AIRWORTHINESS DIRECTIVE
CAA-AD-T-062/1999
Date of issue: June 09, 1999
AIRCRAFT - THRUST REVERSER, DIRECTIONAL PILOT VALVE - INSPECTION
Applicability: All Airbus A300-600 and A310 aircraft equipped with CF6-80A3 or CF6-80C2 Engines.
Effective date: Uponreceipt
Compliance: Required as indicated in DGAC AD T1999-242-289(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.
Ing. Pavel MATOUŠEK
Director of Airworthiness Division, CAA CZ
No T1999-242-289(B)
Issued by: DGAC FRANCE as PRIMARY AIRWORTHINESS AUTHORITY
On : JUNE 7, 1999
No person may operate an aircraft to which an Airworthiness Directive applies, except in accordance with the requirements of that Airworthiness Directive, unless otherwise agreed with the Authority of the state of registry.
ATA 78
TITLE: A300-600, A310: Thrust Reverser
Directional Pilot Valve
APPLICABILITY: All Airbus A300-600 and A310 aircraft equipped with CF6-80A3 or CF6-80C2 Engines
REASON: This Telegraphic Airworthiness Directive is prompted by a recent finding of possible undetected leakage of Directional Pilot Valve (DPV) used in the Thrust Reverser (T/R) deployment on CF6-80A3 or CF6-80C2 Engines.
When associated with an open Pressure Regulating and Shutoff Valve (PRSOV) failure, this condition, if not corrected, could result in an inadvertent T/R deployment in flight.
ACTION: To prevent an inadvertent T/R deployment in flight accomplish the following before June 28,1999 and thereafter at interval not to exceed 700 Flight Hours:
a) A300-600 aircraft: Perform an on-wing T/R DPV leak check in accordance with Middle River Aircraft Systems (MRAS) Service Bulletin 78A1081(CF6-80C2) as described in paragraph 4.2 of Airbus' AOT A300-600 78A6016/04 JUN 99
b) A310 aircraft: Perform an on-wing T/R DPV leak check in accordance with MRAS Service Bulletin 78A4022(CF6-80A3) or 78A1081(CF6-80C2) as described in paragraph 4.2 of Airbus' AOT A310-78A2017/04 JUN 99.
If a DPV does not comply with the appropriate MRAS SB requirements, or if the DPV leak check cannot be performed before June 28, 1999:
i) deactivate the T/R following the instructions described in Airbus
Aircraft Maintenance Manual (AMM) 78-31-00 page block 901,
or,
ii) remove/replace the faulty DPV with one that has not been operated
in revenue service since being tested per the applicable Component
Maintenance Manual.NOTES: i) Publications: Airbus Industrie AOT A300-600 78A6016/xx JUN 99
Airbus Industrie AOT A310-78A2017/xx JUN 99
MRAS SB 78A1081 (CF6-80C2)
MRAS SB 78A4022 (CF6-80A3)
AMM 78-31-00 page block 901
ii) Inquiries regarding the technical content of this TAD should be made to: DGAC France Jean BEIJARD Tel.: (33) 01.41.09.42.29 - Fax: (33) 01.41.09.42.20 (or 43.19)
or to
Airbus Industrie
Yves REGIS
Tel: (33) 05.61.93.31.81 Fax (33) 05.61.93.45.80
EFFECTIVE DATE: June 07, 1999