Airworthiness Directive · Amendment 39-22806 · Instruments
ATR-GIE Avions de Transport Régional Airplanes
This AD applies to all ATR-GIE Avions de Transport Régional Model ATR42-200, -300, and -320 airplanes, certificated in any category.
The FAA is superseding Airworthiness Directive (AD) 2021-17- 02, which applied to all ATR-GIE Avions de Transport R[eacute]gional Model ATR42-200, -300, and -320 airplanes. AD 2021-17-02 required a one-time inspection for discrepancies of the wire bundles between the left- and right-hand angle of attack (AOA) probes and the crew alerting computer, and, depending on findings, applicable corrective actions. AD 2021-17-02 also required, for certain airplanes, modifying the captain stick shaker wiring, and for all airplanes, revising the existing aircraft flight manual (AFM) and applicable corresponding operational procedures to incorporate procedures for the stick pusher/shaker. Since the FAA issued AD 2021-17-02, additional modification of the affected wiring for certain airplanes was developed. This AD retains all of the requirements of AD 2021-17-02 and requires installing a new AOA power supply unit and removing the AFM amendment; as specified in a European Union Aviation Safety Agency (EASA) 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, European Union Aviation Safety Agency (EASA) AD 2023-0191, dated November 2, 2023 (EASA AD 2023-0191).
(1) Where EASA AD 2023-0191 refers to October 27, 2020 (the effective date of EASA AD 2020-0221), this AD requires using December 3, 2020 (the effective date of AD 2020-23-13, Amendment 39-21330 (85 FR 73407, November 18, 2020)).
(2) Where EASA AD 2023-0191 refers to February 2, 2021 (the effective date of EASA AD 2021-0024), this AD requires using October 5, 2021 (the effective date of AD 2021-17-02).
(3) Where paragraph (2) of EASA AD 2023-0191 refers to “discrepancies,” for this AD, discrepancies include, but are not limited to, wire damage, missing or damaged conduits, and incorrect routing of wiring and conduits.
(4) Where paragraph (8) of EASA AD 2023-0191 specifies “accomplish the additional work as identified in” replace that text with “accomplish the additional work as identified in section `1—ADDITIONAL WORK.' ”
(5) Where paragraphs (4) and (5) of EASA AD 2023-0191 specify to “inform all flight crews, and, thereafter, operate the aeroplane accordingly,” this AD does not require those actions, as those actions are already required by existing FAA operating regulations (see 14 CFR 91.9, 91.505, and 121.137).
(6) Where EASA AD 2023-0191 refers to its effective date, this AD requires using the effective date of this AD.
(7) Where EASA AD 2023-0191 refers to July 19, 2023 (the effective date of EASA AD 2023-0134), this AD requires using the effective date of this AD.
(8) This AD does not adopt the “Remarks” section of EASA AD 2023-0191.
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 or email to: 9-AVS-AIR-730-AMOC@faa.gov. If mailing information, also submit information by email. 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 EASA; or ATR-GIE Avions de Transport Régional's EASA Design Organization Approval (DOA). If approved by the DOA, the approval must include the DOA-authorized signature.
For more information about this AD, contact Shahram Daneshmandi, Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 206-231-3220; email Shahram.Daneshmandi@faa.gov.
