AIRWORTHINESS DIRECTIVE
CAA-AD-076/2000
Date of issue: August 09, 2000
AIRCRAFT - AFT ENGINE MOUNT LINKS - INSPECTION
Applicability: AIRBUS INDUSTRIE A310 aircraft, A310-203 and A310-203C models, equipped with General Electric CF6-80A3 engines, on which AIRBUS INDUSTRIE modification No 12270 in production (AIRBUS INDUSTRIE Service Bulletin (SB) A310-71-2029 in service) has not been embodied.
Effective date: October 05, 2000
Compliance: Required as indicated in DGAC AD 2000-267-318(B).
Remarks: The compliance of this AD must be recorded in Aircraft Logbook, where applicable the requirements of this AD must be integrated into Aircraft Technical Documentation. 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.
Ing. Pavel MATOUŠEK
Director of Airworthiness Division
CAA CZ
DGAC AD ref.: 2000-267-318(B)
AIRBUS INDUSTRIE
A310 aircraft
RH and LH aft engine mount links on CF6-80A3 engines (ATA 71)
APPLICABILITY:
AIRBUS INDUSTRIE A310 aircraft, A310-203 and A310-203C models, equipped with General Electric CF6-80A3 engines, on which AIRBUS INDUSTRIE modification No 12270 in production (AIRBUS INDUSTRIE Service Bulletin (SB) A310-71-2029 in service) has not been embodied.
REASONS:
Further to a scheduled engine removal during which en operator discovered a crack at the upper end of the LH link on the aft engine mount assembly of a CF6-80A3 engine (which could result in a failure of the mount itself, leading to engine pivoting or, in the worst case, its separation), a program of repetitive inspections of the LH aft attachment of the CF6-80A3 engines was rendered mandatory by Airworthiness Directive (AD) 98-205-250(B), dated May 20, 1998.
A thorough analysis of this event revealed that the premature initiation of structural fatigue cracks was due to bearing race migration, as well as internal bearing frictions.
It is thus necessary to extend the inspection zone to the RH aft engine mount.
ACTIONS:
1. At the latest within 400 flights from the effective date of this Airworthiness Directive, unless already accomplished, apply the actions described in ROHR Alert SB CF6-80A3-NAC-A71-061 Revision 1.
2. Repeat the actions of ROHR Alert SB CF6-80A3-NAC-A71-061 Revision 1 at intervals not exceeding 400 flights.
No further action is required in accordance with this Airworthiness Directive, once AIRBUS INDUSTRIE SB A310-71-2029 has been applied.
REF.: - ROHR Alert Service Bulletin CF6-80A3-NAC-A71-061 Revision 1.
- AIRBUS INDUSTRIE SB A310-71-2029 original issue.
Any later approved revision of these SBs is acceptable.
This Airworthiness Directive replaces AD 98-205-250(B) which is cancelled by its Revision 1.
Conformity to this AD releases from the requirements of AD 98-344-IMP (B) for aircraft concerned by the present AD.
EFFECTIVE DATE: JULY 08, 2000