AD 93-18-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | MD Helicopters, Inc. | 369D | Airworthiness Directives; MCDONNELL DOUGLAS HELICOPTER COMPANY and HUGHES HELICOPTERS, INC. Model 369D, 369E, 369F, 369FF, and 369H Series Helicopter |
| aircraft | MD Helicopters, Inc. | 369E | Airworthiness Directives; MCDONNELL DOUGLAS HELICOPTER COMPANY and HUGHES HELICOPTERS, INC. Model 369D, 369E, 369F, 369FF, and 369H Series Helicopter |
| aircraft | MD Helicopters, Inc. | 369F | Airworthiness Directives; MCDONNELL DOUGLAS HELICOPTER COMPANY and HUGHES HELICOPTERS, INC. Model 369D, 369E, 369F, 369FF, and 369H Series Helicopter |
| aircraft | MD Helicopters, Inc. | 369FF | Airworthiness Directives; MCDONNELL DOUGLAS HELICOPTER COMPANY and HUGHES HELICOPTERS, INC. Model 369D, 369E, 369F, 369FF, and 369H Series Helicopter |
| aircraft | MD Helicopters, Inc. | 369H | Airworthiness Directives; MCDONNELL DOUGLAS HELICOPTER COMPANY and HUGHES HELICOPTERS, INC. Model 369D, 369E, 369F, 369FF, and 369H Series Helicopter |
Unsafe Condition
A blocked fuel vent line in the fuel vent line emergency shutoff valve assembly can cause erroneously high inflight fuel quantity indications.
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Required Actions
Inspect the fuel vent line emergency shutoff valve per Service Information Notice HN-234. If the valve is incorrectly closed or obstructed, install an airworthy assembly before further flight. Install improved assembly P/N 369H8108-505 or higher dash number within specified time limits.
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Compliance Time
Helicopters with less than 2,400 hours' time-in-service on the effective date must inspect on or before 2,500 hours' time-in-service, then every 100 hours' time-in-service until improved assembly is installed. Helicopters with 2,400+ hours' time-in-service must inspect within next 100 hours' time-in-service, then every 100 hours' until improved assembly installed. Improved assembly must be installed by next 600 hours' (for 2,400+ hours) or before 3,000 hours' (for less than 2,400 hours).
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Affected Aircraft
MCDONNELL DOUGLAS HELICOPTER COMPANY and HUGHES HELICOPTERS, INC. Model 369D, 369E (Serial No. 0001E thru 0508E), 369F (Serial No. 0003 thru 0091), 369FF (Serial No. 0003 thru 0091), and 369H series helicopters with fuel vent line emergency shutoff valve assemblies P/N 369H8108, 369H8108-501, or 369H8108-503.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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