AD 77-19-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | MD Helicopters, Inc. | 369D | Airworthiness Directives; Hughes Model 369D Helicopters |
Unsafe Condition
Failure of the main rotor retention straps can result in loss of a main rotor blade.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Visually inspect the lead leg of each main rotor retention strap pack P/N 369D21210 at the inboard ends to check for two adjacent metallic anti-fretting laminates P/N 369D21271-5, -51, -53, or -55. Depending on inspection results, either repeat inspections every 25 hours of time in service, further inspect adjacent laminates, or replace the main rotor hub P/N 369D21200 before further flight or within ten hours time in service.
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Compliance Time
Before further flight after the effective date of the AD
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Affected Aircraft
Hughes Model 369D helicopters with P/N 369D21200 main rotor hub serial numbers 0001 through 0178 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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