AD 89-23-14
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | MD Helicopters, Inc. | 369 | Airworthiness Directives; MCDONNELL DOUGLAS HELICOPTER COMPANY (MDHC) Model 369 Series Helicopters |
| aircraft | MD Helicopters, Inc. | 369A | Airworthiness Directives; MCDONNELL DOUGLAS HELICOPTER COMPANY (MDHC) Model 369 Series Helicopters |
| aircraft | MD Helicopters, Inc. | 369D | Airworthiness Directives; MCDONNELL DOUGLAS HELICOPTER COMPANY (MDHC) Model 369 Series Helicopters |
| aircraft | MD Helicopters, Inc. | 369E | Airworthiness Directives; MCDONNELL DOUGLAS HELICOPTER COMPANY (MDHC) Model 369 Series Helicopters |
| aircraft | MD Helicopters, Inc. | 369F | Airworthiness Directives; MCDONNELL DOUGLAS HELICOPTER COMPANY (MDHC) Model 369 Series Helicopters |
| aircraft | MD Helicopters, Inc. | 369FF | Airworthiness Directives; MCDONNELL DOUGLAS HELICOPTER COMPANY (MDHC) Model 369 Series Helicopters |
| aircraft | MD Helicopters, Inc. | 369H | Airworthiness Directives; MCDONNELL DOUGLAS HELICOPTER COMPANY (MDHC) Model 369 Series Helicopters |
| aircraft | MD Helicopters, Inc. | 369HE | Airworthiness Directives; MCDONNELL DOUGLAS HELICOPTER COMPANY (MDHC) Model 369 Series Helicopters |
| aircraft | MD Helicopters, Inc. | 369HM | Airworthiness Directives; MCDONNELL DOUGLAS HELICOPTER COMPANY (MDHC) Model 369 Series Helicopters |
| aircraft | MD Helicopters, Inc. | 369HS | Airworthiness Directives; MCDONNELL DOUGLAS HELICOPTER COMPANY (MDHC) Model 369 Series Helicopters |
Unsafe Condition
Fatigue failure of the control tubes could result in loss of control of the helicopter.
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Required Actions
Inspect swaged ends of control tubes for cracks within 25 hours' time in service after the effective date and every 100 hours' time in service until paragraph (c) is completed. Replace cracked tubes with serviceable units before further flight. Inspect spare control tubes from inventory and reject cracked ones. Within 600 hours' time in service after the effective date, inspect and replace cracked tubes with FAA-approved -5 configuration parts or modify BASIC (BSC) tubes to the -5 configuration before reinstallation.
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Compliance Time
Within 25 hours' time in service after the effective date of this AD, and at intervals of 100 hours' time in service until the requirements of paragraph (c) are accomplished
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Affected Aircraft
MCDONNELL DOUGLAS HELICOPTER COMPANY (MDHC) Model 369 series helicopters with main rotor collective tube P/N 369A7009-BSC, longitudinal control tube P/N 369A7011-BSC, lateral control tube P/N 369A7012-BSC, and tail rotor control tube P/N 369A7007-BSC.
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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