Rule2023-14512
Airworthiness Directives; Bombardier, Inc., Airplanes
Primary source
Metadata and text below are from the Federal Register, a public-domain U.S. government work. Always verify the official published version before relying on it for any legal matter.
Published
July 11, 2023
Effective
August 15, 2023
Issuing agencies
Transportation DepartmentFederal Aviation Administration
Abstract
The FAA is adopting a new airworthiness directive (AD) for certain Bombardier, Inc., Model BD-100-1A10 airplanes. 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. This AD requires a records check and replacement of affected left-hand (LH) direct current power center (DCPC) units. The FAA is issuing this AD to address the unsafe condition on these products.
Full Text
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<title>Federal Register, Volume 88 Issue 131 (Tuesday, July 11, 2023)</title>
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[Federal Register Volume 88, Number 131 (Tuesday, July 11, 2023)]
[Rules and Regulations]
[Pages 44042-44045]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2023-14512]
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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;
Amendment 39-22446; AD 2023-11-01]
RIN 2120-AA64
Airworthiness Directives; Bombardier, Inc., Airplanes
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Final rule.
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SUMMARY: The FAA is adopting a new airworthiness directive (AD) for
certain Bombardier, Inc., Model BD-100-1A10 airplanes. 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. This AD
requires a records check and replacement of affected left-hand (LH)
direct current power center (DCPC) units. The FAA is issuing this AD to
address the unsafe condition on these products.
DATES: This AD is effective August 15, 2023.
The Director of the Federal Register approved the incorporation by
reference of certain publications listed in this AD as of August 15,
2023.
ADDRESSES:
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 final rule, the mandatory continuing airworthiness
information (MCAI), any comments received, and other information. The
address for Docket Operations is U.S. Department of Transportation,
Docket Operations, M-30, West Building Ground Floor, Room W12-140, 1200
New Jersey Avenue SE, Washington, DC 20590.
Material Incorporated by Reference:
<bullet> For service information identified in this final rule,
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#d3b2b0fdaaa6bf93b2b6a1bcfdefb2f3bba1b6b5ee" 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. It is also available at
<a href="http://regulations.gov">regulations.gov</a> under Docket No. FAA-2022-1662.
FOR FURTHER INFORMATION CONTACT: Steven Dzierzynski, Aviation Safety
Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590;
telephone 516-228-7367; email <a href="/cdn-cgi/l/email-protection#11283c7067623c7f6870727e3c727e62517770703f767e67"><span class="__cf_email__" data-cfemail="2e17034f585d0340574f4d41034d415d6e484f4f00494158">[email protected]</span></a>.
SUPPLEMENTARY INFORMATION:
Background
The FAA issued a notice of proposed rulemaking (NPRM) to amend 14
CFR part 39 by adding an AD that would apply to certain Bombardier,
Inc., Model BD-100-1A10 airplanes. The NPRM published in the Federal
Register on January 12, 2023 (88 FR 2029). The NPRM was prompted by AD
CF-2022-28, dated May 26, 2022, issued by Transport Canada, which is
the aviation authority for Canada (referred to after this as the MCAI).
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 states that Transport Canada previously issued AD 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.
In the NPRM, the FAA proposed to require a records check and
replacement
[[Page 44043]]
of affected LH DCPC units. The FAA is issuing this AD to address the
unsafe condition on these products.
You may examine the MCAI in the AD docket at <a href="http://regulations.gov">regulations.gov</a> under
Docket No. FAA-2022-1662.
Discussion of Final Airworthiness Directive
Comments
The FAA received comments from a commenter, NetJets. The following
presents the comments received on the NPRM and the FAA's response to
each comment.
Request To Define Action for Certain LH DCPCs
NetJets requested that the FAA specify what actions, if any, are
required for LH DCPC having less than 3,100 total flight cycles.
The FAA agrees to clarify. No action has been identified for those
LH DCPC units having less than 3,100 total flight cycles as of the
effective date of this AD. Once action has been identified, the FAA
might consider rulemaking to require those actions. No changes have
been made to this AD in this regard.
Request for Additional Method of Compliance
NetJets requested revising the proposed AD to allow use of certain
other service bulletins as a means of compliance with the proposed
requirements. NetJets suggested that accomplishment of Bombardier
Service Bulletin 350-24-005, dated November 29, 2022; or Safran Service
Bulletin 975GC02Y-24-020, dated August 5, 2022; could meet the intent
of the proposed requirements for certain LH DCPC part numbers (P/Ns).
NetJets pointed out that Bombardier Service Bulletin 350-24-005
references Bombardier Service Bulletin 350-24-004, dated April 9, 2021,
as a prior or concurrent service bulletin, and also provides
modification instructions that result in changing the part number of
the LH DCPC unit from P/N 975GC02Y07 to P/N 975GC02Y08. NetJets stated
that accomplishing those service bulletins could provide an acceptable
means of compliance and could exclude LH DCPC P/N 975GC02Y08 from the
proposed AD requirements.
The FAA agrees to revise this AD. The FAA has also reviewed
Bombardier Service Bulletin 100-24-30, dated November 29, 2022, and
determined that service bulletin also has similar modification
instructions. The FAA has determined that Bombardier Service Bulletins
100-24-30 and 350-24-005, both dated November 29, 2022, could be used
as optional terminating action. The FAA has revised this AD to add
paragraph (j) to this AD.
Conclusion
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 this State of Design Authority, it
has notified the FAA of the unsafe condition described in the MCAI
referenced above. The FAA reviewed the relevant data, considered the
comments received, and determined that air safety requires adopting
this AD as proposed. Accordingly, the FAA is issuing this AD to address
the unsafe condition on this product. Except for minor editorial
changes, and any other changes described previously, this AD is adopted
as proposed in the NPRM. None of the changes will increase the economic
burden on any operator.
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 (P/Ns 975GC02Y04, 975GC0Y05,
975GC02Y06, or 975GC02Y07). These documents are distinct since they
apply to different airplane configurations.
The FAA has also reviewed Bombardier Service Bulletins 100-24-30
and 350-24-005, both dated November 29, 2022. This service information
specifies procedures for modifying LH DCPC units having P/N 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.
Interim Action
The FAA considers that this AD is 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 would affect 315 airplanes of U.S.
registry. The FAA estimates the following costs to comply with this 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 $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 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
[[Page 44044]]
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
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) Will not affect intrastate aviation in Alaska, and
(3) 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 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:
2023-11-01 Bombardier, Inc.: Amendment 39-22446; Docket No. FAA-
2022-1662; Project Identifier MCAI-2022-00689-T.
(a) Effective Date
This airworthiness directive (AD) is effective August 15, 2023.
(b) Affected ADs
None.
(c) Applicability
This AD applies to Bombardier, Inc., Model BD-100-1A10
airplanes, certificated in any category, having serial numbers 20003
through 20795 inclusive, 20797 through 20812 inclusive, 20814
through 20832 inclusive, and 20834 through 20836 inclusive.
(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 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) Optional Terminating Action
Modification of a LH DCPC having part number (P/N) 975GC02Y07
into an LH DCPC having P/N 975GC02Y08, in accordance with Parts A
and B of the Accomplishment Instructions of the applicable service
bulletin identified in paragraphs (j)(1) and (2) of this AD, is
considered terminating action for the requirements of paragraphs (g)
and (h) of this AD for that LH DCPC.
(1) For airplanes having serial number 20001 through 20500
inclusive, use Bombardier Service Bulletin 100-24-30, dated November
29, 2022.
(2) For airplanes having serial number 20501 through 20999
inclusive, use Bombardier Service Bulletin 350-24-005, dated
November 29, 2022.
(k) Additional AD Provisions
The following provisions also apply to this AD:
(1) Alternative Methods of Compliance (AMOCs): The Manager, AIR-
730, International Validation 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 International Validation Branch, mail it to ATTN: Program
Manager, Continuing Operational Safety, at the address identified in
paragraph (l)(2) of this AD or email to: <a href="/cdn-cgi/l/email-protection#281105495e5b054651494b47054b475b684e4949064f475e"><span class="__cf_email__" data-cfemail="1b22367a6d683675627a7874367874685b7d7a7a357c746d">[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, International
Validation 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.
(l) 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, Aviation Safety Engineer, FAA, 1600 Stewart Avenue,
Suite 410, Westbury, NY 11590; telephone 516-228-7367; email <a href="/cdn-cgi/l/email-protection#11283c7067623c7f6870727e3c727e62517770703f767e67"><span class="__cf_email__" data-cfemail="fbc2d69a8d88d695829a9894d6989488bb9d9a9ad59c948d">[email protected]</span></a>.
(m) Material Incorporated by Reference
(1) The Director of the Federal Register approved the
incorporation by reference of
[[Page 44045]]
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 100-24-30, dated November 29,
2022.
(iii) Bombardier Service Bulletin 350-24-004, dated April 9,
2021.
(iv) Bombardier Service Bulletin 350-24-005, dated November 29,
2022.
(3) For 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#5332307d2a263f133236213c7d6f32733b2136356e" 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#aaccd884c3c4d9dacfc9dec3c5c4eac4cbd8cb84cdc5dc"><span class="__cf_email__" data-cfemail="9bfde9b5f2f5e8ebfef8eff2f4f5dbf5fae9fab5fcf4ed">[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 May 25, 2023.
Ross Landes,
Deputy Director for Regulatory Operations, Compliance & Airworthiness
Division, Aircraft Certification Service.
[FR Doc. 2023-14512 Filed 7-10-23; 8:45 am]
BILLING CODE 4910-13-P
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