AD 92-08-51
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Honeywell International Inc. | ALF502R-3 | TEXTRON LYCOMING Model ALF502R Series Engines |
| engine | Honeywell International Inc. | ALF502R-3A | TEXTRON LYCOMING Model ALF502R Series Engines |
| engine | Honeywell International Inc. | ALF502R-4 | TEXTRON LYCOMING Model ALF502R Series Engines |
| engine | Honeywell International Inc. | ALF502R-5 | TEXTRON LYCOMING Model ALF502R Series Engines |
| engine | Honeywell International Inc. | ALF502R-6 | TEXTRON LYCOMING Model ALF502R Series Engines |
Unsafe Condition
Uncommanded in-flight engine power reduction of engines during inclement weather or icing conditions.
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Required Actions
Replace the existing engine fuel control with an improved fuel control or rework the existing engine fuel control in accordance with Textron Lycoming Alert Service Bulletin No. A-ALF 502R 73-12, Revision 1. The replacement or rework must be done at the first maintenance access of the engine fuel control or within 300 operating cycles after the effective date of this AD, whichever occurs first.
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Compliance Time
at the first maintenance access of the engine fuel control or within 300 operating cycles after the effective date of this AD, whichever occurs first
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Affected Aircraft
Textron Lycoming Model ALF502R series turbofan engines installed on British Aerospace BAe-146 airplanes.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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