Ibex Corporation

Learjet 23

While in cruise flight on Airway J79-121 en route to Orlando, Florida, from Teterboro, New Jersey, the flightcrew of N100TA, an IBEX Corporation Gates Learjet 23, was cleared by the Jacksonville Air Route Traffic Control Center to descend from its altitude of Flight Level 410 to Flight Level 390. The flightcrew acknowledged the clearance, and air traffic control observed the radar target descend. About 2 minutes later, the airplane crashed into the Atlantic Ocean, from a steep, high-speed descent about 12 miles from Savannah, Georgia. The air traffic controller made several unsuccessful attempts to contact the airplane. The pilots had reported no difficulties in any of their radio transmissions. The pilot, copilot, and the two passengers on board were killed. Beyond 1158:49, the program showed a gradual increase in indicated airspeed from 271 to 400 KIAS. The average rate of descent was 15,375 fpm based on the radar data using pressure altitude (mode C).