AD 80-25-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | MD Helicopters, Inc. | 369 | Airworthiness Directives; HUGHES HELICOPTERS Model 369 Series Helicopters |
| aircraft | MD Helicopters, Inc. | 369A | Airworthiness Directives; HUGHES HELICOPTERS Model 369 Series Helicopters |
| aircraft | MD Helicopters, Inc. | 369D | Airworthiness Directives; HUGHES HELICOPTERS Model 369 Series Helicopters |
| aircraft | MD Helicopters, Inc. | 369H | Airworthiness Directives; HUGHES HELICOPTERS Model 369 Series Helicopters |
| aircraft | MD Helicopters, Inc. | 369HE | Airworthiness Directives; HUGHES HELICOPTERS Model 369 Series Helicopters |
| aircraft | MD Helicopters, Inc. | 369HM | Airworthiness Directives; HUGHES HELICOPTERS Model 369 Series Helicopters |
| aircraft | MD Helicopters, Inc. | 369HS | Airworthiness Directives; HUGHES HELICOPTERS Model 369 Series Helicopters |
Unsafe Condition
Fatigue failure of the Hughes couplings in the tail rotor drive shaft and loss of tail rotor power.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the fore and aft tail rotor drive shaft couplings to determine their serial numbers. Remove and label as 'Unairworthy' specific couplings with listed serial numbers and replace them with like serviceable parts. Report serial numbers of suspect couplings to the FAA.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 25 hours' time in service from the effective date of this AD
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
MD Helicopters, Inc. Models 369, 369A, 369D, 369H, 369HE, 369HM, 369HS certified 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
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.