AD 76-20-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Hiller Aviation | Siam Hiller Holdings, Inc. | UH-12D | Airworthiness Directives; Hiller Models UH-12D and UH-12E Helicopters |
| aircraft | Hiller Aviation | Siam Hiller Holdings, Inc. | UH-12E | Airworthiness Directives; Hiller Models UH-12D and UH-12E Helicopters |
Unsafe Condition
Freezing of the governor cable, throttle cable, and/or anti-ice cable could lead to loss of helicopter control.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Install a placard prohibiting flight in outside air temperatures of 32 degrees F or lower within 15 days time in service. Perform modifications per Soloy Conversions, Ltd. Service Bulletin 01-560 or approved revisions within 60 days time in service. The placard may be removed after completing the modifications.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 15 days time in service after receipt of this telegraphic AD (for placard installation) and within 60 days time in service after receipt (for modifications).
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Hiller Models UH-12D and UH-12E helicopters converted to turbine power under Soloy Conversions STC Nos. SH177WE and SH178WE.
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.