Airworthiness Directive · Amendment 39-21685 · Instruments
ATR-GIE Avions de Transport Régional Airplanes
Superseded. A later AD replaced this one: AD 2024-15-14. Comply with the one in force.
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) 2020-23- 13, which applied to all ATR--GIE Avions de Transport R[eacute]gional Model ATR42-200, -300, and -320 airplanes. AD 2020-23-13 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. This AD continues to require the actions in AD 2020-23-13, and also requires 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, as specified in a European Union Aviation Safety Agency (EASA) AD, which is incorporated by reference. This AD was prompted by false activation of the stall warning system due to wiring damage on the wire bundle between an AOA probe and the crew alerting computer, and the development of a wiring modification and AFM update to address the unsafe condition. 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 2021-0024, dated January 19, 2021 (EASA AD 2021-0024).
(1) Where EASA AD 2021-0024 refers to its effective date, this AD requires using the effective date of this AD.
(2) Where EASA AD 2021-0024 refers to “the effective date of EASA AD 2020-0221,” this AD requires using December 3, 2020 (the effective date of AD 2020-23-13).
(3) The “Remarks” section of EASA AD 2021-0024 does not apply to this AD.
(4) Paragraph (3) of EASA AD 2021-0024 specifies to report inspection results to ATR—GIE Avions de Transport Régional within a certain compliance time. For this AD, report inspection results at the applicable time specified in paragraph (h)(4)(i) or (ii) of this AD.
(i) If the inspection was done on or after December 3, 2020 (the effective date of AD 2020-23-13): Submit the report within 30 days after the inspection.
(ii) If the inspection was done before December 3, 2020 (the effective date of AD 2020-23-13): Submit the report within 30 days after December 3, 2020.
(5) Paragraphs (5) and (6) of EASA AD 2021-0024 specify amending “the applicable AFM [aircraft flight manual] of that aeroplane by inserting the AFM change provided in Appendix 1 of this [EASA] AD,” however this AD requires amending “the existing AFM and applicable corresponding operational procedures to incorporate the limitations and procedures specified in Appendix 1 of EASA AD 2021-0024.”
(6) Where paragraphs (5) and (6) of EASA AD 2021-0024 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.
(7) Where paragraph (1) of EASA AD 2021-0024 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.
