CESSNA 182H near Stanley, ID — 2011-09-13
- Date
- 2011-09-13
- Location
- Stanley, ID, USA
- Aircraft
- CESSNA 182H
- Registration
- N2404X
- Category
- Airplane
- Highest injury
- Fatal
- Fatalities
- 2
- Phase of flight
- Descent
Probable cause
The pilot's failure to maintain airplane control due to spatial disorientation while executing a turn to reverse his course in dark night and low-visibility conditions. Contributing to the accident was the pilot's decision to initiate the flight into an area of known low visibility.
Contributing factors
Contributing to the accident was the pilot's decision to initiate the flight into an area of known low visibility.
NTSB narrative
On the afternoon of the accident, after receiving weather information about the route of flight, the pilot flew to his destination, with tentative plans to return later that night after dark. Because he knew there was a possibility of clouds and precipitation along the route, before making the decision to initiate the return flight, the pilot called two of his pilot-rated acquaintances to discuss the weather conditions, both of whom told the pilot that they thought he should stay at his location overnight and return home the next day after it was light. The pilot, who did not hold an instrument rating, told the acquaintances that he was going to go ahead and take off, but that he would return to his point of departure or another en route airport if he ran into any weather. About 45 minutes after departure, on what was reported as a dark night, the pilot encountered an area of precipitation; radar data indicates that he then initiated a left turn and reversed his course. Shortly after rolling out of that turn, the airplane entered a steep left turn and descended into the terrain, most likely due to the pilot’s spatial disorientation. Infrared satellite imagery revealed that the area around the accident site was under a solid cloud cover, and the cloud tops in the area around the time of the accident were about 21,000 feet. A postaccident examination of the airframe and engine revealed no evidence of mechanical malfunctions or failures that would have precluded normal operation.
Analysis
- Primary failure mode
- Controlled flight into terrain
- First missed decision gate
- Pilot should have stayed overnight in Salmon instead of attempting night flight.
NTSB coding
Evidence available
- ADS-B / radar
- Photos
- 25 docket documents
Docket documents25
- Release of Aircraft Wreckage, NTSB Form 6120.15form
- Release of Aircraft Wreckage, NTSB Form 6120.15 (Gyros)form
- Statement of Party Representatives to NTSB Investigationinterview
- Google Earth View of Accident Areaother
- Record of Conversation - Swansonother
- Record of Conversation - Witnessother
- Record of Conversation - Woodsother
- Engine Teardown Report (55 Embedded Images)photos
- IR Satellite Imagephotos
- Image 1. Photo showing where the airplane impacted the trees.photos
- Image 10. Close-up photo of a portion of the cambered face of propeller blade “A” showing the extent of the leading and trailing edge gouges.photos
- Image 11. Photo of the trailing edge of propeller blade “B” showing the extent of twisting and distortion.photos
- Image 12. Photo showing the fracture surface of the crankshaft.photos
- Image 2. Photo of primary impact point showing the high percentage of rocks in the terrain.photos
- Image 3. Photo of the remains of the engine.photos
- Image 4. Photo showing the numerous small pieces of the airplane scattered throughout the lightly forested terrain.photos
- Image 5. Photo showing additional small pieces of the airplane scattered among broken tree sections.photos
- Image 6. Photo of one of the larger sections of wing structure showing the extent to which it was torn, crushed, and distorted.photos
- Image 7. Photo of one of the larger sections of the fuselage structure showing the extent to which it was torn, crushed, and distorted.photos
- Image 8. Photo of the remains of the engine laid out for follow-up examination.photos
- Image 9. Photo of the cambered face of propeller blade “A”.photos
- Radar Track on Sectionalradar
- Weather Radar Boiseradar
- Weather Radar Pocatelloradar
- Toxicological Report (ADA County Coroner)report
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