AD 70-16-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | MD Helicopters, Inc. | 369 | Airworthiness Directives; Hughes Model 369 Series Helicopters |
| aircraft | MD Helicopters, Inc. | 369A | Airworthiness Directives; Hughes Model 369 Series Helicopters |
| aircraft | MD Helicopters, Inc. | 369H | Airworthiness Directives; Hughes Model 369 Series Helicopters |
| aircraft | MD Helicopters, Inc. | 369HE | Airworthiness Directives; Hughes Model 369 Series Helicopters |
| aircraft | MD Helicopters, Inc. | 369HM | Airworthiness Directives; Hughes Model 369 Series Helicopters |
| aircraft | MD Helicopters, Inc. | 369HS | Airworthiness Directives; Hughes Model 369 Series Helicopters |
Unsafe Condition
Failure of the main rotor blade P/N 369A1100 and P/N 369A1100-501 due to cracks or doubler peeling or separation.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Determine identification notation on blade top and bottom doublers per Hughes Service Information Notice No. HN-8. Inspect blades with 'PR-12' stamps or lacking stamps before further flight, addressing cracks or separation. Repeat inspections every 25 hours until 100 hours post-AD effective date. Remove blades from service after 100 hours time in service from AD effective date.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 25 hours time in service after the effective date of this AD
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Hughes Model 369 Series helicopters with main rotor blades P/N 369A1100 and P/N 369A1100-501, serial numbers listed in Hughes Service Information Notice No. HN-8 (November 19, 1969) or later FAA approved revision, and OH-6A Information Notices 120, 120A, 120B.
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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