Summary
This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain Dornier Model 328-100 series airplanes. This proposal would require modification of the electrical circuits for certain avionics by rewiring and adding electrical devices. This proposal is prompted by reports indicating that failure of an engine or direct current (DC) generator during takeoff and landing, coupled with an open DC tie, could cause the avionics to fail. The actions specified by the proposed AD are intended to prevent the failure of those avionics during takeoff and landing, which consequently could result in the inability of the flight crew to respond to and control the associated systems during these critical phases of flight.