AD 73-26-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Honeywell International Inc. | TSE331-3U | AIRESEARCH MANUFACTURING COMPANY OF ARIZONA Model TSE331-3U-303N Engines. |
Unsafe Condition
Abnormal wear of the fuel control drive components including the external splines of the fuel pump output shaft (P/N 868484), internal splines of the coupling (P/N 893646), and external splines of the fuel control input shaft (Woodward P/N 3499-034).
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the fuel control drive per AiResearch Service Bulletin TSE331-73-5006 within 25 hours additional time in service or before 400 hours total time, whichever is later. Adjust the fuel control overspeed governor minimum flow stop screw per Service Bulletin TSE331-73-5005 within the next 25 hours. Verify AD actions before installing spare fuel controls.
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Compliance Time
Within 25 hours additional time in service, or before accumulating 400 hours total time in service, whichever occurs later, and at intervals not to exceed 400 hours time in service thereafter for inspections. Adjustments must be within the next 25 hours time in service.
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Affected Aircraft
AIRESEARCH MANUFACTURING COMPANY OF ARIZONA Model TSE331-3U-303N engines.
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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