Effective date: Upon receipt.

Compliance: Required as indicated in DGAC AD 1998-263-255(B) R3.

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.

AIRBUS INDUSTRIE A300, A310 and A300-600 aircraft, all certified models and all serial numbers, except:

- aircraft on which AIRBUS INDUSTRIE modification (Mod.) No. 12012 has been embodied in production,

- aircraft on which AIRBUS INDUSTRIE Service Bulletin (SB) A300-32-0429 or A310-32-2113 or A300-32-6075 has been embodied in operation.

This Airworthiness Directive (AD) is prompted by a recent event of an alternate braking system loss leading an A320 aircraft to go beyond the end of the runway at landing. This event was due to the freezing in flight of water ingressed in the bottom of the Braking Dual Distribution Valve (BDDV) preventing the alternate braking mode to operate at landing.

The purpose of Revision 3 of this AD is to take into account a new production modification and associated SB (Mod. No.12012). This revision limits the applicability requirements of the AD.

In order to detect a possible loss of the alternate braking system resulting from a possible in flight seizure of a BDDV due to water freezing, the functional test and, when necessary, the associated maintenance tasks described in Paragraph 4 of AIRBUS INDUSTRIE AOT 32-19 Revision 2 dated August 20, 1998 must be applied and the results must be reported to AIRBUS INDUSTRIE.

NOTE: Enquiries regarding the technical content of this AD should be made to:

DGAC France, SFACT/N.AT:DGAC/SFACT/N.AT50 rue Henry Farman75720 PARIS CEDEX 15Tel: (33) 1 58 09 45 09 - Fax: (33) 1 58 09 42 20 (or 43 19)or toAIRBUS INDUSTRIE AI/EA:1 Rond Point Maurice Bellonte31707 BLAGNAC CEDEX - France

Tel: (33) 5 61 93 48 01 - Fax: (33) 5 61 93 44 51

REF.: AIRBUS INDUSTRIE AOT 32-19 Revision 2 dated August 20, 1998.

AIRBUS INDUSTRIE Service Bulletin: A300-32-0429, A310-32-2113, A300-32-6075

(original issue or any later approved revision).

This Revision 3 replaces the AD 98-263-255(B) R2 dated August 26, 1998.

Original AD: Upon receipt of telegraphic diffusion issued on JULY 08, 1998Revision 1: Upon receipt of telegraphic diffusion issued on d JULY 17, 1998Revision 2: Upon receipt from AUGUST 26, 1998Revision 3: Upon receipt from DECEMBER 29, 1999