Piper PA28 N16366 accident near West Mifflin, Pennsylvania

Probable cause

The pilot's failure to follow checklist procedures for an engine fire during start.

NTSB analysis

The private pilot stated that he attempted to start the airplane's engine but that it would not start. On the fifth attempt, he followed the "starting engine when flooded" checklist. As the propeller was turning with the starter motor engaged, white smoke began to emanate from the engine cowling. He then turned off the master switch, exited the airplane, and opened the engine cowling. Flames suddenly emanated from the left side of the engine. The engine and compartment subsequently sustained substantial fire and heat damage. The pilot added that there were no preaccident mechanical malfunctions with the airplane; examination of the wreckage revealed that the primer control was not in and locked. Review of a pilot's operating manual for the airplane revealed that, if an engine fire occurs during start, the pilot should move the mixture control to idle, move the throttle control to full open, and continue to turn the engine with the starter motor in an attempt to pull the fire into the engine. If the pilot had followed this procedure, it is likely that the fire would have been extinguished and prevented further damage to the airplane.

Text from the NTSB. Open the NTSB docket for ERA16LA154 for the full record.