Airworthiness Directive · Amendment 39-12886 · Eurocopter France Model EC 155B Helicopters
Eurocopter France Model EC 155B Helicopters
Model EC 155B helicopters, with SMD45H multi- functional displays, part numbers C19209VF11, C19209VG11, C19267EF10, C19267EG10, C19267VF11, or C19267VG11, having serial numbers from 201 through 284 inclusive, which are not followed by the letter "M", installed, certificated in any category.
This amendment adopts a new airworthiness directive (AD) for Eurocopter France (Eurocopter) Model EC 155B helicopters with certain SMD45H multi-functional displays. This action requires replacing the "AC" SMD45H multi-functional display interconnection board (interconnection board) of the affected displays with a "BC" interconnection board. This amendment is prompted by an incident of smoke in a cockpit caused by overheating of the interconnection board. The actions specified in this AD are intended to prevent an electrical discontinuity in the grounding plane inside the SMD45H multi-functional display, which can result in overheating of the interconnection board, smoke in the cockpit, and subsequent loss of control of the helicopter.
