2024-21-04: Electrical Power

1. The authority citation for part 39 continues to read as follows: Authority: 49 U.S.C. 106(g), 40113, 44701. 2. The FAA amends § 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 Airplane model Chapter 5 task No. Task title TLMC section TLMC BD-100-1A10 (Challenger 300) 24-61-01-101 * Restoration of the Left DC Power Center (DCPC) (Pre SB100-24-30) 5-10-20, "Time Limits-Supplementary Limitations" Revision 24, dated August 9, 2023. BD-100-1A10 (Challenger 350) 24-61-01-101 * Restoration of the Left DC Power Center (DCPC) (Pre SB350-24-005) 5-10-20, "Time Limits-Supplementary Limitations" Revision 14, dated August 9, 2023. 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. (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: AMOC@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; telephone: 516-228-7300; email: 9-avs-nyaco-cos@faa.gov. (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 Côte Vertu Road West, Dorval, Québec H4S 1Y9, Canada; telephone 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 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/ibr-locationsoremailfr.inspection@nara.gov. 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