ASN Wikibase Occurrence # 299041
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| Date: | Thursday 4 May 2000 |
| Time: | 15:55 |
| Type: |  Aerospatiale AS-350B |
| Owner/operator: | Peace Helicopters Ltd |
| Registration: | C-GPTT |
| MSN: | 1317 |
| Year of manufacture: | 1989 |
| Fatalities: | Fatalities: 3 / Occupants: 6 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Blanding, UT -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Passenger - Non-Scheduled/charter/Air Taxi |
| Departure airport: | (LZ1), UT |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
On May 4, 2000, approximately 1555 mountain daylight time, an Aerospatiale AS-350B helicopter, Canadian registration CGPTT, was destroyed during impact with terrain while maneuvering near Blanding, Utah. The commercial pilot and two passengers were fatally injured, and the other three passengers were seriously injured. The helicopter was being operated by Peace Helicopters Ltd., Edmonton, Alberta, under Title 14 CFR Part 91. Visual meteorological conditions prevailed for the local flight that originated from landing zone 1 (LZ1) 10 minutes earlier. No flight plan had been filed.
The pilot was assigned to fly for a geophysical seismic team in rugged high desert conditions (elevation 5,366 feet). On his second day of flying, he was requested, by one of the team members, to "fly a little easier; less aggressively." On his third day of flying, he was assigned to pick up five team members and their equipment. Once airborne (density altitude was 8,908 feet), he had been briefed that he would receive GPS team distribution coordinates; instead, he was instructed to land and hold for a period of time. A witness observed the helicopter fly eastbound, and then make a 45 to 60 degree bank turn [180 degrees] back to the west. The witness then saw the helicopter turn southbound, lower its nose down almost vertically, and then reduce its nose low pitch to approximately 45 degrees as it disappeared from sight. Postaccident examination of the engine revealed that the manual throttle pointer on the fuel control was in the emergency position. The first and second stage turbine wheels were found with their blades 50 to 70 percent melted, indicating an engine that functioned for a time at a temperature level well above its limits.
Probable Cause: The pilot's loss of aircraft control due to abrupt flight maneuvering. Contributing factors were the high density altitude weather condition, the total loss of engine power due to the pilot manually introducing excessive fuel into the engine and over temping the turbine section, and the lack of suitable terrain for the ensuing autorotation.
Accident investigation:
 |
|
Sources:
NTSB DEN00FA084
Images:
Photo: NTSB
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 16-Oct-2022 01:47 | ASN Update Bot | Added |
| 12-Nov-2022 22:03 | Captain Adam | Updated [Time, Registration, Operator, Total fatalities, Other fatalities, Location, Phase, Nature, Departure airport, Narrative, Photo] |
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