ASN Wikibase Occurrence # 353943
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| Date: | Friday 14 August 1998 |
| Time: | 11:26 LT |
| Type: |  Hiller UH-12E |
| Owner/operator: | Central States Helicopter |
| Registration: | N88782 |
| MSN: | 1734 |
| Year of manufacture: | 1965 |
| Total airframe hrs: | 6232 hours |
| Engine model: | Lycoming VO-540-C |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Shelton, NE -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Agricultural |
| Departure airport: | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The aircraft experienced a total loss of engine power while maneuvering during agricultural spraying. The aircraft impacted terrain during a forced landing. Examination of the engine by a Federal Aviation Administration Inspector showed the engine to rotate and to have compression in all cylinders. Electrical continuity was established from the magnetos and through the harness. There was no fuel found in the fuel line connecting the fuel tank to the engine driven pump. The engine driven and electric fuel pumps rotated and were then disassembled but damage was found on the impeller of the fuel pumps. The carburetor bowls contained 1/3 fuel. Approximately three gallons of fuel was drained from the helicopter fuel tank with no external leakage visually present. The fuel tank port is located at the forward end of the fuel tank. The Hiller UH-12E Flight Manual states, 'Operating with fuel indicator in the yellow arc during sideward or rearward flight may result in loss of power'. The yellow arc indicates a fuel range from 0 to 2.9 gallons, 0 to 11 liters, 0-17 lbs. of fuel. The Hiller UH-12E Flight Manual Supplement states, 'Consideration should be given to hoisting loads off the ground vertically as pulling or dragging loads off in other than a vertical direction can cause the helicopter to exceed the certified normal flight body-angle and unusable fuel envelope'.
Probable Cause: The pilot mismanaged the fuel which led to fuel starvation and subsequent loss of engine power.
Accident investigation:
 |
|
Sources:
NTSB CHI98LA312
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 10-Mar-2024 17:16 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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