ASN Wikibase Occurrence # 361891
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| Date: | Monday 14 June 1993 |
| Time: | 13:53 LT |
| Type: |  Enstrom F-28C |
| Owner/operator: | Valley Helicopters |
| Registration: | N51717 |
| MSN: | 418 |
| Total airframe hrs: | 2460 hours |
| Engine model: | LYCOMING HIO-360 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Buckner, MO -
 United States of America
|
| Phase: | En route |
| Nature: | Survey |
| Departure airport: | Lexington, MO (4K3) |
| Oak Grove, MO | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
DURING AN AERIAL OBSERVATION FLIGHT TO INSPECT THE SIBLY-BLUE SPRINGS POWER LINE, THE PILOT AND PASSENGER REPORTED HEARING A 'CLUNK'/'POP' AND FELT A JOLT. THE PILOT STARTED AN IMMEDIATE AUTO ROTATION. WITH NO PLACE FOR A SAFE RUN ON LANDING, THE PILOT MADE A HARD EMERGENCY LANDING. THE HELICOPTER SLIDE NEXT TO A CORRUGATED METAL AND POLE SHED. UPON LANDING, THE PILOT NOTICED THAT A FIRE HAD STARTED IN THE ENGINE AREA. THE PILOT AND PASSENGER WERE ABLE TO EVACUATE THE AIRCRAFT BEFORE IT AND THE NEARBY POLE SHED WERE COMPLETELY ENGULFED IN FLAMES. THE ENGINE TEARDOWN SHOWED THE NO. 2 CYLINDER CONNECTING ROD WAS IMBEDDED IN THE SKIRT OF THE CYLINDER. A CONNECTING ROD NUT FOUND IN THE CRANKCASE WAS OVALIZED; HOWEVER, THE INTERNAL THREADS APPEARED TO BE FREE OF SUBSTANTIAL DAMAGE AND WERE NOT STRIPPED.
Probable Cause: THE NUT BACKING OFF THE CONNECTING ROD BOLT RESULTING IN ROD FAILURE. A FACTOR INVOLVED IN THIS ACCIDENT WAS THE LACK OF SUITABLE TERRAIN FOR THE PILOT IN COMMAND TO MAKE A RUN ON LANDING.
Accident investigation:
 |
|
Sources:
NTSB CHI93LA212
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 17-Mar-2024 15:32 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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