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AGENCY:
Federal Aviation Administration (FAA), DOT.
ACTION:
Final rule.
SUMMARY:
The FAA is adopting a new airworthiness directive (AD) for certain MHI RJ Aviation ULC Model CL-600-2C10 (Regional Jet Series 700, 701 & 702), CL-600-2D15 (Regional Jet Series 705), and CL-600-2D24 (Regional Jet Series 900) airplanes. This AD was prompted by a report that the electrical harnesses in the overhead bin above the class divider may have insufficient or no separation with the class divider mounting plate. This AD requires inspecting the overhead bin electrical harnesses at the class dividers and modifying the class divider mounting plate assembly or accomplishing a temporary repair if necessary; and, eventually modifying the class divider mounting plate assembly if a modification was not done after accomplishing the inspection, as specified in a Transport Canada AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products.
DATES:
This AD is effective October 23, 2024.
The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD as of October 23, 2024.
ADDRESSES:
AD Docket: You may examine the AD docket at regulations.gov under Docket No. FAA-2024-1470; 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 Transport Canada material identified in this AD, contact Transport Canada, Transport Canada National Aircraft Certification, 159 Cleopatra Drive, Nepean, Ontario K1A 0N5, Canada; telephone 888-663-3639; emailTC.AirworthinessDirectives-Consignesdenavigabilite.TC@tc.gc.ca. You may find this material on the Transport Canada website at tc.canada.ca/en/aviation.
- 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. It is also available atregulations.gov under Docket No. FAA-2024-1470.
FOR FURTHER INFORMATION CONTACT:
Fatin Saumik, Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516-228-7300; 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 MHI RJ Aviation ULC Model CL-600-2C10 (Regional Jet Series 700, 701 & 702), CL-600-2D15 (Regional Jet Series 705), and CL-600-2D24 (Regional Jet Series 900) airplanes. The NPRM published in the Federal Register on May 29, 2024 (89 FR 46336). The NPRM was prompted by AD CF-2023-79, dated December 21, 2023, issued by Transport Canada, which is the aviation authority for Canada (Transport Canada AD CF-2023-79) (also referred to as the MCAI). The MCAI states that the electrical harnesses in the overhead bin above the class divider may have insufficient or no separation with the class divider mounting plate. This condition, if not corrected, could result in the electrical harnesses becoming chafed, which could affect the following aircraft systems: ordinance signs, emergency lights/signs, passenger oxygen, and passenger address and air conditioning systems.
In the NPRM, the FAA proposed to require inspecting the overhead bin electrical harnesses at the class dividers and modifying the class divider mounting plate assembly or accomplishing a temporary repair if necessary; and, eventually modifying the class divider mounting plate assembly if a modification was not done after accomplishing the inspection, as specified in Transport Canada AD CF-2023-79. The FAA is issuing this AD to address the unsafe condition on these products.
You may examine the MCAI in the AD docket at regulations.gov under Docket No. FAA-2024-1470.
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
Transport Canada AD CF-2023-79 specifies procedures for inspecting the left-hand and right-hand overhead bin electrical harnesses at the class divider for damage ( e.g., chafing), and if damage is found, modifying the class divider mounting plate assembly to improve the overhead bin harnesses protection or accomplishing a temporary repair. Transport Canada AD CF-2023-79 also specifies procedures for eventually modifying the class divider mounting plate assembly if a modification was not done after accomplishing the inspection ( i.e., if a temporary repair was done or if no damage was found after accomplishing the inspection). 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 the ADDRESSES section.
Costs of Compliance
The FAA estimates that this AD affects 246 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 × $85 per hour = $255 | $0 | $255 | $62,730. |
| Up to 9 work-hours × $85 per hour = $765 | $366 | Up to $1,131 | Up to $278,226. |
Estimated Costs of On-Condition Actions *
| Labor cost | Parts cost | Cost per product |
|---|---|---|
| Up to 9 work-hours × $85 per hour = $765 | $366 | Up to $1,131. |
| * The FAA has received no definitive data on which to base the cost estimates for the on-condition optional temporary repair specified in this AD. |