AD 77-09-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | MD Helicopters, Inc. | 369H | Airworthiness Directives; Hughes Model 369H Series Helicopters |
Unsafe Condition
Failure of the emergency float solenoid valve to operate due to corrosion of the solenoid valve plunger.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace the TAVCO, INC. solenoid valve assembly P/N 23111357 with Air Cruiser's P/N D17753-107 valve assembly, or use Valcor Eng. Corp solenoid valve P/N V48800-02, or an equivalent modification approved by the Chief, Aircraft Engineering Division, FAA Western Region, following FAA approved Hughes Service Information Notice No. HN-114 or later revision.
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Compliance Time
within 100 flight-hours time in service or within 30 days from effective date of this AD, whichever is sooner
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Affected Aircraft
Hughes Model 369H Series Helicopters certificated in all categories, configured with emergency float assemblies Hughes P/N 369H92036-1 and 369H92036-2.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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