From the FAA’s Accident/Incident Data System (AIDS), through its Aviation Safety Information Portal, as reported. The NTSB investigates accidents separately, and its record of an accident is the fuller one. The aircraft is matched to the registry by N-number and event date, checked against the reported make and model; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.
What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
Narrative: cylinder head separated. The cargo flight departed Indianapolis at 1008Z enroute to knoxville, Tennessee. The captain reported that the airplane had just leveled off at its assigned cruising altitude of 9,000' when the left engine began backfiring and the RPM surged to 3100. Fire was observed between the cylinders which continued for a few seconds and then went out. The propeller was feathered and the engine was secured. Fire extinguishers were not used. The captain declared an emergency and returned to Indianapolis, landing without incident at 1055Z. Inspection of the engine disclosed that the no. 1 cylinder head had separated from the cylinder.
As the FAA filed it
NARRATIVE: CYLINDER HEAD SEPARATED. THE CARGO FLIGHT DEPARTED INDIANAPOLIS AT 1008Z ENROUTE TO KNOXVILLE, TENNESSEE. THE CAPTAIN REPORTED THAT THE AIRPLANE HAD JUST LEVELED OFF AT ITS ASSIGNED CRUISING ALTITUDE OF 9,000' WHEN THE LEFT ENGINE BEGAN BACKFIRING AND THE RPM SURGED TO 3100. FIRE WAS OBSERVED BETWEEN THE CYLINDERS WHICH CONTINUED FOR A FEW SECONDS AND THEN WENT OUT. THE PROPELLER WAS FEATHERED AND THE ENGINE WAS SECURED. FIRE EXTINGUISHERS WERE NOT USED. THE CAPTAIN DECLARED AN EMERGENCY AND RETURNED TO INDIANAPOLIS, LANDING WITHOUT INCIDENT AT 1055Z. INSPECTION OF THE ENGINE DISCLOSED THAT THE NO. 1 CYLINDER HEAD HAD SEPARATED FROM THE CYLINDER.
Other reports on N139JR · 8
Matched to the same aircraft by N-number and date.