardier.com">bombardier.com</a></a>; website
<a href="http://bombardier.com">bombardier.com</a>.
(4) 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.
(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, email <a href="/cdn-cgi/l/email-protection#f89e8ad691968b889d9b8c919796b896998a99d69f978e"><span class="__cf_email__" data-cfemail="98feeab6f1f6ebe8fdfbecf1f7f6d8f6f9eaf9b6fff7ee">[email protected]</span></a>, or go to: <a href="http://www.archives.gov/federal-register/cfr/ibr-locations.html">www.archives.gov/federal-register/cfr/ibr-locations.html</a>.
Issued on January 2, 2023.
Christina Underwood,
Acting Director, Compliance & Airworthiness Division, Aircraft
Certification Service.
[FR Doc. 2023-00062 Filed 1-11-23; 8:45 am]
BILLING CODE 4910-13-P
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