Accident Cessna A188B N21676, Monday 27 July 1998

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Date:	Monday 27 July 1998
Time:	09:00 LT
Type:	Cessna A188B
Owner/operator:	Private
Registration:	N21676
MSN:	18800951
Year of manufacture:	1972
Total airframe hrs:	2929 hours
Engine model:	Continental IO-520D
Fatalities:	Fatalities: 0 / Occupants: 1
Other fatalities:	0
Aircraft damage:	Substantial
Category:	Accident
Location:	Zolfo Springs, FL - United States of America
Phase:	Manoeuvring (airshow, firefighting, ag.ops.)
Nature:	Agricultural
Departure airport:	Wauchula, FL (FD06)
Destination airport:
Investigating agency:	NTSB
Confidence Rating:	Accident investigation report completed and information captured

Narrative:
The aerial application flight was pulling up from his second tract run of the day, at an altitude of 100 to 150 feet agl, when the engine made a 'clunk' sound and stopped running. The pilot felt his only option, given the low altitude, was a forced landing to a 'wide row' in the citrus grove. Subsequent examination of the engine revealed a crankshaft counterweight retaining pin had migrated from its installed position causing catastrophic internal failure.

Probable Cause: Total loss of engine power due to catastrophic internal engine failure caused by migration of a counterweight retaining.

Accident investigation: