Sometime after leaving Westchester County Airport, the pilots of N520S experienced three generator tripping situations: 37 times on the trip out of Wilmington; three times on the trip back from Toronto; and (believed to be) ten times during the flight from Ontario back to Westchester County Airport. The latter tripping may have occurred during the in-flight recharge cycle (causing the generator to trip). The mechanic at Westchester County Airport who attended to the generator tripping problems was unaware of this latter occurrence. The tripping itself was considered to be a nuisance. Although the individual incidents of generator tripping were of short duration, the cumulative effect of the generator trips was considerable. Some generators tripped for over two months, while others tripped only for a few hours.
On the last flight of this ill-fated aircraft, Gregory pushed the button that initiated the recharge cycle before the aircraft was on the ground in Westchester County Airport. As might be expected, within a short period the number two generator tripped, and after several attempts to reset the generator, the third and fourth generators also tripped.
The record discloses that the cause of the initial generator tripping during the flight from Wilmington to Toronto was not known. The tripping of the generator when the aircraft returned from Toronto was attributed to some ground fault condition in connection with the recharge cycle. The passengers were informed that the aircraft was grounded for an emergency refueling. The ground fault tripping was never explained to Captain Gregory or the passengers before the flight home. After the customs inspectors at Westchester County Airport contacted Buccieri and stated that the aircraft had returned with a bad load, Buccieri called back to the TGA hangar and was informed by Jeffrey R. Beatley, a Phoenix Aerospace employee, that a problem existed on the aircraft. As it was the passenger's fault for pushing the button to initiate the recharge cycle before the aircraft was on the ground, Buccieri may have contemplated legal action. 7211a4ac4a