Airworthiness Directive · Amendment 39-21372 · Instruments
ATR-GIE Avions de Transport Régional Airplanes
This AD applies to all ATR-GIE Avions de Transport Régional airplanes identified in paragraphs (c)(1) and (2) of this AD, certificated in any category.
(1) Model ATR42-500 airplanes.
(2) Model ATR72-101, -102, -201, -202, -211, -212, and -212A airplanes.
The FAA is adopting a new airworthiness directive (AD) for all ATR--GIE Avions de Transport R[eacute]gional Model ATR42-500 and ATR72 airplanes. This AD was prompted by a report of damage found on a wire bundle connecting an angle-of-attack (AOA) probe and a multi-function computer (MFC), which can inhibit activation of the stick pusher without any indication to the flight crew by the stall warning system. This AD requires a repetitive operational test for discrepancies of the stall warning system and stick pusher in the flight configuration, an inspection for discrepancies in the wiring bundles between AOA probes and MFCs, and corrective action if necessary, 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 2020-0249, dated November 11, 2020 (EASA AD 2020-0249).
(1) Where EASA AD 2020-0249 refers to its effective date, this AD requires using the effective date of this AD.
(2) The “Remarks” section of EASA AD 2020-0249 does not apply to this AD.
(3) Where paragraph (2) of EASA AD 2020-0249 specifies a compliance time for the inspection of “within 750 FH [flight hours] or 5 months, whichever occurs first” for this AD, the compliance time is “within 750 FH or 4 months, whichever occurs first.”
(4) Paragraph (4) of EASA AD 2020-0249 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 the effective date of this AD: Submit the report within 30 days after the inspection.
(ii) If the inspection was done before the effective date of this AD: Submit the report within 30 days after the effective date of this AD.
(5) Where paragraph (3) of EASA AD 2020-0249 refers to discrepancies, for this AD, for the operational tests specified in paragraph (1) of EASA AD 2020-0249, discrepancies include missing or incorrect annunciators, messages, indicators, warnings, or sounds; and for the inspection specified in paragraph (2) of EASA AD 2020-0249, discrepancies include damage to electrical routing and conduits, foreign object debris, electrical routing and conduits not properly attached.
(6) Where paragraph (3) of EASA AD 2020-0249 specifies corrective actions if any discrepancies are detected “during the first operational test as required by paragraph (1) of this [EASA] AD, or during the inspection as required by paragraph (2) of this [EASA] AD” for this AD, the corrective actions must be done if any discrepancies are detected during any operational test required by paragraph (1) of EASA AD 2020-0249, or during the inspection required by paragraph (2) of EASA AD 2020-0249.
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.
Aircraft
