AD 96-04-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Honeywell International Inc. | ALF502L | Airworthiness Directives; AlliedSignal Inc. ALF502L Series Turbofan Engines |
| engine | Honeywell International Inc. | ALF502L-2 | Airworthiness Directives; AlliedSignal Inc. ALF502L Series Turbofan Engines |
| engine | Honeywell International Inc. | ALF502L-2A | Airworthiness Directives; AlliedSignal Inc. ALF502L Series Turbofan Engines |
| engine | Honeywell International Inc. | ALF502L-2C | Airworthiness Directives; AlliedSignal Inc. ALF502L Series Turbofan Engines |
| engine | Honeywell International Inc. | ALF502L-3 | Airworthiness Directives; AlliedSignal Inc. ALF502L Series Turbofan Engines |
Unsafe Condition
Disk failure, which could result in an inflight engine shutdown and extensive engine damage.
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Required Actions
Remove from service stage 1 and stage 3-7 compressor disks, and stage 2 turbine disks in accordance with the drawdown schedule and procedures described in Service Bulletin ALF502L 72-281. Establish new reduced retirement life limits for these disks in accordance with Service Bulletin ALF 502 72-0004, Revision 12.
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Compliance Time
Required as indicated, unless accomplished previously.
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Affected Aircraft
AlliedSignal Inc. (formerly Textron Lycoming) ALF502L, L-2, L-2A, L-2C, and L-3 turbofan engines installed on but not limited to Canadair Challenger CL600 series aircraft.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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