AD 74-20-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | MD Helicopters, Inc. | 369 | Airworthiness Directives; Hughes Model 369, 369A, 369H, 369HE, 369HS and 369HM Helicopters |
| aircraft | MD Helicopters, Inc. | 369A | Airworthiness Directives; Hughes Model 369, 369A, 369H, 369HE, 369HS and 369HM Helicopters |
| aircraft | MD Helicopters, Inc. | 369H | Airworthiness Directives; Hughes Model 369, 369A, 369H, 369HE, 369HS and 369HM Helicopters |
| aircraft | MD Helicopters, Inc. | 369HE | Airworthiness Directives; Hughes Model 369, 369A, 369H, 369HE, 369HS and 369HM Helicopters |
| aircraft | MD Helicopters, Inc. | 369HM | Airworthiness Directives; Hughes Model 369, 369A, 369H, 369HE, 369HS and 369HM Helicopters |
| aircraft | MD Helicopters, Inc. | 369HS | Airworthiness Directives; Hughes Model 369, 369A, 369H, 369HE, 369HS and 369HM Helicopters |
Unsafe Condition
Cracks, gouges, nicks, and scratches in the main rotor blade trailing edge could result in blade failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect main rotor blade trailing edge per Hughes Service Information Notice HN-73 or FAA-approved revisions. Remove blade from service if cracks are found. Replace or repair blade if gouges, nicks, or scratches are found, prior to further flight. Equivalent procedures may be approved by FAA.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 25 hours of helicopter operation after the effective date of this AD, unless already accomplished within the last 75 hours of helicopter operation, and thereafter at intervals not to exceed 100 hours of helicopter operation from the last inspection.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Hughes Model 369, 369A, 369H, 369HE, 369HS, and 369HM helicopters certificated in all categories.
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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