[4910-13-P]
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. FAA-2024-0467; Project Identifier MCAI-2023-00892-T; Amendment
39-22775; AD 2024-13-01]
RIN 2120-AA64
Airworthiness Directives; Bombardier, Inc., Airplanes
AGENCY: Federal Aviation Administration (FAA), DOT.
ACTION: Final rule.
SUMMARY: The FAA is adopting a new airworthiness directive (AD) for certain
Bombardier, Inc., Model CL-600-2B16 (604 Variant) airplanes. This AD was prompted
by a report of sparking due to damaged wire insulation in the fueling adapter. This AD
requires inspecting the electrical wires attached to the airplane connector located behind
the fuel scupper for damage, and all applicable related investigative and corrective
actions. The FAA is issuing this AD to address the unsafe condition on these products.
DATES: This AD is effective [INSERT DATE 35 DAYS AFTER DATE OF
PUBLICATION IN THE FEDERAL REGISTER].
The Director of the Federal Register approved the incorporation by reference of
certain publications listed in this AD as of [INSERT DATE 35 DAYS AFTER DATE OF
PUBLICATION IN THE FEDERAL REGISTER].
ADDRESSES:
AD Docket: You may examine the AD docket at regulations.gov under Docket No.
FAA-2024-0467; 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 service information, contact Bombardier Business Aircraft Customer
Response Center, 400 Côte-Vertu Road West, Dorval, Québec H4S 1Y9, Canada; phone
514-855-2999; email ac.yul@aero.bombardier.com; website 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. It is also
available at regulations.gov under Docket No. FAA-2024-0467.
FOR FURTHER INFORMATION CONTACT: Steven Dzierzynski, Aviation Safety
Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; phone: 516-2287300; email: 9-avs-nyaco-cos@faa.gov.
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 CL-600-2B16
(604 Variant) airplanes. The NPRM published in the Federal Register on March 21, 2024
(89 FR 20141). The NPRM was prompted by AD CF-2023-55, dated July 18, 2023,
issued by Transport Canada, which is the aviation authority for Canada (referred to after
this as the MCAI). The MCAI states that during airplane refueling, a spark was seen
when the fuel cap chain contacted one of the fuel scupper bolts. An inspection was
performed and one of the fourteen bolts that surround the fuel inlet was found touching
an electrical wire behind the scupper. Due to vibrations during flight, the bolt damaged

the wire insulation and when the bolt was grounded to the airframe a spark was
generated.
In the NPRM, the FAA proposed to require inspecting the electrical wires
attached to the airplane connector located behind the fuel scupper for damage, and all
applicable related investigative and corrective actions. The FAA is issuing this AD to
address damaged wire insulation, which could lead to electrical sparks during refueling
and possibly result in a fire.
You may examine the MCAI in the AD docket at regulations.gov under Docket
No. FAA-2024-0467.
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.
Related Service Information under 1 CFR Part 51
The FAA reviewed Bombardier Service Bulletin 605-28-014, dated May 10,
2023; and Bombardier Service Bulletin 650-28-003, dated May 10, 2023. This service
information specifies procedures for inspecting the electrical wires attached to the J274

connector (i.e., the airplane connector located behind the fuel scupper) for damage
(i.e., core of the electrical wire exposed, or damage such as black soot to the insulation
with no core exposure), and applicable related investigative and corrective actions. The
related investigative action includes inspecting the fuel scupper for damage (i.e., arcing
or pitting marks directly or indirectly induced by the wire chaffed on the scupper bolt and
the surrounding area). The corrective actions include repairing any damaged fuel scupper,
repairing or replacing any damaged electrical wire, and reinstalling the fuel scupper
without a certain attachment bolt. These documents are distinct since they apply to
different configurations of the airplane.
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.
Costs of Compliance
The FAA estimates that this AD affects 163 airplanes of U.S. registry.
The FAA estimates the following costs to comply with this AD:
Estimated costs for required actions
Labor cost

Parts cost

Cost per product

Cost on U.S. operators

3 work-hours X $85
per hour = $255

$0

$255

$41,565

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 these on-condition actions:
Estimated costs of on-condition actions
Labor cost

Parts cost

Cost per product

4 work-hours X $85 per hour = $340*

$0**

$340

* The FAA has received no definitive data on which to base the cost estimates for the
on-condition scupper repair specified in this AD.

** The FAA has received no definitive data on which to base the parts cost for the
electrical wire replacement specified in this AD.
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
1. The authority citation for part 39 continues to read as follows:
Authority: 49 U.S.C. 106(g), 40113, 44701.
§ 39.13 [Amended]
2. The FAA amends § 39.13 by adding the following new airworthiness directive:
2024-13-01 Bombardier, Inc.: Amendment 39-22775; Docket No. FAA-2024-0467;
Project Identifier MCAI-2023-00892-T.
(a) Effective Date
This airworthiness directive (AD) is effective [INSERT DATE 35 DAYS AFTER
DATE OF PUBLICATION IN THE FEDERAL REGISTER].
(b) Affected ADs
None.
(c) Applicability
This AD applies to Bombardier, Inc., Model CL-600-2B16 (604 Variant)
airplanes, certificated in any category, serial numbers 5775 through 5990 inclusive and
6050 through 6178 inclusive.
(d) Subject
Air Transport Association (ATA) of America Code 28, Fuel.
(e) Unsafe Condition
This AD was prompted by a report of sparking due to damaged wire insulation in
the fueling adapter. The FAA is issuing this AD to address damaged wire insulation. The
unsafe condition, if not addressed, could lead to electrical sparks during refueling and
possibly result in a fire.

(f) Compliance
Comply with this AD within the compliance times specified, unless already done.
(g) Inspections
Within 48 months after the effective date of this AD: Inspect the electrical wires
attached to the J274 connector for damage, in accordance with Section 2.B of the
Accomplishment Instructions of the applicable Bombardier service bulletin referenced in
figure 1 to paragraph (g) of this AD.

Figure 1 to paragraph (g) – Applicable service bulletins
Model

Serial Number

Service Bulletin

CL-600-2B16

5775 through 5990
inclusive

Bombardier Service Bulletin 605-28-014,
dated May 10, 2023

CL-600-2B16

6050 through 6178
inclusive

Bombardier Service Bulletin 650-28-003,
dated May 10, 2023

(h) Related Investigative and Corrective Actions
Before further flight after accomplishing paragraph (g) of this AD, do the
applicable actions specified in paragraph (h)(1) or (2) of this AD.
(1) If no electrical wire is damaged, do the related investigative and corrective
actions specified in and in accordance with Section 2.C of the Accomplishment
Instructions of the applicable Bombardier service bulletin referenced in figure 1 to
paragraph (g) of this AD.
(2) If any electrical wire is damaged, do the related investigative and corrective
actions specified in and in accordance with Section 2.D of the Accomplishment
Instructions of the applicable Bombardier service bulletin referenced in figure 1 to
paragraph (g) of this AD.
(i) Additional 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: 9-AVS-NYACO-COS@faa.gov. 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; phone: 516-2287300; email: 9-avs-nyaco-cos@faa.gov.
(k) Material Incorporated by Reference
(1) The Director of the Federal Register approved the incorporation by reference
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 605-28-014, dated May 10, 2023.
(ii) Bombardier Service Bulletin 650-28-003, dated May 10, 2023.

(3) For service information, contact Bombardier Business Aircraft Customer
Response Center, 400 Côte-Vertu Road West, Dorval, Québec H4S 1Y9, Canada; phone
514-855-2999; email 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 St., 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/ibr-locations or email
fr.inspection@nara.gov.
Issued on June 18, 2024.

James D. Foltz,
Deputy Director, Compliance & Airworthiness Division,
Aircraft Certification Service.
[FR Doc. 2024-15306 Filed: 7/11/2024 8:45 am; Publication Date: 7/12/2024]