AD 2020-18-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Robinson | Various | Airworthiness Directives; Robinson Helicopter Company |
Unsafe Condition
Separation between the outer and inner layers of the orange silicone hose P/N A785-31, which can result in blockage of air flow to the engine, engine stoppage, and subsequent loss of control of the helicopter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the inside of the hose for separation between the outer and inner layers, and flex the hose in all directions while listening for a crinkling sound. If there is any separation or a crinkling sound, remove the hose from service before further flight. If there is no separation and no crinkling sound, and the hose is marked with code 3Q17 or 1Q18 or the code marking is illegible, remove the hose from service within 50 hours TIS. Perform the inspection of the inside of the hose at intervals not to exceed 100 hours TIS or at each annual inspection after the effective date of this AD, whichever occurs first. If there is any separation or a crinkling sound, remove the hose from service before further flight.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 10 hours TIS after the effective date of this AD, or within 100 hours TIS or at each annual inspection after the effective date of this AD, whichever occurs first.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Robinson Model R44 II helicopters with S/Ns 14168 through 14314 inclusive (except S/Ns 14269, 14287, 14299, and 14304), or with an orange silicone hose P/N A785-31 installed after October 1, 2017, and before the effective date of this AD.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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