Accident Piper PA-28R-200 N9306N, Monday 14 July 1986

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Date:	Monday 14 July 1986
Time:	08:21 LT
Type:	Piper PA-28R-200
Owner/operator:	Bookstein Aircraft Corporation
Registration:	N9306N
MSN:	28R-35006
Year of manufacture:	1969
Total airframe hrs:	3280 hours
Engine model:	Lycoming IO360-CIC
Fatalities:	Fatalities: 0 / Occupants: 2
Other fatalities:	0
Aircraft damage:	Substantial
Category:	Accident
Location:	Marathon, FL - United States of America
Phase:	En route
Nature:	Private
Departure airport:	Key West, FL (KEYW)
Destination airport:	Ft.lauderdale, FL (FXE
Investigating agency:	NTSB
Confidence Rating:	Accident investigation report completed and information captured

Narrative:
FLIGHT EXPERIENCED LOSS OF ENGINE OIL AND SUBSEQUENT SEIZING OF THE ENGINE AT WHICH TIME THE AIRCRAFT WAS DITCHED IN THE GULF OF MEXICO. POST CRASH EXAMINATION OF THE ENGINE REVEALED THE OIL LINE FROM THE PROPELLER GOVENOR TO THE ENGINE NOSE CASE HAD FAILED IN FATIGUE AT A BEND. TWO REQUIRED SUPPORT CLAMPS FOR THIS LINE WERE NOT INSTALLED. THE LINE HAD BEEN CHANGED 8 FLIGHT HOURS BEFORE THE FAILURE.

Probable Cause:

Accident investigation: