Accident Piper PA-23-250 N6505Y, Wednesday 26 December 1984

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Date:	Wednesday 26 December 1984
Time:	21:00 LT
Type:	Piper PA-23-250
Owner/operator:	Appalachian Aviation
Registration:	N6505Y
MSN:	27-3793
Year of manufacture:	1967
Total airframe hrs:	9890 hours
Engine model:	Lycoming IO-540-C4B5
Fatalities:	Fatalities: 0 / Occupants: 1
Other fatalities:	0
Aircraft damage:	Substantial
Category:	Accident
Location:	New Philadelphi, OH - United States of America
Phase:	En route
Nature:	Ferry/positioning
Departure airport:	Mcarthur, OH (22I)
Destination airport:	Erie, PA (KERI)
Investigating agency:	NTSB
Confidence Rating:	Accident investigation report completed and information captured

Narrative:
PLT FELT VIBRATION AND REDUCED POWER ON BOTH ENGINES TO IDLE. PLT HEARD A 'THUD' AND DISCOVERED THE LEFT PROPELLER HAD SEPARATED CUTTING THROUGH THE NOSE OF THE ACFT AS IT DEPARTED. THE PROPELLER WAS NOT LOCATED. TWO OF THE SIX PROPELLER BOLTS REMAINED WITH THE ACFT. METALLURGICAL EXAM OF THE TWO BOLTS REVEALED FATIGUE PROGRESSION STEMMING FROM NUMEROUS ORIGINS.

Probable Cause:

Accident investigation: