Airworthiness Directive · Amendment 39-22874 · Electrical power
Airbus Canada Limited Partnership (Type Certificate Previously Held by C Series Aircraft Limited Partnership (CSALP); Bombardier, Inc.) Airplanes
This AD applies to Airbus Canada Limited Partnership (Type Certificate previously held by C Series Aircraft Limited Partnership (CSALP); Bombardier, Inc.) Model BD-500-1A10 and BD-500-1A11 airplanes, certificated in any category, as identified in Transport Canada Emergency AD CF-2024-34, dated September 19, 2024 (Transport Canada Emergency AD CF-2024-34), or Transport Canada Emergency AD CF-2024-34R1, dated October 15, 2024 (Transport Canada Emergency AD CF-2024-34R1).
The FAA is superseding Airworthiness Directive (AD) 2024-04- 11, which applied to certain Airbus Canada Limited Partnership Model BD-500-1A10 and BD-500-1A11 airplanes. AD 2024-04-11 required modifying the variable frequency generator (VFG) power-feeder harness routing. Since the FAA issued AD 2024-04-11, the FAA received a report of damage to a VFG power-feeder harness, resulting in the loss of the associated VFG and the posting of the L GEN FAIL (Caution) message. This AD continues to require modifying the VFG power-feeder harness routing, and also requires inspecting the VFG power-feeder harnesses for damage and clearance, repairing or replacing the VFG power-feeder harnesses if necessary, modifying and adjusting the VFG power-feeder harnesses if necessary, and prohibiting dispatch of certain airplanes under certain master minimum equipment list (MMEL) items; as specified in a Transport Canada emergency AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products.
Except as specified in paragraph (h) of this AD: Comply with all required actions and compliance times specified in, and in accordance with, Transport Canada Emergency AD CF-2024-34 or Transport Canada Emergency AD CF-2024-34R1.
(1) Where Transport Canada Emergency AD CF-2024-34 refers to its effective date, this AD requires using the effective date of this AD.
(2) Where Transport Canada Emergency AD CF-2024-34R1 refers to the effective date of AD CF-2024-34 (22 September 2024), this AD requires using the effective date of this AD.
(3) Where Transport Canada Emergency AD CF-2024-34 and AD CF-2024-34R1 refer to “hours air time,” this AD requires replacing those words with “flight hours.”
(4) Where Transport Canada Emergency AD CF-2024-34 and AD CF-2024-34R1 define “Group B aeroplanes,” replace that definition with “Model BD-500-1A10 airplanes, having serial numbers 50001 through 50047, and Model BD-500-1A11 airplanes, having serial numbers 55001 through 55070, which have not incorporated Part C of the Accomplishment Instructions of ACLP SB BD500-534101, Issue 005, dated June 12, 2020, Issue 006, dated August 14, 2020, Issue 007, dated October 2, 2020, or Issue 008, dated March 13, 2024.”
(5) Where Transport Canada Emergency AD CF-2024-34 and AD CF-2024-34R1 define “Applicable MMEL Items,” replace that definition with figure 1 to paragraph (h)(5) of this AD.
(6) Paragraph A. of Part I of Transport Canada Emergency AD CF-2024-34 and AD CF-2024-34R1 refer to airplanes with less than 6 flight cycles since “ACLP SB BD500-534101 Part C incorporation,” for this AD, that paragraph applies to airplanes with less than 6 flight cycles as of the effective date of this AD since “ACLP SB BD500-534101 Part C incorporation.”
(7) Paragraph B. of Part I of Transport Canada Emergency AD CF-2024-34 and AD CF-2024-34R1 refer to airplanes with 6 flight cycles or more since “ACLP SB BD500-534101 Part C incorporation,” for this AD, that paragraph applies to airplanes with 6 flight cycles or more as of the effective date of this AD since “ACLP SB BD500-534101 Part C incorporation.”
Although the note in Part I of Transport Canada AD CF-2024-34 and AD CF-2024-34R1 specify to submit certain information to Transport Canada or the manufacturer, this AD does not include that requirement.
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, send it to the attention of the person identified in paragraph (k) of this AD and email 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 Airbus Canada Limited Partnership's Transport Canada Design Approval Organization (DAO). If approved by the DAO, the approval must include the DAO-authorized signature.
(3) Required for Compliance (RC): Except as required by paragraph (j)(2) of this AD, if any material contains procedures or tests that are identified as RC, those procedures and tests must be done to comply with this AD; any procedures or tests that are not identified as RC are recommended. Those procedures and tests that are not identified as RC may be deviated from using accepted methods in accordance with the operator's maintenance or inspection program without obtaining approval of an AMOC, provided the procedures and tests identified as RC can be done and the airplane can be put back in an airworthy condition. Any substitutions or changes to procedures or tests identified as RC require approval of an AMOC.
For more information about this AD, contact William Reisenauer, Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; phone: 516-228-7300; email: 9-avs-nyaco-cos@faa.gov.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
