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NTSB Report
March 15, 2006 · Enstrom 280F · N811Z
Peetz, CO
Overview
Report Status
Final with probable cause
Event Type
Accident
Date
March 15, 2006
Injury Outcomes
No injuries (2 uninjured)
Location
Peetz, CO
Aircraft
Enstrom 280F
Tail Number
N811Z
Injuries
None
Aircraft Damage
Substantial
NTSB Number
DEN06CA048
While heading in a northwest direction at the edge of a box canyon, the helicopter encountered a "very strong burst down draft," and began to descend into the box canyon. The pilot attempted to arrest the descent, but was unsuccessful. Subsequently, the helicopter impacted the base of the canyon and came to rest upright.
NTSB Probable Cause
The pilot's failure to maintain aircraft control while maneuvering resulting in an impact with terrain. Contributing factors were the gusty winds, downdrafts, and box canyon.
Full Narrative
According to the pilot, the purpose of the flight was aerial photography of wildlife nesting areas. Prior to departure, the pilot checked the weather forecast, which called for calm winds and winds increasing in the afternoon. As the helicopter approached the target area, the winds were "dead calm", and the pilot was "watching for the first signs of wind in the grass on the tops of the cliff areas and in the canyons below." While heading in a northwest direction at the edge of a box canyon, the helicopter encountered a "very strong burst down draft," and began to descend into the box canyon. The pilot attempted to arrest the descent, but was unsuccessful. Subsequently, the helicopter impacted the base of the canyon and came to rest upright.
Flight
Event TypeAccident
Event Time11:00 MST
Nearest Airport0nm
Flight Plan FiledNone
Aircraft FireNo
Aircraft
AircraftEnstrom 280F
Tail NumberN811Z
Aircraft CategoryHeli
DamageSubstantial
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · HIO-360-F1AD · Reciprocating
People & Injuries
Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 57 · Second Class
Conditions
ConditionsVMC
LightDaylight
WindCalm
CeilingNone
Temperature / Dew Point0 C / 0 C
Altimeter0