Raytheon Hawker 1000 (BAE 125-1000A), San Francisco, Sept. 11, 2004–The NTSB attributed the Hawker 1000 accident to an electrical arc from an undetermined source, which initiated a hydraulic line rupture, resulting in an equipment bay fire.
The Hawker 1000, registered to Raytheon and operated by NetJets, was holding short for takeoff from San Francisco International when the crew noticed a master caution and pack and auxiliary overheat warning light, followed by a rear baggage smoke detector warning light. The crew shut down the APU, declared an emergency and left the airplane. The fire crew found that the fire had gone out. There was structural damage to the aft pressure bulkhead, and a pinhole leak was found in a hydraulic line.
The pilot and the copilot were not injured.