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AGENCY:
Federal Aviation Administration (FAA), DOT.
ACTION:
Final rule.
SUMMARY:
The FAA is superseding Airworthiness Directive (AD) 2009-25-13, which applied to certain Bombardier, Inc., Model BD-100-1A10 (Challenger 300) airplanes. AD 2009-25-13 required the deactivation of the left-hand (LH) baggage bay heater mat. Since the FAA issued AD 2009-25-13, Bombardier developed a new design solution for the potential uncontrolled heating of the baggage bay sidewall heater mat. This AD retains the requirements of AD 2009-25-13 and requires modifying the baggage bay sidewall interior panel, heater mat, and water tank heater installation, and doing functional testing. Upon the completion of the new actions, the retained requirements of AD 2009-25-13 will terminate. This AD also revises the applicability. 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.
The Director of the Federal Register approved the incorporation by reference of a certain other publication listed in this AD as of December 28, 2009 (74 FR 65401, December 10, 2009).
ADDRESSES:
AD Docket: You may examine the AD docket at regulations.gov under Docket No. FAA-2024-1469; 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 Côte Vertu Road West, Dorval, Québec H4S 1Y9, Canada; telephone 514-855-2999; emailac.yul@aero.bombardier.com; website bombardier.com.
- 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-2024-1469.
FOR FURTHER INFORMATION CONTACT:
Steven Dzierzynski, 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 to supersede AD 2009-25-13, Amendment 39-16133 (74 FR 65401, December 10, 2009) (AD 2009-25-13). AD 2009-25-13 applied to certain Bombardier, Inc., Model BD-100-1A10 airplanes. AD 2009-25-13 required the deactivation of the LH baggage bay heater. The FAA issued AD 2009-25-13 to address the possibility of uncontrolled heating by the heater panel, and on the baggage bay compartment, that could result in a fire in the baggage bay.
The NPRM published in the Federal Register on May 22, 2024 (89 FR 44930). The NPRM was prompted by AD CF-2023-72, dated October 18, 2023, issued by Transport Canada, which is the aviation authority for Canada (Transport Canada AD CF-2023-72) (also referred to as the MCAI). The MCAI states that new procedures have been developed for modifications of the baggage bay sidewall interior panel, heater mat, and water tank heater installation that will address the unsafe condition.
In the NPRM, the FAA proposed to continue to require the actions in AD 2009-25-13, and further require modifying the baggage bay sidewall interior panel, heater mat, and water tank heater installation, and doing functional testing. In the NPRM, the FAA proposed that, upon the completion of the new actions, the retained requirements of AD 2009-25-13 would terminate. In the NPRM, the FAA also proposed to revise the applicability to clarify that the AD applies to airplanes having certain serial numbers (which equates to those equipped with sidewall heater having part number (P/N) 3436-06-1/0) instead of part numbers which could be misread. 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-2024-1469.
Discussion of Final Airworthiness Directive
Comments
The FAA received no comments on the NPRM or on the determination of the cost to the public.
Additional Changes Made to This Final Rule
In the NPRM, the FAA inadvertently stated that the NPRM proposed to prohibit the installation of affected parts. This AD does not contain a parts installation prohibition, so the FAA deleted references to such a prohibition.
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 Bombardier Service Bulletin 100-25-35, Revision 02, dated January 11, 2016. This material specifies procedures for modifying the LH baggage bay sidewall interior panel and heater mat, installing a LH baggage bay sidewall interior panel blind insert for certain airplanes, modifying the wiring of the LH and right-hand (RH) baggage bay sidewall heater mats, re-identifying the LH heater mat as P/N 3436-07, installing LH and RH heater pictograms for certain airplanes, modifying the water tank heater installation, and performing a functional test.
This AD also requires Bombardier Service Bulletin A100-25-30, dated July 20, 2009, which the Director of the Federal Register approved for incorporation by reference as of December 28, 2009 (74 FR 65401, December 10, 2009).
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 340 airplanes of U.S. registry. The FAA estimates the following costs to comply with this AD:
Estimated Costs for Required Actions
| Action | Labor cost | Parts cost | Cost per product | Cost on U.S. operators |
|---|---|---|---|---|
| Heater mat deactivation (Retained actions from AD 2009-25-13) | 1 work-hour × $85 per hour = $85 | $0 | $85 | $28,900 |
| Modification and testing (new actions) | 12 work-hours × $85 per hour = $1,020 | 1,150 | 2,170 | 737,800 |