ASN Wikibase Occurrence # 362318
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| Date: | Sunday 14 March 1993 |
| Time: | 22:00 LT |
| Type: |  Cessna 182 |
| Owner/operator: | M. Kent Christopherson |
| Registration: | N466KT |
| MSN: | 18255870 |
| Year of manufacture: | 1964 |
| Total airframe hrs: | 3451 hours |
| Engine model: | CONTINENTAL O-470-R |
| Fatalities: | Fatalities: 0 / Occupants: 5 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Lake Havasu, AZ -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Yuma, AZ (KYUM) |
| St. George, UT (KSGU) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
DURING FLIGHT AT 8000 FEET, THE ENGINE LOST POWER. THE PILOT TRIED TO MAKE A FORCED LANDING AT LAKE HAVASU AIRPORT, BUT WAS UNABLE TO REACH THE AIRPORT. HE SELECTED A ROADWAY ABOUT 2 1/2 MILES SOUTH OF THE AIRPORT. DURING THE FINAL APPROACH TO THE ROADWAY, THE AIRPLANE STRUCK A VEHICLE. A METALLURGICAL EXAMINATION REVEALED THAT THE NUMBER TWO CYLINDER'S INBOARD BOSS HAD BEEN WELDED. THE WELD REPAIR IS SPECIFICALLY PROHIBITED BY TELEDYNE CONTINENTAL MOTORS SPECIFICATION MHS 217. THIS UNAPPROVED WELD LED TO SIGNIFICANT SOFTENING OF THE INBOARD BOSS, AND A REDUCTION OF FATIGUE STRENGTH. THE AIRPLANE RECORDS REVEALED THAT THE CYLINDERS HAD BEEN PURCHASED AT A AUCTION, AND THE CYLINDER'S MAINTENANCE HISTORY IS UNKNOWN. THE AIRPLANE RECORDS DID NOT REFLECT THAT ANY WELDING REPAIRS WERE PERFORMED ON THE NUMBER TWO CYLINDER.
Probable Cause: THE IMPROPER WELDING OF THE INBOARD BOSS BY AN UNKNOWN PERSON RESULTING IN A FATIGUE FAILURE ON THE INBOARD BOSS. A FACTOR RELATED TO THE ACCIDENT WAS THE VEHICLE THAT WAS STRUCK DURING THE FORCED LANDING.
Accident investigation:
 |
|
Sources:
NTSB LAX93LA151
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 17-Mar-2024 20:05 | ASN Update Bot | Added |
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