AD 73-11-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Schweizer Aircraft Corporation | 269C | Airworthiness Directives; Hughes Model 269C Helicopters |
Unsafe Condition
Failure of idler pulley bearings, P/N 269A5050-62, which could result in loss of tail rotor drive system function.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace idler pulley bearings with new P/N 269A5050-62 and perform inspections per Hughes Service Information Notice No. N-90.1 or later FAA-approved revisions. Repeat replacement and inspection at or before 600 hours total time in service on the bearings.
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Compliance Time
Within 50 hours additional time in service after the effective date of this AD, or before the accumulation of 600 hours total time in service, whichever occurs later.
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Affected Aircraft
Schweizer Aircraft Corporation Model 269C helicopters with serial numbers 0004 through 0092 listed in Hughes Service Information Notice No. N-90.1, and other Model 269C helicopters with idler pulley bearings P/N 269A5050-62 installed.
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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