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ASN Wikibase Occurrence # 233447
Last updated: 2 March 2020
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Date:16-JUL-2007
Time:09:10
Type:Silhouette image of generic UH1 model; specific model in this crash may look slightly different
Bell UH-1H
Owner/operator:United States Forest Service
Registration: N667HP
C/n / msn: 65-09952
Fatalities:Fatalities: 0 / Occupants: 1
Other fatalities:0
Aircraft damage: Substantial
Category:Accident
Location:Benchmark, MT -   United States of America
Phase: Initial climb
Nature:Cargo
Departure airport:Benchmark, MT
Destination airport:
Investigating agency: NTSB
Narrative:
The purpose of the flight was to carry an external load in support of firefighting activity. The pilot departed from a nearby helibase with a visibility of 5 miles under moderate smoky conditions. While en route to another landing zone, the visibility deteriorated and the pilot reported difficulty seeing the landing zone. The pilot successfully landed at the landing zone without incident and set down a load of supplies. The ground crew then attached a load of firefighting equipment that was to be returned to the helibase. As the pilot transitioned to forward flight to depart from the landing zone, the visibility dropped, and he reportedly lost all visual reference. The helicopter settled into trees and impacted the ground, coming to rest on its right side. In the area of the landing zone at the time of the accident, the visibility was reported to be fluctuating between 1/4 to 1 mile due to smoke.





Probable Cause: Dense smoke/haze which restricted the pilot's visibility and the pilot's failure to maintain aircraft control during the emergency descent resulting in impact with terrain.

Sources:

NTSB: https://www.ntsb.gov/_layouts/ntsb.aviation/brief.aspx?ev_id=20070720X00969&key=1

Accident investigation:
cover
  
Investigating agency: NTSB
Status: Investigation completed
Duration: 12 years and 7 months
Download report: Final report


Revision history:

Date/timeContributorUpdates
02-Mar-2020 11:04 ASN Update Bot Added

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