Summary
This SNPRM revises an earlier proposed airworthiness directive (AD) for Eurocopter France (ECF) Model AS 332C, L, L1, and L2 helicopters that would have superseded an existing AD. That AD currently requires conducting a filter clogging warning test, and if necessary, replacing a blocked fuel filter element with an airworthy fuel filter element. The proposed AD would have required the same corrective actions as the existing AD and would have added another fuel filter part number to the applicability. That proposal was prompted by the discovery of blocked fuel filter by-pass valves. This SNPRM revises the proposed rule by: referencing a revision to the previously referenced service information; adding a fuel filter part number to the applicability; and clarifying other provisions throughout the AD. The actions specified by this SNPRM are intended to prevent power loss due to fuel starvation, engine flameouts, and a subsequent forced landing.