Accident Pitts S-1S N815DB, Monday 2 March 1987

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Date:	Monday 2 March 1987
Time:	17:50 LT
Type:	Pitts S-1S
Owner/operator:	Private
Registration:	N815DB
MSN:	70422
Total airframe hrs:	352 hours
Engine model:	Lycoming O-360-A4M
Fatalities:	Fatalities: 0 / Occupants: 1
Other fatalities:	0
Aircraft damage:	Substantial
Category:	Accident
Location:	Friendswood, TX - United States of America
Phase:	En route
Nature:	Private
Departure airport:	Friendswood, TX (T02
Destination airport:
Investigating agency:	NTSB
Confidence Rating:	Accident investigation report completed and information captured

Narrative:
THE PROP SEPARATED DURING FLT AND THE PLT WAS FORCED TO LAND THE ACFT ON ROUGH TERRAIN. INVESTIGATION REVEALED THAT THE PROP HAD SEPARATED AS A RESULT OF A PREVIOUSLY EXISTING CRACK IN THE ENG CRANKSHAFT. THE ENG HAD BEEN REBUILT FROM COMPONENTS SALVAGED FROM AN ENG INVOLVED IN A PREVIOUS WRECK AND INSTALLED BY A NON-CERTIFICATED MECHANIC.

Probable Cause:

Accident investigation: