Summary
This document proposes the adoption of a new airworthiness directive (AD) that is applicable to BHTC Model 407 helicopters. This proposal would require modifying the door latch assemblies on all four crew and passenger doors. This proposal is prompted by an incident that occurred during a manufacturer's flight test, in which a door latch assembly broke, preventing occupants in the helicopter from opening the door. The actions specified by the proposed AD are intended to prevent a door latch rod assembly from disengaging from the door handle and preventing helicopter occupants from opening the door.