AD 99-15-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Honeywell International Inc. | ALF502R-3A | Airworthiness Directives; AlliedSignal Inc. (formerly Textron Lycoming) Model ALF502R-5 and ALF502R-3A Turbofan Engines |
| engine | Honeywell International Inc. | ALF502R-5 | Airworthiness Directives; AlliedSignal Inc. (formerly Textron Lycoming) Model ALF502R-5 and ALF502R-3A Turbofan Engines |
Unsafe Condition
Ice accretion on the fan core inlet stator vane surfaces can result in engine rollback and loss of thrust control in icing conditions.
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Required Actions
Incorporate an improved fan core inlet anti-ice system at the next shop visit, but no later than December 31, 2002. Install aircraft modifications specified by BAe SB No. 71-68-01581A and BAe SB No. 26-40-01601A, Revision 1, prior to installing modified engines on BAe 146 aircraft.
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Compliance Time
Before further flight, but no later than December 31, 2002.
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Affected Aircraft
AlliedSignal Inc. (formerly Textron Lycoming) Model ALF502R-5 and ALF502R-3A turbofan engines.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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