Applicability: AIRBUS INDUSTRIE A310 aircraft, A310-221, A310-222, A310-322, A310-324 and A310-325 models (A310 equipped with PRATT & WHITNEY engines), all serial numbers, on which AIRBUS INDUSTRIE production modification no. 10149 has not been embodied.

Effective date: August 12, 1999

Compliance: Required as indicated in DGAC AD 1999-237-285(B).

Remarks: Where applicable, the requirements of this AD must be integrated into the Aircraft's Logbook(s). Address inquiries concerning this AD to: Civil Aviation Authority, Airworthiness Division, Ruzyne Airport, 160 08 Prague 6, Czech Republic, tel.: 420 2 33320922, fax: 420 2 20562270.

Engine pylon - Lower spar (ATA 54)

AIRBUS INDUSTRIE A310 aircraft, A310-221, A310-222, A310-322, A310-324 and A310-325 models (A310 equipped with PRATT & WHITNEY engines), all serial numbers, on which AIRBUS INDUSTRIE production modification no. 10149 has not been embodied.

Cracks were found between ribs 9 and 10 in the lower pylon spar of AIRBUS INDUSTRIE A300, A310 and A300-600 aircraft equipped with PRATT & WHITNEY engines.

In order to prevent crack initiation, an inspection program was rendered mandatory on these aircraft by Airworthiness Directive 92-049-130(B).

Following in-service events, a new definition of the A310 inspection program is required.

Note: A300 and A300-600 aircraft are still covered by Revision 4 (or any later issued revision) of Airworthiness Directive 92-049-130(B).

1) Prior to the accumulation of 3,800 flights since new or within 1,500 flights following the effective date of this Airworthiness Directive, whichever occurs later, perform an Eddy Current Inspection and take corrective actions, if necessary, in accordance with the instructions of AIRBUS INDUSTRIE Service Bulletin A310-54-2016 Revision 02.

Aircraft which have accumulated more than 10,000 flights (without exceeding 20,000 flights) on the effective date of this Airworthiness Directive must be inspected within the following 1,000 flights.

Aircraft which have accumulated more than 20,000 flights on the effective date of his Airworthiness Directive must be inspected within the following 500 flights.

Aircraft which have been modified in accordance with the instructions of AIRBUS INDUSTRIE Service Bulletin A310-54-2022 must be inspected within 23,200 flights following the embodiment of this modification.

2) Depending on the inspection results, repeat the inspection at intervals and in accordance with the instructions defined by AIRBUS INDUSTRIE Service Bulletin A310-54-2016 Revision 02.

AIRBUS INDUSTRIE Service Bulletins:

A310-54-2016 Revision 02 (or any later approved revision)

A310-54-2022 (or any later approved revision)

Airworthiness Directive 92-049-130(B)

EFFECTIVE DATE: JUNE 12, 1999