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)
GVAC | Sal Amilcar Cabral - Cape Verde | 2006 | Apr |
EGAA | Belfast Aldergrove - United Kingdom | 2006 | May |
EINN | Shannon - Ireland | 2006 | May |
EIDW | Dublin - Ireland | 2006 | Jul |
SAEZ | Buenos Aires Ezeiza - Argentina | 2006 | Jul |
EGPF | Glasgow - United Kingdom | 2006 | Aug |
EICK | Cork - Ireland | 2006 | Sep |
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.
Overview
The Civil Aviation Safety Authority (CASA) introduced the Airworthiness Directive (AD) for Airbus Industrie A319, A320 and A321 series aeroplanes in 2003 to address the issue of potentially unsafe magnetic variation tables in the Honeywell inertial reference systems (IRS). This AD, titled AD/A320/149, applies to all A319, A320 and A321 series aeroplanes equipped with specific Honeywell IRS part numbers, excluding those with particular Airbus modifications. The directive was issued under subregulation 39.1(1) of the Civil Aviation Safety Regulations 1998, aiming to ensure that aeroplanes remain airworthy by correcting an unsafe condition. The AD mandates that airlines incorporate a Temporary Revision into their Aircraft Flight Manual to prohibit the use of ‘AUTOLAND’ and ‘ROLL-OUT’ at certain airports, identified in the directive, until the specified Airbus Service Bulletins are implemented, thereby ensuring compliance with updated safety standards.
Scope and Application
The Airworthiness Directive (AD) AD/A320/149 issued under the Civil Aviation Safety Regulations 1998 applies specifically to Airbus Industrie A319, A320 and A321 series aeroplanes equipped with certain Honeywell inertial reference systems (IRS) and without Airbus Industrie modifications 30652, 30941, or 30942 incorporated. This AD pertains to all manufacturing serial numbers (MSN) of the specified aircraft models that have IRS with part numbers HG1150AC05, HG1150AC06, HG2030AC05, HG2030AC06, HG2030AC08, HG2030AC09, or HG2030AD09. The requirement mandates that Temporary Revision 2.05.00/52 be incorporated into the Aircraft Flight Manual (AFM) to introduce an operational limitation that prohibits the use of ‘AUTOLAND’ and ‘ROLL-OUT’ at specified airports from certain dates due to discrepancies in magnetic variation tables. The AD is effective until Airbus Industrie Service Bulletins A320-34-1231, A320-34-1249, or A320-34-1240, which incorporate newer IRS parts, are implemented. This directive, effective from 2 August 2003, is applicable nationally within the jurisdiction of the Australian Commonwealth as overseen by the Civil Aviation Safety Authority (CASA).
Key Provisions
This Airworthiness Directive (AD), specifically AD/A320/149, applies to all Airbus Industrie A319, A320, and A321 series aeroplanes equipped with certain Honeywell inertial reference systems (IRS) but not incorporating Airbus Industrie modifications 30652, 30941, or 30942. The directive mandates that the action outlined in the requirement section be taken in specific circumstances and in accordance with the instructions provided. This action must be completed by the time specified in the compliance section.
The requirement section of AD/A320/149 instructs that Temporary Revision (TR) 2.05.00/52 be incorporated into the Aircraft Flight Manual (AFM). TR 2.05.00/52 imposes an operational limitation prohibiting the use of ‘AUTOLAND’ and ‘ROLL-OUT’ at certain airports from specified dates, due to discrepancies in the magnetic variation tables implemented in the Honeywell IRSs. These airports include, but are not limited to, GVAC (Sal Amilcar Cabral - Cape Verde), EGAA (Belfast Aldergrove - United Kingdom), EIND (Shannon - Ireland), EIDW (Dublin - Ireland), SAEZ (Buenos Aires Ezeiza - Argentina), EGPF (Glasgow - United Kingdom), and EICT (Cork - Ireland). It is important to note that CAT II approaches without ‘AUTOLAND’ are still permitted.
The obligations imposed by this AD are for the operators and owners of the affected aircraft to ensure that the specified changes are incorporated into their aircraft's AFM. This includes following the instructions set out in TR 2.05.00/52, which mandates the prohibition of ‘AUTOLAND’ and ‘ROLL-OUT’ at the listed airports from the given dates. Compliance must be achieved until Airbus Industrie Service Bulletins A320-34-1231, A320-34-1249, or A320-34-1240 are incorporated, which involve the installation of the specified IRS parts.
Failure to comply with this Airworthiness Directive may result in serious consequences. Specifically, operating an aircraft in contravention of the AD may lead to enforcement actions by the Civil Aviation Safety Authority (CASA). The exact penalties for non-compliance are not stated in the AD, but they could include fines, suspension or revocation of airworthiness certificates, or other regulatory sanctions. The seriousness of the potential safety risks involved underscores the importance of adhering to the requirements of this directive.