FAA Publishes Hawker 400 Wiring AD

 - February 18, 2013, 2:00 PM

Newly issued airworthiness directive AD 2013-03-07 for the Hawker 400A was prompted by a report that the cockpit wiring for the 5-volt direct current (DC) system on the aircraft is undersized and does not have adequate circuit protection for the smaller gauge wire. The directive, which is effective as of March 19, requires installation of an in-line fuse in the 5-volt DC system for each of the five instrument lighting control power supplies. The work is designed to prevent failure of the wiring, which could result in smoke in the cockpit, loss of cockpit lighting and potential damage to surrounding wiring for other cockpit equipment such as the stick shaker function or angle-of-attack indicators.