AD Proposed for Bell 407 Instrument Panel Electrical Harness Chafing

The FAA has proposed to adopt a new airworthiness directive (AD) for certain Bell Textron Canada Limited Model 407 helicopters. This proposed AD was prompted by a determination that chafing can occur at various locations on the electrical harnesses located in the aircraft instrument panel area. This proposed AD would require a one-time detailed visual inspection of the electrical harnesses for chafing and corrective actions if necessary. This proposed AD would also require rotation of the backshell cast housing of connectors of the lower engine airframe unit and installation of a wire harness bracket and support, and for certain helicopters, installation of a wire bundle sleeve. 

You can view the Proposed AD here. Comments are due March 20, 2026.