Accident Boeing A75N1 N74189, Wednesday 27 April 1983

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Date:	Wednesday 27 April 1983
Time:	18:30 LT
Type:	Boeing A75N1
Owner/operator:	Private
Registration:	N74189
MSN:	75717
Year of manufacture:	1941
Total airframe hrs:	3846 hours
Engine model:	P&W R-985-AN-3
Fatalities:	Fatalities: 0 / Occupants: 1
Other fatalities:	0
Aircraft damage:	Substantial
Category:	Accident
Location:	Kennesaw, GA - United States of America
Phase:	Manoeuvring (airshow, firefighting, ag.ops.)
Nature:	Private
Departure airport:	Kennesaw, GA (8A4)
Destination airport:
Investigating agency:	NTSB
Confidence Rating:	Accident investigation report completed and information captured

Narrative:
WHILE OVER A WOODED AREA AT 800 FT AGL THE ENG FAILED. THE PLT WAS UNABLE TO REACH A SUITABLE LANDING SITE BEFORE CONTACTING THE GROUND ON AN EMBANKMENT BELOW THE ELEVATION OF A NEARBY ROAD. THE ACFT STRUCK A TELEPHONE CABLE PRIOR TO TOUCHDOWN. THE #4 CONROD WAS FOUND BROKEN NEAR THE INBOARD END (ROUGH GRANULAR FRACTURE) & WAS BROKEN AT THE OUTBOARD END. THE PISTON WRIST PIN WAS DISINTEGRATED. THE PISTON PIN BOSS WAS BROKEN ON ONE END. CHUNKS & METAL SHAVINGS WERE FOUND THROUGHOUT THE ENG. THERE WAS NO EVIDENCE OF OIL STARVATION. THE ENG WAS LAST OVERHAULED IN 1973, 124 TACH HOURS PRIOR TO THE ACCIDENT, & ALL PISTONS WERE NEW. THE ACFT HAD OPERATED 4 HRS SINCE THE LAST ANNUAL ON 9/9/82 & ONLY 7 HRS SINCE THE PREVIOUS ANNUAL ON 7/81.

Probable Cause:

Accident investigation: