Airworthiness Directive · Amendment 39-23154 · Flight controls
ATR-GIE Avions de Transport Régional Airplanes
This AD applies to the ATR—GIE Avions de Transport Régional airplanes identified in paragraphs (c)(1) and (2) of this AD, certificated in any category, as identified in European Union Aviation Safety Agency (EASA) AD 2025-0004, dated January 7, 2025 (EASA AD 2025-0004).
(1) ATR42-500 airplanes.
(2) ATR72-101, -102, -201, -202, -211, -212, and -212A airplanes.
The FAA is adopting a new airworthiness directive (AD) for certain ATR--GIE Avions de Transport R[eacute]gional Model ATR42-500 and ATR72 airplanes. This AD was prompted by an investigation indicating that an erroneous monitoring of the travel limitation unit (TLU) could occur when the airplane is flying above a certain speed as a result of the logic input from either air data computer (ADC) 1 or ADC2 input. This AD requires modifying airplanes by installing one or two relays and associated wiring and testing of the TLU monitoring logic. 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, EASA AD 2025-0004.
(1) Where EASA AD 2025-0004 refers to its effective date, this AD requires using the effective date of this AD.
(2) Paragraph (1) of EASA AD 2025-0004 applies to all airplanes except for airplanes identified in paragraph (4) of EASA AD 2025-0004.
(3) Where paragraph (3) of EASA AD 2025-0004 specifies “as required by paragraph (2) of this AD”, this AD requires replacing that text with “as required by paragraphs (2) and (4) of this AD”.
(4) Where paragraph (4) of EASA AD 2025-0004 specifies “the additional work”, this AD requires replacing that text with “the functional test of the rudder Travel Limiter Unit”.
(5) This AD does not adopt the “Remarks” section of EASA AD 2025-0004.
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 (j) 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 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 Jonathan Duong, Aviation Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; phone: 516-228-7362; email: 9-AVS-AIR-BACO-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.
Aircraft
