AD 89-02-01 R1
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | MD Helicopters, Inc. | 369D | Airworthiness Directives; MCDONNELL DOUGLAS HELICOPTER COMPANY (HUGHES HELICOPTER, INC.) Model 369D, E, F, and FF Helicopters |
| aircraft | MD Helicopters, Inc. | 369E | Airworthiness Directives; MCDONNELL DOUGLAS HELICOPTER COMPANY (HUGHES HELICOPTER, INC.) Model 369D, E, F, and FF Helicopters |
| aircraft | MD Helicopters, Inc. | 369F | Airworthiness Directives; MCDONNELL DOUGLAS HELICOPTER COMPANY (HUGHES HELICOPTER, INC.) Model 369D, E, F, and FF Helicopters |
| aircraft | MD Helicopters, Inc. | 369FF | Airworthiness Directives; MCDONNELL DOUGLAS HELICOPTER COMPANY (HUGHES HELICOPTER, INC.) Model 369D, E, F, and FF Helicopters |
Unsafe Condition
Main rotor blade retention strap assemblies (P/N 369D21210-BSC or -501) may have strap pack laminates with cracks, fractures, or corrosion leading to failure in leg or tongue areas, risking main rotor hub detachment.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect main rotor blade retention strap assemblies per specified SIN procedures every 100 hours' time in service. If two strap pack laminates fail in one leg or tongue area, reduce inspection intervals to 25 hours' time in service. Replace hub assembly if straps are rejected per criteria. Record observed damage details in maintenance records.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 100 hours' time in service and thereafter at intervals not to exceed 100 hours' time in service (or 25 hours if two laminate failures occur).
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
MCDONNELL DOUGLAS HELICOPTER COMPANY (HUGHES HELICOPTER, INC.) Model 369D, E, F, and FF helicopters with main rotor hub retention straps part number 369D21210-BSC or -501 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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