Controlled Flight Into Terrain · NTSB CEN10FA299

BEECH G35 — Marble, CO

1 fatal Low altitude
DateJune 6, 2010
LocationMarble, CO
AircraftBEECH G35
Purpose of flightPersonal
ConditionsDay · Visual Meteorological Cond
Phase / occurrenceManeuvering Controlled flight into terr/obj (CFIT)
Pilot age38
Pilot total time521 hrs · Building experience
Time in type23 hrs
Fatalities1, 1 serious

Probable cause

The pilot’s miscalculation of the airplane's turn radius and climb capabilities at high altitude, resulting in controlled flight into terrain. Contributing to the accident was the pilot's lack of mountain flying experience and restricted visibility due to the rising sun.

NTSB findings

  • Environmental issues-Physical environment-(general)-(general)-Effect on operation
  • Personnel issues-Experience/knowledge-Experience/qualifications-(general)-Pilot - F
  • Environmental issues-Conditions/weather/phenomena-Temp/humidity/pressure-High density altitude-Effect on operation - C
  • Environmental issues-Conditions/weather/phenomena-Light condition-Bright light-Effect on personnel - F

What happened

The private pilot was attempting to land to the east on a private airstrip in mountainous terrain. The surviving passengers reported that the sun had just crested the mountains, obscuring their vision as they approached the vicinity of the airstrip. The pilot overflew the intended destination and informed the passengers that he would turn to land on the airstrip. The pilot misjudged his turn radius and the proximity of the mountains and turned into terrain. The passengers stated that the pilot attempted to maneuver away from the mountain but was unable. A postaccident examination of the airplane did not reveal any preimpact anomalies which would have precluded normal operation of the airplane. A review of the pilot's log book revealed that he had only operated in mountainous terrain when he flew into the airstrip a few days prior to the accident. Several medications, including hydrocodone, were detected during toxicology. The lack of hydrocodone in the blood sample suggests that the pilot had not ingested this medication within the previous 12 hours and was not impaired by its use. It is unclear what conditions the pilot was treating with medication and whether these conditions interfered with his ability to pilot the airplane.

An editorial "what led to it / how to avoid it" analysis for this accident is generated separately and will appear here.

View the official NTSB docket →