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.
International Aero Engines AG V2500 series
AD/V2500/1 Critical Life Limited Parts 10/2004
Applicability: International Aero Engines AG (IAE) V2500-A1, V2522-A5, V2524-A5, V2525-D5, V2527- A5, V2527E-A5, V2527M-A5, V2528-D5, V2530-A5, and V2533-A5
turbofan engines.
Note 1: These engines are installed on, but not limited to, Airbus Industrie A319, A320, and A321 series, and McDonnell Douglas MD-90 aeroplanes.
Requirement: Revise the Airworthiness Limitations Section (ALS) and Maintenance Scheduling Section (MSS) of the Instructions for Continued Airworthiness (ICA) located in the Time Limits Manual (Chapter 05- 10-00) of the Engine Manuals, part number (P/N) E-V2500-1IA and P/N E-V2500-3IA, and for air carrier operations revise the approved continuous airworthiness maintenance program, by
(a) Adding the following to paragraph 1, entitled "Airworthiness Limitations:" "Refer to paragraph 2--Maintenance Scheduling for information that sets forth the operator's maintenance requirements for the V2500 On-Condition engine."
(b) Adding the following to paragraph 2, entitled "Maintenance Scheduling:"
"Whenever a Group A part identified in this paragraph (see 4.0 for definition of Group A) satisfies both of the following conditions:
The part is considered completely disassembled when accomplished in accordance with the disassembly instructions in the engine manufacturer's engine manual; and
The part has accumulated more than 100 cycles in service since the last piece- part opportunity inspection, provided that the part was not damaged or related to the cause for its removal from the engine; then that part is considered to be at the piece-part level and it is mandatory to perform the inspections for that part as specified in the following table:
Part nomenclature | Part number (P/N) | Inspect per engine manual chapter |
Fan Disk | All | Chapter 72-31-12, Subtask 72-31- 12-230-054. |
Stage 1 HP Turbine Hub | All | Chapter 72-45-11, Task 72-45-11- 200-002. |
Stage 2 HP Turbine Hub | All | Chapter 72-45-31, Task 72-45-31- 200-004. |
High Pressure Compressor (HPC) Stage 3-8 Drum. | All | Chapter 72-41-11, Subtask 72-41- 11-230-104. |
HPC Stage 9-12 Drum | All | Chapter 72-41-12, Subtask 72-41- 12-230-079. |
HPC Rear Shaft | All | Chapter 72-41-13, Subtask 72-41- 13-230-097 & 72-41-13-230-098. |
HPC Stage Rear Rotating Seal | All | Chapter 72-41-14, Subtask 72-41- 14-230-064 & 72-41-14-230-065. |
Stages 3 through 7 Low Pressure Turbine (LPT) Disks. | All | Chapter 72-50-31, Task 72-50-31- 200-006. |
Note 2: FAA AD 2004-12-08 Amdt 39-13667 refers.
Note 3: The requirements of this Directive have been met when the engine manual changes are made and operators have modified their systems of maintenance to reflect the requirements in the Engine Manuals.
Compliance: Within the next 90 days after the effective date of this Directive.
This Airworthiness Directive becomes effective on 30 September 2004.
Background: The actions specified by this AD are intended to prevent critical life-limited rotating engine part failure, which could result in an uncontained engine failure and damage to the aeroplane.
Bernard Malcolm Hole
Delegate of the Civil Aviation Safety Authority 30 July 2004
The above AD is notified in the Commonwealth of Australia Gazette on 8 September 2004.
Overview
The Civil Aviation Safety Authority (CASA) issued Airworthiness Directive AD/V2500/1 on 30 July 2004 to address a safety concern related to the V2500 series engines manufactured by International Aero Engines AG. This directive is aimed at mitigating the risk of uncontained engine failure caused by critical life-limited rotating parts, which could potentially lead to severe damage to the aircraft. The AD mandates revisions to the Airworthiness Limitations Section and Maintenance Scheduling Section in the Instructions for Continued Airworthiness located in the Time Limits Manual of the engine manuals, as well as adjustments to the approved continuous airworthiness maintenance program for air carriers. The directive requires these changes to be implemented within 90 days of its effective date of 30 September 2004. The policy objective of this directive is to enhance the safety of air operations by ensuring that the maintenance schedules and procedures are adequate to prevent failures of critical engine components.
Scope and Application
This Airworthiness Directive (AD) issued by the Civil Aviation Safety Authority (CASA) under the Civil Aviation Regulations 1998 applies specifically to International Aero Engines AG (IAE) V2500 series turbofan engines, including models V2500-A1, V2522-A5, V2524-A5, V2525-D5, V2527-A5, V2527E-A5, V2527M-A5, V2528-D5, V2530-A5, and V2533-A5. These engines are primarily installed in Airbus Industrie A319, A320, and A321 series, as well as McDonnell Douglas MD-90 aeroplanes. The directive mandates revisions to the Airworthiness Limitations Section (ALS) and Maintenance Scheduling Section (MSS) of the Instructions for Continued Airworthiness (ICA) in the Time Limits Manual of the Engine Manuals. For air carrier operations, it also requires changes to the approved continuous airworthiness maintenance program. The primary aim of these revisions is to address potential critical life-limited rotating engine part failures that could lead to uncontained engine failure and subsequent damage to the aircraft. The AD stipulates specific inspection requirements for certain engine parts, such as the fan disk, HP turbine hubs, and various compressor drums, if they meet particular cycle and condition criteria. Compliance with these new requirements is mandated within 90 days of the AD's effective date, which is 30 September 2004.
Key Provisions
The Airworthiness Directive (AD) issued by the Civil Aviation Safety Authority (CASA) under subregulation 39.1 (1) of the Civil Aviation Safety Regulations 1998 (CASR 1998) pertains to the V2500 series turbofan engines manufactured by International Aero Engines AG (IAE). This AD specifically applies to engines of types V2500-A1, V2522-A5, V2524-A5, V2525-D5, V2527-A5, V2527E-A5, V2527M-A5, V2528-D5, V2530-A5, and V2533-A5 (section 1). These engines are commonly used in Airbus Industrie A319, A320, and A321 series, as well as McDonnell Douglas MD-90 aeroplanes.
The AD mandates that the Airworthiness Limitations Section (ALS) and Maintenance Scheduling Section (MSS) of the Instructions for Continued Airworthiness (ICA) in the Time Limits Manual of the Engine Manuals, specifically part numbers E-V2500-1IA and E-V2500-3IA, be revised (section 2). For air carrier operations, the approved continuous airworthiness maintenance program must also be revised. The directive requires the addition of specific instructions under the ALS and MSS. These instructions clarify that operators must refer to the Maintenance Scheduling section for information on maintenance requirements for the V2500 On-Condition engine (section 2(a)). Additionally, the directive mandates that when a Group A part has accumulated more than 100 cycles since the last piece-part opportunity inspection, it must undergo inspections as specified in the AD (section 2(b)).
The AD imposes specific obligations on the operators and maintainers of the affected aircraft. Operators and maintainers must ensure that the ALS and MSS in the Time Limits Manual are revised to include the new instructions. These revisions must be implemented within 90 days of the AD's effective date, which is 30 September 2004 (section 3). The AD also requires operators to update their continuous airworthiness maintenance programs to reflect these changes.
Failure to comply with the AD may result in serious consequences. The AD is designed to prevent critical life-limited rotating engine part failures that could lead to uncontained engine failure and damage to the aeroplane. Non-compliance with the AD may result in the grounding of the affected aircraft until the required actions are taken. The AD is issued under the authority of the Civil Aviation Safety Regulations 1998, and CASA can take enforcement actions against entities that fail to comply. The AD does not specify a particular penalty, but non-compliance could potentially result in civil or criminal penalties under the relevant aviation legislation.