Airworthiness Directive · Amendment 39-17746 · Nacelles/pylons
ATR-GIE Avions de Transport Régional Airplanes
This AD applies to the airplanes identified in paragraphs (c)(1) and (c)(2) of this AD.
(1) ATR—GIE Avions de Transport Régional Model ATR42-200, -300, -320, and -500 airplanes, certificated in any category, manufacturer serial numbers 003 through 623 inclusive.
(2) ATR—GIE Avions de Transport Régional Model ATR72-101, -201, -102, -202, -211, -212, and -212A airplanes, certificated in any category, manufacturer serial numbers 108 through 710 inclusive.
We are adopting a new airworthiness directive (AD) for certain ATR--GIE Avions de Transport R[eacute]gional Model ATR42 and Model ATR72 airplanes. This AD was prompted by reports of defective sealing between the nacelle lower fairing and the underwing box. This AD requires a one-time general visual inspection for damaged (worn, torn, or abraded) or missing seals between the nacelle lower fairing and the underwing box of both the left-hand and right-hand engine nacelles, and replacement of the seal and/or shims if necessary. We are issuing this AD to prevent the decrease of the fire extinguishing agent efficiency, which could delay fire extinction and allow fire propagation out of the nacelle fire protected area, resulting in damage to the airplane.
Within 5,000 flight hours after the effective date of this AD: Do a one-time general visual inspection for damaged (worn, torn, or abraded) and missing shims and seals, between the nacelle lower fairing and the underwing box of both the left-hand and right-hand engine nacelles, in accordance with the Accomplishment Instructions of Avions de Transport Régional Service Bulletin ATR42-54-0029; or ATR72-54-1023; both dated July 18, 2012; as applicable. If any seal or shim is damaged or missing, before further flight, replace, as applicable, in accordance with the Accomplishment Instructions of Avions de Transport Régional Service Bulletin ATR42-54-0029; or ATR72-54-1023; both dated July 18, 2012; as applicable.
At the applicable time specified in paragraph (h)(1) or (h)(2) of this AD: Submit a report using the applicable Accomplishment Report of Avions de Transport Régional Service Bulletin ATR42-54-0029; or ATR72-54-1023; both dated July 18, 2012; to ATR Engineering, Service Bulletin Group, 1 Allee Pierre Nadot, 31712 Blagnac Cedex, France; phone: +33 (0) 5 62 21 62 21; fax: +33 (0) 5 62 21 69 41; email: techdesk@atr.fr.
(1) If the inspection was done on or after the effective date of this AD: Submit the report within 30 days after the inspection.
(2) 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.
