AD 89-22-16
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Honeywell International Inc. | TFE731-2 | GARRETT ENGINE DIVISION Models TFE731-2, -5, -5AR, and -5R Engines |
| engine | Honeywell International Inc. | TFE731-5 | GARRETT ENGINE DIVISION Models TFE731-2, -5, -5AR, and -5R Engines |
| engine | Honeywell International Inc. | TFE731-5AR | GARRETT ENGINE DIVISION Models TFE731-2, -5, -5AR, and -5R Engines |
| engine | Honeywell International Inc. | TFE731-5R | GARRETT ENGINE DIVISION Models TFE731-2, -5, -5AR, and -5R Engines |
Unsafe Condition
Uncommanded engine acceleration or deceleration due to DEEC (Digital Electronic Engine Controller) parts with specific part numbers and serial numbers.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Review engine log books to identify DEEC parts with listed serial numbers. Remove and replace DEECs with less than 50 engine hours within 25 engine operating hours, and those with 50+ hours within 100 engine operating hours. Repair and re-identify spare DEECs per SB TFE731-76-3049. Revise AFM with emergency procedures within 10 days.
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Compliance Time
Within 25 engine operating hours for DEECs with less than 50 hours time since new, and within 100 engine operating hours for those with 50+ hours, after receipt of this AD. AFM revisions required within 10 calendar days.
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Affected Aircraft
Garrett Engine Division models TFE731-2, -5, -5AR, -5R engines installed on Lear Jet M31, CASA 101, Falcon 900, Falcon 20-5, BAe 125-800 aircraft.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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