Airworthiness Directive · Amendment 39-18128 · ATR-GIE Avions de Transport Régional Airplanes
ATR-GIE Avions de Transport Régional Airplanes
This AD applies to ATR-GIE Avions de Transport Régional Model ATR72-212A airplanes, certificated in any category, manufacturer serial numbers 468 through 719 inclusive, 723, 776, 777, 779, 821, and 837.
We are adopting a new airworthiness directive (AD) for certain ATR-GIE Avions de Transport R[eacute]gional Model ATR72-212A airplanes. This AD requires inspection of the shock mount pick-up fittings and cone bolts, and replacement of certain shock mount pick-up fittings if necessary. This AD was prompted by reports of several cases of engine shock mount pick-up fittings with cracks or failure on the engine left- hand (LH) aft side attachment. We are issuing this AD to detect and correct an aft side attachment pick-up fitting failure associated with a cone bolt failure that could reduce the structural integrity of the concerned engine nacelle, and possibly result in detachment of the engine and consequent reduced control of the airplane.
Within 6 months after the effective date of this AD, accomplish the actions specified by paragraphs (g)(1), (g)(2), and (g)(3) of this AD concurrently.
(1) Identify the serial number (S/N) of the part number (P/N) S54210394200 (Barry Control P/N 94423-05) LH and right-hand (RH) shock mount pick-up fittings installed on both engine nacelles. Figure 1 to paragraph (g)(1) of this AD identifies the fitting part number and serial number locations.
(2) Do a detailed inspection of both LH and RH aft side isolator pick-up fittings on both engines to detect cracks, in accordance with paragraph 004.1 of ATR ATR72 Aircraft Maintenance Manual (AMM) Job Instruction Card (JIC) 54-11-61 DVI 10000, dated March 1, 2012. Refer to figure 2 to paragraph (g)(2) of this AD for potential crack location.
(3) Do a detailed inspection of both LH and RH aft shock mount cone bolts on both engines to detect cracks, in accordance with paragraph 006.3.A. of ATR ATR72 AMM JIC 71-20-00 DVI 10000. Refer to figure 3 to paragraph (g)(3) of this AD for potential crack location.
(1) If any crack is found during any inspection required by paragraphs (g)(2) and (g)(3) of this AD: Before further flight, repair in accordance with a method approved by the Manager, International Branch, ANM-116, Transport Airplane Directorate, FAA; or EASA; or ATR's EASA Design Organization Approval (DOA).
(2) If the serial number of the LH shock mount pick-up fitting, identified during any inspection required by paragraph (g)(1) of this AD, is lower than 2451 or is unreadable, and no crack has been found during any inspection required by paragraphs (g)(2) and (g)(3) of this AD: Within 6 months after the inspection required by paragraph (g)(2) of this AD, replace the LH shock mount pick-up fitting P/N S54210394200 with a serviceable LH shock mount pick-up fitting having a serial number equal to or higher than 2451, in accordance with a method approved by the Manager, International Branch, ANM-116, Transport Airplane Directorate, FAA; or EASA; or ATR—GIE Avions de Transport Régional's EASA DOA.
As of the effective date of this AD, do not install on any airplane a LH shock mount pick-up fitting P/N S54210394200, unless it is serviceable and has been determined to have an S/N equal to or higher than 2451, in accordance with the requirements of paragraph (g)(1) of this AD.
Submit a report of the findings (both positive and negative) of the inspections required by paragraphs (g)(1), (g)(2), and (g)(3) of this AD to ATR at techdesk@atr.fr and continued.airworthiness@atr.fr at the applicable time specified in paragraph (j)(1) or (j)(2) of this AD. The report must include the airplane serial number, registration, inspection date, inspection results, and engine pick-up serial numbers.
(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.
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
