AD 90-01-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | MD Helicopters, Inc. | 369 | Airworthiness Directives: MCDONNELL DOUGLAS HELICOPTER COMPANY (MDHC) Model 369 Series Helicopters (including Models YOH-6A and OH-6A) |
| aircraft | MD Helicopters, Inc. | 369A | Airworthiness Directives: MCDONNELL DOUGLAS HELICOPTER COMPANY (MDHC) Model 369 Series Helicopters (including Models YOH-6A and OH-6A) |
| aircraft | MD Helicopters, Inc. | 369D | Airworthiness Directives: MCDONNELL DOUGLAS HELICOPTER COMPANY (MDHC) Model 369 Series Helicopters (including Models YOH-6A and OH-6A) |
| aircraft | MD Helicopters, Inc. | 369E | Airworthiness Directives: MCDONNELL DOUGLAS HELICOPTER COMPANY (MDHC) Model 369 Series Helicopters (including Models YOH-6A and OH-6A) |
| aircraft | MD Helicopters, Inc. | 369F | Airworthiness Directives: MCDONNELL DOUGLAS HELICOPTER COMPANY (MDHC) Model 369 Series Helicopters (including Models YOH-6A and OH-6A) |
| aircraft | MD Helicopters, Inc. | 369FF | Airworthiness Directives: MCDONNELL DOUGLAS HELICOPTER COMPANY (MDHC) Model 369 Series Helicopters (including Models YOH-6A and OH-6A) |
| aircraft | MD Helicopters, Inc. | 369H | Airworthiness Directives: MCDONNELL DOUGLAS HELICOPTER COMPANY (MDHC) Model 369 Series Helicopters (including Models YOH-6A and OH-6A) |
| aircraft | MD Helicopters, Inc. | 369HE | Airworthiness Directives: MCDONNELL DOUGLAS HELICOPTER COMPANY (MDHC) Model 369 Series Helicopters (including Models YOH-6A and OH-6A) |
| aircraft | MD Helicopters, Inc. | 369HM | Airworthiness Directives: MCDONNELL DOUGLAS HELICOPTER COMPANY (MDHC) Model 369 Series Helicopters (including Models YOH-6A and OH-6A) |
| aircraft | MD Helicopters, Inc. | 369HS | Airworthiness Directives: MCDONNELL DOUGLAS HELICOPTER COMPANY (MDHC) Model 369 Series Helicopters (including Models YOH-6A and OH-6A) |
Unsafe Condition
Failure of the engine-to-transmission driveshaft coupling, specifically MDHC Part Number 369H5660 with serial numbers 5200 through 5309, could result in loss of control of the helicopter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect couplings (MDHC P/N 369H5660) to determine serial numbers within 25 hours' time in service or 120 days after the effective date. Replace couplings with serial numbers 5200-5309 using airworthy parts. Record compliance and serial numbers of deficient couplings in AD and maintenance records.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 25 hours' time in service or within 120 days after the effective date of the AD, whichever occurs first.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
MCDONNELL DOUGLAS HELICOPTER COMPANY (MDHC) Model 369 series helicopters including Models YOH-6A and OH-6A, certificated in any category.
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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