ASN Wikibase Occurrence # 291882
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| Date: | Tuesday 22 August 2006 |
| Time: | 16:15 LT |
| Type: |  Lancair Propjet |
| Owner/operator: | |
| Registration: | N514PT |
| MSN: | LIV-498 |
| Total airframe hrs: | 188 hours |
| Engine model: | Walter 601E |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Helena, Montana -
 United States of America
|
| Phase: | Unknown |
| Nature: | Private |
| Departure airport: | Helena Airport, MT (HLN/KHLN) |
| Helena Airport, MT (HLN/KHLN) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
According to the pilot, after flying the turbine-powered amateur-built experimental airplane in the local area for about 40 minutes, he returned to the airport to practice some takeoffs and landings. After completing the first landing, he departed and was climbing out with the landing gear and flaps retracted when he "noticed flames coming out of the right side exhaust stack." The engine lost power, and the pilot executed a forced landing in a field. During the landing roll, the airplane impacted irrigation ditches and a fence. An FAA inspector examined the airplane and reported that the right wing spar was broken. He further reported observing dents in the exhaust stacks that appeared to be from turbine blade material breaking off the turbine wheels and exiting the engine. The inspector oversaw a read out of engine parameters stored in avionics equipment installed in the airplane. According to the inspector, the data revealed "over temp and over torque of the engine for in excess of 60 seconds." The pilot stated that the accident could have been prevented by having equipment installed in the airplane that would prevent turbine overtemperature by automatically limiting the fuel flow to the turbine.
Probable Cause: The total loss of engine power as a result of turbine over temperature due to the pilot's failure to follow proper procedures for engine operation. A contributing factor was the lack of suitable terrain for the ensuing forced landing.
Accident investigation:
 |
|
Sources:
NTSB SEA06LA167
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 08-Oct-2022 06:18 | ASN Update Bot | Added |
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