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ASN Wikibase Occurrence # 35114
Last updated: 17 October 2020
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Date:07-AUG-1994
Time:00:06
Type:Silhouette image of generic P28R model; specific model in this crash may look slightly different
Piper PA-28R-200
Owner/operator:Larry Wright
Registration: N6959J
C/n / msn: 28R-7635367
Fatalities:Fatalities: 4 / Occupants: 4
Other fatalities:0
Aircraft damage: Written off (damaged beyond repair)
Category:Accident
Location:San Luis Obispo, CA -   United States of America
Phase: Take off
Nature:Training
Departure airport:
Destination airport:Salt Lake City , UT (SLC)
Investigating agency: NTSB
Narrative:
A FEW MINUTES AFTER TAKEOFF, WITNESSES REPORTED SEEING THE AIRCRAFT IN THE NIGHT SKY FLYING BETWEEN 50 AND 100 FEET AGL, WESTBOUND, APPROXIMATELY 3 1/2 MILES FROM THE AIRPORT. THE AIRCRAFT WAS NEXT OBSERVED IN A LEFT DESCENDING TURN OVER THE FREEWAY WITH THE ENGINE MAKING LOUD AND UNUSUAL NOISES. THE AIRCRAFT SUBSEQUENTLY STRUCK A SECTION OF OVERHEAD HIGH-TENSION ELECTRICAL LINES THAT SPANNED THE FREEWAY. THE DRIVER OF A NORTHBOUND VEHICLE REPORTED THAT HIS VEHICLE COLLIDED WITH THE AIRCRAFT AS IT SLID ACROSS THE NORTHBOUND LANES OF TRAFFIC. THE AIRCRAFT CAME TO REST IN THE NORTHBOUND EMERGENCY LANE. AT THE TIME OF THE CRASH, THE ONLY OUTSIDE ILLUMINATION WAS FROM GROUND LIGHTS IN THE CITY. UPON INITIAL INSPECTION, IT WAS NOTED THAT THE ENGINE CASE WAS FRACTURED IN THE AREA OF THE NO. 4 CYLINDER. A FURTHER EXAMINATION OF THE INTERNAL COMPONENTS REVEALED THAT THE NO. 4 ROD AND END CAP HAD SEPARATED FROM THE CRANKSHAFT. METALLURGICAL EXAMINATION OF THE FAILED COMPONENTS TO DETERMINE THE FAILURE MODE WAS UNSUCCESSFUL DUE TO DAMAGE SUSTAINED ON THE FRACTURE FACES. CAUSE: the failure of the No. 4 cylinder connecting rod for undetermined reasons. The dark night lighting conditions, which hampered the ability of the pilots to detect the power lines, was a factor in this accident.

Sources:

NTSB: https://www.ntsb.gov/ntsb/brief.asp?ev_id=20001206X02062_


Revision history:

Date/timeContributorUpdates
24-Oct-2008 10:30 ASN archive Added

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