AD 94-18-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | MD Helicopters, Inc. | 369 | Airworthiness Directives; McDonnell Douglas Helicopter Company and Hughes Helicopters, Inc. Model 369, 369A (OH-6A), 369D, E, F, FF, H, HE, HS, and HM Series Helicopters |
| aircraft | MD Helicopters, Inc. | 369A | Airworthiness Directives; McDonnell Douglas Helicopter Company and Hughes Helicopters, Inc. Model 369, 369A (OH-6A), 369D, E, F, FF, H, HE, HS, and HM Series Helicopters |
| aircraft | MD Helicopters, Inc. | 369D | Airworthiness Directives; McDonnell Douglas Helicopter Company and Hughes Helicopters, Inc. Model 369, 369A (OH-6A), 369D, E, F, FF, H, HE, HS, and HM Series Helicopters |
| aircraft | MD Helicopters, Inc. | 369E | Airworthiness Directives; McDonnell Douglas Helicopter Company and Hughes Helicopters, Inc. Model 369, 369A (OH-6A), 369D, E, F, FF, H, HE, HS, and HM Series Helicopters |
| aircraft | MD Helicopters, Inc. | 369F | Airworthiness Directives; McDonnell Douglas Helicopter Company and Hughes Helicopters, Inc. Model 369, 369A (OH-6A), 369D, E, F, FF, H, HE, HS, and HM Series Helicopters |
| aircraft | MD Helicopters, Inc. | 369FF | Airworthiness Directives; McDonnell Douglas Helicopter Company and Hughes Helicopters, Inc. Model 369, 369A (OH-6A), 369D, E, F, FF, H, HE, HS, and HM Series Helicopters |
| aircraft | MD Helicopters, Inc. | 369H | Airworthiness Directives; McDonnell Douglas Helicopter Company and Hughes Helicopters, Inc. Model 369, 369A (OH-6A), 369D, E, F, FF, H, HE, HS, and HM Series Helicopters |
| aircraft | MD Helicopters, Inc. | 369HE | Airworthiness Directives; McDonnell Douglas Helicopter Company and Hughes Helicopters, Inc. Model 369, 369A (OH-6A), 369D, E, F, FF, H, HE, HS, and HM Series Helicopters |
| aircraft | MD Helicopters, Inc. | 369HM | Airworthiness Directives; McDonnell Douglas Helicopter Company and Hughes Helicopters, Inc. Model 369, 369A (OH-6A), 369D, E, F, FF, H, HE, HS, and HM Series Helicopters |
| aircraft | MD Helicopters, Inc. | 369HS | Airworthiness Directives; McDonnell Douglas Helicopter Company and Hughes Helicopters, Inc. Model 369, 369A (OH-6A), 369D, E, F, FF, H, HE, HS, and HM Series Helicopters |
Unsafe Condition
Separation of the tail rotor blade abrasion strip and subsequent tail rotor separation, leading to loss of control of the helicopter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Before first flight daily, visually check abrasion strips for debonding. If debonding is found, remove blade, perform dye-penetrant and tap-test inspections, and replace blade if debonding exists. Within 25 hours time-in-service or 7 calendar days after AD effective date, whichever comes first, inspect blades, install rivets if no debonding, or replace blades with riveted ones if debonding exists.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 25 hours time-in-service or on or before 7 calendar days after the effective date of this AD, whichever comes first.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
McDonnell Douglas Helicopter Company and Hughes Helicopters, Inc. Models 369, 369A (OH-6A), 369D, E, F, FF, H, HE, HS, HM series helicopters with specified tail rotor blades (part numbers 421-088; 369A1613-7, -503, -505; 369D21606; 369D21613-11, -31, -41, -51; 369D21615, -21; or 369A1613-3M, including suffixes like 'M' or 'M-STC').
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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