Accident Cessna 120 N1829N, Sunday 8 October 1989

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Date:	Sunday 8 October 1989
Time:	17:30 LT
Type:	Cessna 120
Owner/operator:	Private
Registration:	N1829N
MSN:	12073
Year of manufacture:	1948
Total airframe hrs:	1815 hours
Engine model:	Continental O-200
Fatalities:	Fatalities: 0 / Occupants: 1
Other fatalities:	0
Aircraft damage:	Substantial
Category:	Accident
Location:	Maysville, KY - United States of America
Phase:	En route
Nature:	Private
Departure airport:	Farrington, KY (KY29)
Destination airport:	Portsmouth, OH
Investigating agency:	NTSB
Confidence Rating:	Accident investigation report completed and information captured

Narrative:
ENGINE LOST POWER WHEN ALL OIL WAS LOST FROM ENGINE IN FLIGHT THROUGH HOLE IN ROCKER BOX COVER WHICH WAS RESULT OF 5 OF 6 SECURING SCREWS BEING MISSING AND COVER VIBRATING AGAINST ROCK ARM. AIRCRAFT COLLIDED WITH POWERLINES DURING SUBSEQUENT FORCED LANDING. PLT/OWNER STATED HE HAD INSPECTED ALL NUTS AND BOLTS 16 FLIGHT HOURS BEFORE ACCIDENT.

Probable Cause: THE IMPROPER INSPECTION OF THE AIRPLANES ENGINE BY THE PILOT/OWNER RESULTING IN FIVE ROCKER BOX COVER SCREWS BEING MISSING AND SUBSEQUENT LOSS OF ENGINE OIL DUE TO THE COVER VIBRATING AND CAUSING A HOLE TO BE WORN IN IT. SUBSEQUENT LOSS OF ENGINE POWER DUE TO LOSS OF ENGINE OIL RESULTED IN A FORCE LANDING AT WHICH TIME THE AIRPLANE COLLIDED WITH POWER LINES.

Accident investigation: