[Federal Register Volume 89, Number 218 (Tuesday, November 12, 2024)]
[Rules and Regulations]
[Pages 88884-88886]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2024-25979]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2024-2007; Project Identifier MCAI-2023-01270-T;
Amendment 39-22871; AD 2024-21-04]
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 all
Bombardier, Inc., Model BD-100-1A10 airplanes. This AD was prompted by
a determination that new or more restrictive maintenance tasks are
necessary. This AD requires revising the existing maintenance or
inspection program, as applicable, to incorporate new or more
restrictive maintenance tasks. The FAA is issuing this AD to address
the unsafe condition on these products.
DATES: This AD is effective December 17, 2024.
The Director of the Federal Register approved the incorporation by
reference of certain publications listed in this AD as of December 17,
2024.
ADDRESSES:
AD Docket: You may examine the AD docket at regulations.gov under
Docket No. FAA-2024-2007; 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:
For Bombardier, Inc. material 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 bombardier.com">ac.yul@aero.bombardier.com; website
bombardier.com.
You may view this material 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 regulations.gov under
Docket No. FAA-2024-2007.
FOR FURTHER INFORMATION CONTACT: Steven Dzierzynski, Aviation Safety
Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590;
telephone: 516-228-7300; email: [email protected].
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 all Bombardier, Inc.,
Model BD-100-1A10 airplanes. The NPRM published in the Federal Register
on August 9, 2024 (89 FR 65267). The NPRM was prompted by AD CF-2023-
78, dated December 19, 2023, issued by Transport Canada, which is the
aviation authority for Canada (also referred to as the MCAI). The MCAI
states that airplanes could experience misleading electrical system
status indications (push button annunciators (PBA) and engine
instrument and crew alerting system (EICAS)) as a result of
contamination of electrical contacts in the left-hand (LH) direct
current power center (DCPC) internal communication data bus. The MCAI
states that new or more restrictive maintenance tasks have been
developed to rectify lower time LH DCPC units not addressed by
previously issued ADs.
In the NPRM, the FAA proposed to require revising the existing
maintenance or inspection program, as applicable, to incorporate new or
more restrictive maintenance tasks. The FAA is issuing this AD to
address erratic indications, which could cause the flightcrew 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.
You may examine the MCAI in the AD docket at regulations.gov under
Docket No. FAA-2024-2007.
Discussion of Final Airworthiness Directive
Comments
The FAA received no comments on the NPRM or on the determination of
the cost to the public.
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 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, this AD is adopted as proposed in
the NPRM. None of the changes will increase the economic burden on any
operator.
Material Incorporated by Reference Under 1 CFR Part 51
The FAA reviewed the following documents:
Task 24-61-01-101*, ``Restoration of the left DC Power
Center (DCPC) (Pre SB100-24-30),'' Section 5-10-20, ``Time Limits--
Supplementary Limitations,'' of Part 2, ``Airworthiness Limitations'',
of the Bombardier Challenger 300 Time Limits/Maintenance Checks,
Publication No. CH 300 TLMC, Revision 24, dated August 9, 2023.
Task 24-61-01-101*, ``Restoration of the Left DC Power
Center (DCPC) (Pre SB350-24-005),'' Section 5-10-20, ``Time Limits--
Supplementary Limitations,'' of Part 2, ``Airworthiness Limitations,''
of the Bombardier Challenger 350 Time Limits/Maintenance Checks,
Publication No. CH 350 TLMC, Revision 14, dated August 9, 2023.
This material specifies new or more restrictive airworthiness
limitations for
[[Page 88885]]
safe life limits. These documents are distinct since they apply to
different airplane configurations. The asterisk (or ``one star'') with
the last three digits of the task numbers indicates that the task is an
airworthiness limitation task.
This material is reasonably available because the interested
parties have access to it through their normal course of business or by
the means identified in ADDRESSES section.
Costs of Compliance
The FAA estimates that this AD affects 356 airplanes of U.S.
registry. The FAA estimates the following costs to comply with this AD.
The FAA has determined that revising the maintenance or inspection
program takes an average of 90 work-hours per operator, although the
agency recognizes that this number may vary from operator to operator.
Since operators incorporate maintenance or inspection program changes
for their affected fleet(s), the FAA has determined that a per-operator
estimate is more accurate than a per-airplane estimate. Therefore, the
agency estimates the average total cost per operator to be $7,650 (90
work-hours x $85 per work-hour).
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
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:
2024-21-04 Bombardier, Inc.: Amendment 39-22871; Docket No. FAA-
2024-2007; Project Identifier MCAI-2023-01270-T.
(a) Effective Date
This airworthiness directive (AD) is effective December 17,
2024.
(b) Affected ADs
None.
(c) Applicability
This AD applies to all Bombardier, Inc., Model BD-100-1A10
airplanes, certificated in any category.
(d) Subject
Air Transport Association (ATA) of America Code 24, Electrical
Power.
(e) Unsafe Condition
This AD was prompted by a determination that new or more
restrictive maintenance tasks are necessary. The FAA is issuing this
AD to address erratic indications, which could cause the flightcrew
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) Maintenance or Inspection Program Revision
Within 60 days after the effective date of this AD, revise the
existing maintenance or inspection program, as applicable, to
incorporate the information specified in the tasks specified in
figure 1 to paragraph (g) of this AD, of Part 2, ``Airworthiness
Limitations,'' of the applicable Time Limits/Maintenance Checks
(TLMC) manual. The initial compliance time for doing the tasks is at
the interval specified in the applicable TLMC manual specified in
figure 1 to paragraph (g) of this AD, or within 60 days after the
effective date of this AD, whichever occurs later.
Figure 1 to Paragraph (g)--Time Limits--Supplementary Limitations Tasks
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Chapter 5 task
Airplane model No. Task title TLMC section TLMC
----------------------------------------------------------------------------------------------------------------
BD-100-1A10 (Challenger 300). 24-61-01-101 * Restoration of the 5-10-20, ``Time Revision 24,
Left DC Power Center Limits--Supplementar dated August 9,
(DCPC) (Pre SB100-24- y Limitations''. 2023.
30).
BD-100-1A10 (Challenger 350). 24-61-01-101 * Restoration of the 5-10-20, ``Time Revision 14,
Left DC Power Center Limits--Supplementar dated August 9,
(DCPC) (Pre SB350-24- y Limitations''. 2023.
005).
----------------------------------------------------------------------------------------------------------------
Note 1 to paragraph (g): The asterisk (or ``one star'') with
the last three digits of the task numbers listed in figure 1 to
paragraph (g) of this AD indicates that the task is an airworthiness
limitation task.
(h) No Alternative Actions or Intervals
After the existing maintenance or inspection program has been
revised as required by paragraph (g) of this AD, no alternative
actions (e.g., inspections) or intervals may be used unless the
actions and intervals are approved as an alternative method of
compliance (AMOC) in accordance with the procedures specified in
paragraph (i)(1) of this AD.
[[Page 88886]]
(i) Other FAA AD Provisions
The following provisions also apply to this AD:
(1) Alternative Methods of Compliance (AMOCs): The Manager,
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 the address identified
in paragraph (j) of this AD. Information may be emailed to:
[email protected]. 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.
(j) Additional Information
For more information about this AD, contact Steven Dzierzynski,
Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410,
Westbury, NY 11590; telephone: 516-228-7300; email: [email protected].
(k) Material Incorporated by Reference
(1) The Director of the Federal Register approved the
incorporation by reference (IBR) of the material listed in this
paragraph under 5 U.S.C. 552(a) and 1 CFR part 51.
(2) You must use this material as applicable to do the actions
required by this AD, unless this AD specifies otherwise.
(i) Task 24-61-01-101*, ``Restoration of the left DC Power
Center (DCPC) (Pre SB100-24-30),'' Section 5-10-20, ``Time Limits--
Supplementary Limitations,'' of Part 2, ``Airworthiness
Limitations'', of the Bombardier Challenger 300 Time Limits/
Maintenance Checks, Publication No. CH 300 TLMC, Revision 24, dated
August 9, 2023.
Note 2 to paragraph (k)(2)(i): The asterisk (or ``one star'')
with the last three digits of the task numbers listed in paragraphs
(k)(2)(i) and (ii) of this AD indicates that the task is an
airworthiness limitation task.
(ii) Task 24-61-01-101*, ``Restoration of the Left DC Power
Center (DCPC) (Pre SB350-24-005),'' Section 5-10-20, ``Time Limits--
Supplementary Limitations,'' of Part 2, ``Airworthiness
Limitations,'' of the Bombardier Challenger 350 Time Limits/
Maintenance Checks, Publication No. CH 350 TLMC, Revision 14, dated
August 9, 2023.
(3) For Bombardier Inc. material 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 bombardier.com">ac.yul@aero.bombardier.com; website
bombardier.com.
(4) You may view this material at the FAA, Airworthiness
Products Section, Operational Safety Branch, 2200 South 216th
Street, Des Moines, WA. For information on the availability of this
material at the FAA, call 206-231-3195.
(5) You may view this material at the National Archives and
Records Administration (NARA). For information on the availability
of this material at NARA, visit www.archives.gov/federal-register/cfr/[email protected]">www.archives.gov/federal-register/cfr/[email protected].
Issued on October 24, 2024.
Victor Wicklund,
Deputy Director, Compliance & Airworthiness Division, Aircraft
Certification Service.
[FR Doc. 2024-25979 Filed 11-8-24; 8:45 am]
BILLING CODE 4910-13-P