Airworthiness Directive · Amendment 39-11604 · MD Helicopters Inc. Model MD600N Helicopters
MD Helicopters Inc. Model MD600N Helicopters
Model MD600N helicopters, serial numbers with a prefix of “RN” 003 through 045, certificated in any category.
Note 1: This AD applies to each helicopter identified in the preceding applicability provision, regardless of whether it has been otherwise modified, altered, or repaired in the area subject to the requirements of this AD. For helicopters that have been modified, altered, or repaired so that the performance of the requirements of this AD is affected, the owner/operator must request approval for an alternative method of compliance in accordance with paragraph (b) of this AD. The request should include an assessment of the effect of the modification, alteration, or repair on the unsafe condition addressed by this AD; and, if the unsafe condition has not been eliminated, the request should include specific proposed actions to address it.
This amendment adopts a new airworthiness directive (AD), applicable to MD Helicopters Inc. (MDHI) Model MD600N helicopters, that requires inspecting each internal fuel hose connection to verify proper installation. This amendment is prompted by the discovery that certain fuel hose connections between the fuel cells and the engine can be incorrectly installed. The actions specified by this AD are intended to prevent fuel starvation of the engine while the fuel gage indicates fuel remaining in the tank, engine flameout, and a subsequent forced landing.
To prevent fuel starvation of the engine while the fuel gage indicates fuel remaining in the tank, engine flameout, and a subsequent forced landing, accomplish the following:
(a) Within 100 hours time-in-service, verify that the internal fuel hose connections have been properly installed in accordance with either Method A or Method B of the Accomplishment Instructions of MD Helicopters Service Bulletin SB 600N-025, dated July 2, 1999. Prior to further flight, make any necessary corrections.
