EASA 2023-0214

Supersedes an AD requiring repetitive inspections of the rivets on the rear transmission upper and lower bearing support and the rivet heads of the rear bearing supports, and corrective actions if necessary. This AD adds a requirement for a modification to reinforce the rotor drive shaft and simplifies the inspection requirements. The AD stemmed from reports of degradation of the rear transmission shaft bearing support on an EC130 T2 helicopter, where it was determined that all attachment rivets of the transmission shaft bearing support were sheared. This condition could lead to failure of the tail rotor drive shaft and subsequent loss of yaw control of the helicopter. Since the original AD was issued, Airbus Helicopters developed the modification.