AD 75-15-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Schweizer Aircraft Corporation | 269A | Airworthiness Directives; Hughes Model 269A, 269A-1, and 269B Helicopters |
| aircraft | Schweizer Aircraft Corporation | 269A-1 | Airworthiness Directives; Hughes Model 269A, 269A-1, and 269B Helicopters |
| aircraft | Schweizer Aircraft Corporation | 269B | Airworthiness Directives; Hughes Model 269A, 269A-1, and 269B Helicopters |
Unsafe Condition
Cracking and separation of aluminum throttle gear sector, P/N 269A7223 (Basic), with nominal 129 degrees of teeth, leading to possible loss of control of the throttle and engine power.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect throttle sector gears to determine material type and included angle. Remove aluminum gear sectors with 129-degree teeth and install steel type throttle gearshaft assemblies (P/N 269A7707-3(L.H.), P/N 269A7707-7(L.H.), or P/N 269A7269-3(R.H.)). Perform inspections and replacements as specified, including one-time inspection between 250 and 300 hours additional time in service.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 25 hours additional time in service after the effective date of this AD.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Schweizer Aircraft Corporation Model 269A, 269A-1, and 269B helicopters, including military TH-55A helicopters.
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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