ASN Wikibase Occurrence # 56876
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| Date: | Monday 5 January 2009 |
| Time: | 10:45 |
| Type: |  Eurocopter AS 350BA |
| Owner/operator: | Makani Kai Helicopters |
| Registration: | N141MK |
| MSN: | 2424 |
| Year of manufacture: | 1990 |
| Total airframe hrs: | 14290 hours |
| Engine model: | Honeywell LTS101-600A-3 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Wiliwili Nui Ridge, Oahu, HI -
 United States of America
|
| Phase: | Landing |
| Nature: | Passenger |
| Departure airport: | Honolulu-Daniel K. Inouye International Airport, HI (HNL/PHNL) |
| Honolulu, HI | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The purpose of the flight was to transport a worker to an antenna located on a ridge top at an elevation of about 2,400 feet. The pilot reported that the flight to the location was uneventful and that he completed his prelanding checklist and noted nothing abnormal. Just prior to landing, there was a loss of engine power. According to the pilot, “the engine felt and sounded like it was winding down and rotor RPM was starting to bleed off.” At this point the helicopter was less than 10 feet from the landing site and was not holding altitude. The pilot maneuvered the helicopter so that it touched down and rolled over onto its right side, which prevented the helicopter from falling down the steep slope of the ridge. After the helicopter came to rest, the pilot shut down the engine. Examination of the helicopter revealed no discrepancies with the fuel system. Engine continuity was established. A pneumatic leak check was performed and leaks were identified at the temperature compensator and at the PX acceleration bellows. A test cell run of the engine was completed without tightening any of the pneumatic fittings. During the test cell run, the engine achieved maximum continuous, takeoff, and thermodynamic shaft horsepower. The engine did not surge during transient deceleration and acceleration runs, and was responsive to commanded throttle inputs. No preexisting condition was identified on the engine that would have interfered with normal operation or explain the reported loss of engine power.
Probable Cause: The partial loss of engine power during landing for an undetermined reason.
Accident investigation:
 |
|
Sources:
NTSB
FAA register: 2. http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?omni=Home-N-Number&nNumberTxt=141MK
History of this aircraft
Other occurrences involving this aircraft
| 7 July 2002 | N141MK | Schuman Aviation Company Ltd | 0 | near Honolulu, Oahu, HI | |
sub |
Location
Images:
(c) NTSB
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 06-Jan-2009 10:07 | harro | Updated |
| 23-Jun-2009 11:53 | harro | Updated |
| 21-Jul-2014 01:11 | Dr. John Smith | Updated [Time, Location, Nature, Departure airport, Source, Narrative] |
| 21-Dec-2016 19:25 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 01-Dec-2017 11:39 | ASN Update Bot | Updated [Other fatalities, Departure airport, Destination airport, Source, Narrative] |
| 15-Jun-2023 04:23 | Ron Averes | Updated [[Other fatalities, Departure airport, Destination airport, Source, Narrative]] |
Corrections or additions? ... Edit this accident description
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