Top Flight Air Service

Shortly after leveling off at 14,000 feet the left engine quit. The pilot diverted to Tampa, and 34 minutes later the right engine quit. During the subsequent forced landing the airplane collided with the roof of a covered sidewalk and then trees. Teardown of the left engine revealed that the seal between the exhaust flange and turbocharger was not installed; bolt clamp was finger tight. Heat had melted wiring harness and magneto grounding leads insulation; both 'p' leads were grounded. Pilot stated that after losing the left engine he initiated a left tank to right engine crossfeed, and after 20 minutes of single engine flight in this configuration the right engine quit. Flight manual states to land as soon as possible in case of one engine failure. In addition, it warns that when flying on one engine and cross feeding fuel, absolute coordinated flight must be maintained to prevent unporting of the tank's fuel pickup tube when the tank is not full.

During arrival, the pilot was cleared for an ILS runway 07 approach. Also, he was advised of a DC-9 that was 4 miles ahead and was told to use caution for wake turbulence. As the aircraft was on final approach, it descended below the ILS glide slope and subsequently hit trees and crashed about 1.8 mile short of the runway. No preimpact part failure or malfunction of the aircraft or engines was found that would have resulted in an accident. Also, there were no reported problems with the ILS system and it tested normal after the accident. The pilot held a commercial pilot certificate which was good for single engine land aircraft; his multi-engine privileges were authorized as a private pilot, only. An NTSB performance study showed the aircraft was 2 minutes and 57 seconds behind the DC-9. Radar data indicated the aircraft did not exceed a bank angle of 32° and no excessive g-values were evident during the approach. The pilot, sole on board, was killed.