AIRWORTHINESS DIRECTIVE

CAA-AD-009/1999

Date of issue: January 20, 2000

AIRCRAFT - FLIGHT CONTROL - INSPECTION

Applicability: AIRBUS INDUSTRIE A310 aircraft, all certified models, all serial numbers except for:

- aircraft on which AIRBUS INDUSTRIE modification No.10855 has been embodied in production or,

- aircraft on which AIRBUS INDUSTRIE Service Bulletin A310-27-2075 Revision 01 has been embodied in service.

Effective date: February 24, 2000

Compliance: Required as indicated in DGAC AD 1999-510-299.

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.: 1999-510-299(B)

AIRBUS INDUSTRIE

A310 aircraft

Flight controls - Flap control screw jack No.1 (ATA 27)

APPLICABILITY:

AIRBUS INDUSTRIE A310 aircraft, all certified models, all serial numbers except for:

- aircraft on which AIRBUS INDUSTRIE modification No.10855 has been embodied in production or,

- aircraft on which AIRBUS INDUSTRIE Service Bulletin A310-27-2075 Revision 01 has been embodied in service.

REASONS:

During a routine maintenance inspection on flap control screw jack No. 1, an operator discovered a fracture of the lead screw, the mechanical integrity of the screw jack then being ensured only by its failsafe tie-rod.

An in-depth inspection of the fleet revealed other cases of broken or cracked lead screws.

Such situations are generated by an interference between the ball nut and the connecting fork subsequent to installation of the ball nut offset by 180o after a maintenance operation.

In order to prevent such situations, modification of the ball nut by the installation of a foolproofing device is rendered mandatory by this Airworthiness Directive.

ACTIONS:

Before June 30, 2001, modify the flap control screw jacks No.1 in compliance with the instructions of AIRBUS INDUSTRIE Service Bulletin A310-27-2075 Revision 01.

REF.: AIRBUS INDUSTRIE Service Bulletin

A310-27-2075 Revision 01

(or all later approved revisions).

EFFECTIVE DATE: JANUARY 08, 2000