Summary
We propose to adopt a new airworthiness directive (AD) for Eurocopter France Model EC155B and EC155B1 helicopters with a VIP 4- seat bench. This proposed AD is prompted by the determination that the load strength of the seat attachment hardware of the seat installation does not meet certification specifications. The proposed actions are intended to prevent overloading of the seat structure at the attachment point during a hard landing or emergency landing, which could result in the VIP 4-seat bench detaching from the floor and subsequent injury to the seat occupants.