ASN Wikibase Occurrence # 37374
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Date: | Saturday 6 August 1994 |
Time: | 15:45 |
Type: | Rockwell Commander 112 |
Owner/operator: | Copper State Air Service |
Registration: | N1018J |
MSN: | 18 |
Total airframe hrs: | 2626 hours |
Fatalities: | Fatalities: 3 / Occupants: 3 |
Aircraft damage: | Destroyed |
Category: | Accident |
Location: | Mohave Valley, AZ -
United States of America
|
Phase: | En route |
Nature: | Training |
Departure airport: | Bullhead City, AZ (IFP) |
Destination airport: | Mesa, AZ (FFZ) |
Investigating agency: | NTSB |
Confidence Rating: | Accident investigation report completed and information captured |
Narrative:THE AIRPLANE LANDED HARD AND FLIPPED OVER IN A DESERT WASH AFTER A TOTAL LOSS OF POWER. EXAMINATION OF THE ENGINE REVEALED THE NUMBER 4 PISTON CONNECTING ROD FAILED AS A RESULT OF LACK OF LUBRICATION. FURTHER EXAMINATION OF THE ENGINE DISCLOSED THE ENGINE CRANKCASE HALVES WERE REPAIRED DURING THE LAST ENGINE OVERHAUL. THE CASE HALVES WERE WELDED IN THE NUMBER 3 MAIN BEARING (CENTER) AND NUMBER 4 MAIN BEARING (REAR) BOSSES. THE OIL SUPPLY HOLE THAT SUPPLIES OIL TO THE NUMBER 4 CONNECTING ROD WAS FOUND WELDED OVER AND NOT BORED AFTER THE REPAIR. THE ENGINE WAS OVERHAULED 1,420 HOURS BEFORE THE ACCIDENT. CAUSE: Failure of the certified flight instructor to properly judge the flare to avert a hard landing, and the failure of other maintenance personnel to properly repair the engine case halves during engine overhaul. A factor in the accident was the uneven relief of the desert terrain.
Sources:
NTSB:
https://www.ntsb.gov/ntsb/brief.asp?ev_id=20001206X02063_ Revision history:
Date/time | Contributor | Updates |
24-Oct-2008 10:30 |
ASN archive |
Added |
21-Dec-2016 19:23 |
ASN Update Bot |
Updated [Time, Damage, Category, Investigating agency] |
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