AD 2024-13-01

This AD is effective August 16, 2024.

The Director of the Federal Register approved the incorporation by reference of certain publications listed in this AD as of August 16, 2024.

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.

Steven Dzierzynski, Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; phone: 516-228-7300; email: 9-avs-nyaco-cos@faa.gov.

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.

The FAA received no comments on the NPRM or on the determination of the cost to the public.

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.

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.

The FAA estimates that this AD affects 163 airplanes of U.S. registry.

The FAA estimates the following costs to comply with this AD:

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:

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.

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.

Accordingly, under the authority delegated to me by the Administrator, the FAA amends 14 CFR part 39 as follows:

1. The authority citation for part 39 continues to read as follows:

2. The FAA amends § 39.13 by adding the following new airworthiness directive: