Accident Air Tractor AT-401 N45116, Saturday 4 August 1990

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Date:	Saturday 4 August 1990
Time:	08:40 LT
Type:	Air Tractor AT-401
Owner/operator:	Macys Flying Service Inc.
Registration:	N45116
MSN:	401-0752
Year of manufacture:	1990
Total airframe hrs:	301 hours
Engine model:	P&W R1340 AN1
Fatalities:	Fatalities: 0 / Occupants: 1
Other fatalities:	0
Aircraft damage:	Substantial
Category:	Accident
Location:	Tule Lake, CA - United States of America
Phase:	Manoeuvring (airshow, firefighting, ag.ops.)
Nature:	Agricultural
Departure airport:
Destination airport:
Investigating agency:	NTSB
Confidence Rating:	Accident investigation report completed and information captured

Narrative:
THE ENGINE QUIT WHEN THE PILOT PULLED UP TO MAKE ANOTHER SPRAY RUN. THE PILOT LANDED IN A FIELD AND COLLIDED WITH A 12 INCH WATER LINE. THE LANDING GEAR COLLAPSED AND THE AIRCRAFT NOSED OVER. EXAMINATION FOUND THE RIGHT MAGNETO MISSING APPROXIMATELY 50 PERCENT OF THE TEETH FROM THE DISTRIBUTOR GEAR.

Probable Cause: AN ENGINE FAILURE DUE TO MECHANICAL FAILURE OF THE DISTRIBUTOR.

Accident investigation: