AIRWORTHINESS DIRECTIVE

CAA-AD-046/2002

Date of issue: April 18, 2002

AIRCRAFT - TRANSFORMER - RECTIFIER UNITS - TEMPORARY REVISION OF MMEL (ATA 24)

Applicability:

AIRBUS A300, A310 and A300-600 aircraft, all certified models and all serial numbers.

AIRBUS A300-600ST aircraft, all certified serial numbers.

Effective date: June 13, 2002

Compliance: Required as indicated in DGAC AD 2002-185(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 No.: 2002-185(B)

AIRBUS

A300, A310, A300-600 and A300-600ST BELUGA aircraft

Transformer - Rectifier Units (TRU) - Temporary revision of MMEL (ATA 24)

APPLICABILITY:

AIRBUS A300, A310 and A300-600 aircraft, all certified models and all serial numbers.

AIRBUS A300-600ST aircraft, all certified serial numbers.

REASONS:

Subsequent to in-service incidents, the manufacturer has evidenced a reduction in the reliability (MTBF) of the transformer rectifiers (TRU).

These TRU's are AUXILEC ones with P/N F11QY3121. For reference, Airworthiness Directive (AD) 1999-435-296(B) rendered mandatory the installation of TRU's with P/N F11QY3121 on aircraft.

Therefore, the manufacturer has issued a temporary revision of the Master Minimum Equipment List (MMEL) which renders more restrictive the operation of the aircraft with an inoperative TRU.

COMPLIANCE:

The following measures are rendered mandatory on the effective dale of this AD.

- Introduce the following manufacturer's MMEL temporary revision into the aircraft Minimum Equipment List (MEL):

A300 TR No. 1-24/02F issue 01 approved by the DGAC on June 22, 2001

A310 TR No. 01-24/01J issue 02 approved by the DGAC on June 14, 2001

A300-600 TR No. 01-24/01I issue 02 approved by the DGAC on June 14, 2001

A300-600ST TR No. 01-24/01A issue 02 approved by the DGAC on June 14, 2001,

and conform with these directives.

REF.: MMEL Temporary Revisions:

A300 TR No. 1-24/02F issue 01

A310 TR No. 01-24/01J issue 02

A300-600 TR No. 01-24/01I issue 02

A300-600ST TR No. 01-24/01A issue 02

EFFECTIVE DATE: APRIL 13, 2002