What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
Pilot/mechanic performed maintenance on engine's #5 cylinder valve seat. During course of maintenance removed and reinstalled oil plug. Did not torque plug to proper requirement or apply safety wire to plug. Aircraft departed airport and within 3 minutes of flight propeller oversped with subsequent engine failure. Landed aircraft in barren field. No damage to aircraft other than engine failure.
As the FAA filed it
PILOT/MECHANIC PERFORMED MAINTENANCE ON ENGINE'S #5 CYLINDER VALVE SEAT. DURING COURSE OF MAINTENANCE REMOVED AND REINSTALLED OIL PLUG. DID NOT TORQUE PLUG TO PROPER REQUIREMENT OR APPLY SAFETY WIRE TO PLUG. AIRCRAFT DEPARTED AIRPORT AND WITHIN 3 MINUTES OF FLIGHT PROPELLER OVERSPED WITH SUBSEQUENT ENGINE FAILURE. LANDED AIRCRAFT IN BARREN FIELD. NO DAMAGE TO AIRCRAFT OTHER THAN ENGINE FAILURE.
Other reports on N3938W · 1
Matched to the same aircraft by N-number and date.