AIRWORTHINESS DIRECTIVE

For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CASR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.

Airbus Industrie A319, A320 and A321 Series Aeroplanes

AD/A320/149 Inertial Reference Systems 9/2003

DM

Applicability: All Model A319, A320 and A321 series aeroplanes, all manufacturing serial numbers (MSN) equipped with Honeywell inertial reference system (IRS) having the following part numbers (P/N) but without Airbus Industrie modification 30652, 30941 or 30942 incorporated:

HG1150AC05 HG1150AC06 HG2030AC05 HG2030AC06

HG2030AC08 HG2030AC09 HG2030AD09

Requirement: Incorporate Temporary Revision (TR) 2.05.00/52 into the Aircraft Flight Manual (AFM). TR 2.05.00/52 introduces an operational limitation which prohibits ‘AUTOLAND’ and ‘ROLL-OUT’ at the following airports from the date indicated:

Airport

Airport Location Year Month

Airbus Industrie A319, A320 and A321 Series Aeroplanes

AD/A320/149 (continued)

CAT II approaches without ‘AUTOLAND’ are still permitted.

Note: DGAC AD 2003-270(B) refers.

Compliance: As of the effective date of this Directive until Airbus Industrie Service Bulletins (SB) A320-34-1231 or A320-34-1249 or A320-34-1240, which install IRS P/N

HG1150AC07, P/N HG2030AD11 and P/N HG2030AC11 respectively, have been embodied.

This Airworthiness Directive becomes effective on 2 August 2003.

Background: The magnetic variation tables, which are implemented in the Honeywell IRSs identified in the applicability statement, are obsolete in certain countries.

Studies have shown that, for a given airport, a difference greater than 3° between the real magnetic deviation and the one implemented in the inertial reference system could lead to an unsafe situation during the phases of CAT II or III automatic landing and roll out.

This Directive effectively limits the use of ‘AUTOLAND’ and ‘ROLL-OUT’ at certain airports until IRSs are replaced.

Jim Coyne

Delegate of the Civil Aviation Safety Authority 23 July 2003

The above AD is notified in the Commonwealth of Australia Gazette on 30 July 2003.