Pilot Debrief

CESSNA 172K near Gearhart, OR — 2008-08-04

Final reportLAX08FA256
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Date
2008-08-04
Location
Gearhart, OR, USA
Airport
K56S
Aircraft
CESSNA 172K
Registration
N828CC
Category
Airplane
Highest injury
Fatal
Fatalities
2
Phase of flight
Initial climb

Probable cause

The pilot's failure to maintain aircraft control during the initial climb after takeoff due to spatial disorientation.

NTSB narrative

The pilot took off in the morning without filing a flight plan for the planned cross-country flight. Weather in the vicinity of the airport was less than 3 miles visibility with overcast clouds at 300 feet above ground level. The overcast layer extended from 300 feet to 2,600 feet. Aircraft flight data was recovered from a handheld GPS unit that was onboard the airplane. The data disclosed that the airplane climbed to 412 feet mean sea level (msl) on a northerly heading, then entered a climbing left-hand turn that tightened into a climbing spiral. The airplane reached 1,350 feet msl before entering a rapid spiraling descent and colliding with a vacation home about 1 mile northwest of the airport. These GPS flight track data suggested that the pilot may have become spatially disoriented during the initial climb. A post impact fire destroyed the house and airplane. The pilot held an instrument airplane rating; however, a review of his personal flight records was unable to establish that he was current with his instrument flight experience. The majority of the airplane was destroyed by the post impact fire. In the small portions of wreckage that could be examined, no mechanical anomalies were identified. Post-accident toxicology testing detected a low level of zolpidem, a prescription sleep aid often known by the trade name Ambien, in the blood of the pilot. The source from which the blood sample was taken was not documented, however, and no conclusive determinations can be made regarding when the pilot may have last used the medication or whether he may have been impaired by its use. The medication would not typically be expected to result in impairment more than 6 hours after a dose, and the U.S. military permits flight duties as soon as 6 hours after the use of zolpidem.

Analysis

Primary failure mode
Spatial disorientation
First missed decision gate
Pilot could have aborted the flight due to poor visibility conditions.

NTSB coding

Evidence available

  • Photos
  • 18 docket documents
View NTSB final reportView NTSB docket

Docket documents18

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