AD 63-17-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Sikorsky Aircraft Corporation | S62A | Airworthiness Directives; Sikorsky Model S-62A Helicopters |
Unsafe Condition
Input shaft helical gears, part number S6235-20158, may fail due to fatigue cracking after accumulating 250 hours' time in service, posing a risk of main transmission failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect gears per Sikorsky Service Bulletin 62B35-6 before further flight if they have 250+ hours' time in service as of the effective date. For gears with less than 250 hours, inspect before reaching 250 hours' time in service. Reinspect every 250 hours' time in service thereafter. FAA may adjust intervals with justification.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Effective upon publication in the Federal Register for most, except those made effective immediately by telegram dated August 2, 1963.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Sikorsky Model S-62A helicopters with Main Transmission Assembly part numbers S6235-20000-3 through -10.
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
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.