AD 2019-12-18
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Robinson | Helicopter Company | Airworthiness Directives; Robinson Helicopter Company Helicopters |
Unsafe Condition
Separation between the outer and inner layers of the engine air induction hose (hose) part number (P/N) A785-31, which could result in blockage of air flow to the engine, engine stoppage, and subsequent loss of control of the helicopter.
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Required Actions
Inspecting the inside of the hose for separation between the outer and inner layers, and flexing the hose in all directions while listening for a crinkling sound, which is an indication of separation. If there is any separation or a crinkling sound, replace the hose before further flight. If there is no separation and no crinkling sound, replace the hose within 50 hours TIS. Installing on any helicopter a hose P/N A785-31 marked with code 1Q18 is prohibited.
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Compliance Time
Within 10 hours TIS
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Affected Aircraft
Robinson R44 II helicopters serial numbers (S/N) 14248 through 14268 and 14270 through 14286 or with a hose P/N A785-31 installed after April 30, 2018.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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