On June 4, 2006, a Cessna 421B (registration N80MJ) was involved in an aviation accident near Jacksonville, FL. Investigators recorded the probable cause as: An undetermined event during takeoff/initial climb, which resulted in an emergency landing after takeoff and substantial damage to the airplane. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
A private pilot reported intense heat and suspected smoke during climb, declared an emergency, and performed a gear-up landing on dirt. FAA inspectors found no evidence of fire or heat damage.
Incident
A private pilot on a personal cross-country flight under 14 CFR Part 91 reported experiencing intense heat from the instrument panel and floorboard during the initial climb after takeoff. The pilot also thought he smelled smoke. He declared an emergency and returned to the airport. Multiple aural warning alarms sounded, and his communications radio became inoperative. Believing the airplane was on fire, the pilot landed in the dirt between the runway and taxiway with the landing gear retracted. During the landing, the airplane collided with the ground and a runway sign, resulting in damage to the wings.
Examination
An FAA operations inspector and an FAA maintenance inspector examined the airplane following the incident. They found no evidence of heat or smoke. The navigation instruments and communications radios appeared to operate normally during the inspection. The National Transportation Safety Board did not examine the airplane.
No probable cause was determined from the available information.