Airworthiness Directive · Amendment 39-19673 · Engine air intake system
Robinson Helicopter Company Helicopters
Superseded. A later AD replaced this one: AD 2020-18-08. Comply with the one in force.
This AD applies to Robinson Helicopter Company Model R44 II helicopters certificated in any category.
The FAA is adopting a new airworthiness directive (AD) for Robinson Helicopter Company (Robinson) Model R44 II helicopters. This AD requires inspecting the engine air induction hose (hose) and replacing any hose that is not airworthy. This AD was prompted by multiple reports of separation between the outer and inner layers of the hoses. The FAA is issuing this AD to address the unsafe condition on these products.
(1) For helicopters with an engine air induction hose (hose) part number A785-31 installed after April 30, 2018 or helicopter serial numbers 14248 through 14268 and 14270 through 14286, within 10 hours time-in-service (TIS):
(i) 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, which is an indication of separation.
(ii) If there is any separation or a crinkling sound, replace the hose before further flight.
(iii) If there is no separation and no crinkling sound, replace the hose within 50 hours TIS.
(2) After the effective date of this AD, do not install on any helicopter a hose part number A785-31 marked with code 1Q18.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
Aircraft
