ASN Wikibase Occurrence # 77937
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Date: | Friday 24 September 2010 |
Time: | 12:45 LT |
Type: | Bell OH-58A Kiowa |
Owner/operator: | Cahaba Forestry Services |
Registration: | N132HD |
MSN: | 41930 |
Year of manufacture: | 1972 |
Total airframe hrs: | 9030 hours |
Engine model: | Rolls Royce T63-A-720 |
Fatalities: | Fatalities: 0 / Occupants: 1 |
Aircraft damage: | Substantial |
Category: | Accident |
Location: | Taylorsville, Mississippi -
United States of America
|
Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
Nature: | Agricultural |
Departure airport: | |
Destination airport: | |
Investigating agency: | NTSB |
Confidence Rating: | Accident investigation report completed and information captured |
Narrative:The helicopter pilot was surveying a field in preparation for aerial application. While he was maneuvering the helicopter about 100 feet above the ground, the engine lost all power without warning. The pilot noticed a space in between the trees and attempted to autorotate to that spot, but the helicopter impacted trees nearby. A postaccident examination of the wreckage revealed 16 gallons of fuel remained in the helicopter and no fuel contamination was observed.
A successful test-run of the engine was subsequently performed. Examination of the fuel boost pump revealed that the inlet shut-off valve arm was bent, which could restrict fuel flow. When power was applied to the pump, it pumped fuel from a bucket; however, it did not appear to pump the fuel at maximum capacity. Further testing was performed utilizing both the bent arm and a replacement stock arm. The test results were similar for both arms, which were both below the pump's flow requirements. The bent arm was re-installed and a third examination was conducted at the pump manufacturer's facility, which revealed that the pump's ring tong terminals and pump cartridge were the incorrect models for the fuel boost pump; however, during the third test, the pump passed flow tests as received, and flow improved when the inlet valve stem assembly and cartridge were replaced. The bent inlet shut-off valve arm and/or incorrect fuel boost pump assembly could have resulted in a total loss of engine power; however, the investigation could not determine what, if any, effect they had on the helicopter at the time of the accident.
Probable Cause and Findings
A total loss of engine power while maneuvering at low altitude for undetermined reasons.
Accident investigation:
|
| |
Investigating agency: | NTSB |
Report number: | ERA10LA499 |
Status: | Investigation completed |
Duration: | |
Download report: | Final report |
|
Sources:
http://www.msnewsnow.com/Global/story.asp?S=13214048 http://www.wdam.com/Global/story.asp?S=13214048
NTSB
History of this aircraft
Other occurrences involving this aircraft
27 July 2022 |
N132HD |
Triple F Flying Inc |
0 |
Bloomsburg, PA |
|
sub |
Location
Revision history:
Date/time | Contributor | Updates |
24-Sep-2010 23:33 |
slowkid |
Added |
12-Oct-2021 18:38 |
harro |
Updated [Time, Aircraft type, Registration, Cn, Operator, Source, Narrative, Accident report] |
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