Accident Boeing-Stearman A75N1 N62733, Friday 12 February 1993

You can contribute by submitting additional or updated information.

Date:	Friday 12 February 1993
Time:	15:28 LT
Type:	Boeing-Stearman A75N1
Owner/operator:	Grauf Flying Service, Inc.
Registration:	N62733
MSN:	75-4700
Year of manufacture:	1943
Total airframe hrs:	5345 hours
Engine model:	WRIGHT R-975-11
Fatalities:	Fatalities: 0 / Occupants: 1
Other fatalities:	0
Aircraft damage:	Substantial
Category:	Accident
Location:	Hughson, CA - United States of America
Phase:	En route
Nature:	Agricultural
Departure airport:
Destination airport:
Investigating agency:	NTSB
Confidence Rating:	Accident investigation report completed and information captured

Narrative:
SHORTLY AFTER DEPARTING A PRIVATELY OWNED AIRSTRIP THE AIRPLANE EXPERIENCED A ROUGH RUNNING ENGINE FOLLOWED BY A LOSS OF POWER. THE PILOT EXECUTED A LANDING IN A CULTIVATED OPEN FIELD. THE AIRPLANE NOSED OVER WHEN THE MAIN WHEELS DUG INTO THE SOFT TERRAIN. EXAMINATION OF THE ENGINE DISCLOSED THAT AN INTAKE VALVE FRACTURED.

Probable Cause: THE FAILURE OF THE INTAKE VALVE. THE SOFT TERRAIN CONTRIBUTED TO THIS ACCIDENT.

Accident investigation: