Hiller UH-12E accident near Marshall, WA
On November 10, 1998, a Hiller UH-12E (helicopter) was involved in an accident near Marshall, WA. 1 person died. Damage to the aircraft: destroyed.
- Date
- November 10, 1998
- Place
- Marshall, WA
- Aircraft
- Hiller UH-12E · Helicopter
- Injuries
- 1 fatal, 0 serious, 0 minor
- Damage
- Destroyed
- Position
- 47.431°N, 117.620°W
- NTSB ID
- 20001211X11496
NTSB summary
HISTORY OF FLIGHT On November 10, 1998, approximately 0900 Pacific standard time, a Hiller UH-12E, N752GB, operated by the pilot as a 14 CFR Part 91 repositioning flight, impacted the terrain during climb-out from a helicopter pad located at his residence near Cheney, Washington. Visual meteorological conditions prevailed at the time of the accident, and no flight plan was filed. The aircraft was destroyed, and the commercial pilot, who was the sole occupant, was fatally injured. The aircraft, which was en route to Keller, Washington, is believed to have been airborne for less than one minute prior to the impact. On the morning of the accident, the pilot was planning to fly to Keller, Washington, where he was to pick up Colville tribal biologist for a kokanee salmon count on the Sanpoil River. Around 0830 that morning, the pilot preflighted the helicopter on the landing pad at his residence/place of business. Around 0845, as the pilot's wife left the residence to go into town, she noticed that her husband was in the aircraft and the engine was running. She reported that at that time nothing sounded or looked abnormal. Although no one else reported seeing the helicopter after that, an individual who lived on adjacent property heard the pilot start the aircraft and perform what sounded to him like a pre-takeoff engine run. According to this witness, because of the close proximity of his property, he had heard and seen the pilot start the helicopter, perform a ground run-up, take off, and depart the area many times over the years. He said that because he had observed the opera
Probable cause
The loss of the bolt that connects the lateral cyclic linkage push rod to the lower end of the upper firewall-mounted lateral cyclic linkage bellcrank, resulting in an uncontrolled descent into the terrain.
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Browse: Washington · Hiller aircraft
Source: NTSB aviation accident database (US government, public domain). Findings may be preliminary or later revised by the NTSB. Not a complete global record.
