Cessna 140 accident near Chickaloon, Alaska, May 29, 2011
On May 29, 2011 at about 1:00 am local time, a Cessna 140, registered N89424, was substantially damaged in an accident during initial climb near Chickaloon, Alaska (Sheep Mountain airport). It was a personal flight under general aviation rules (Part 91). No one was hurt; 2 people were on board or involved. The weather was visual conditions (good weather).
The NTSB's probable cause their words, unchanged
The pilot's improper decision to take off downwind from unsuitable terrain.
Source: NTSB aviation accident database, copy made November 2, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- May 29, 2011 · about 1:00 am local time · cases in 2011
- Place
- Chickaloon, Alaska · Sheep Mountain · cases near this airport · map
- Type
- Accident
- Injuries
- No one was hurt; 2 people were on board or involved.
- Weather
- visual conditions (good weather)
- Aircraft
- Cessna 140 · all 140s on the register
- Registration
- N89424 · no longer on the register · serial 8456
- Damage
- Substantial damage
- Flight
- Personal flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
The pilot departed from a short, rough field. He said he elected to depart with a tailwind due to the slope of the takeoff area. About 100 feet above the ground, the airplane encountered a stronger tailwind, and stopped climbing. The pilot did not turn away from the rising terrain because he thought the airplane would stall. The airplane was unable to out-climb the rising terrain, and impacted trees. The airplane sustained substantial damage to the wings and fuselage. The pilot reported no preimpact mechanical malfunctions or failures with the airplane that would have precluded normal operation.
The complete narrative as the NTSB published it. The NTSB's docket holds the report as a PDF and any photographs, statements and other documents from the investigation.
The factual record from the NTSB's investigation tables, in plain English
What happened, in order
- Loss of control in flight during initial climb defining event
- Collision with terrain or object (not controlled flight into terrain) during initial climb
The NTSB's findings
- cause Aircraft › Aircraft oper/perf/capability › Aircraft capability › Climb capability › Capability exceeded
- cause Personnel issues › Action/decision › Info processing/decision › Decision making/judgment › Pilot
- Environmental issues › Physical environment › Runway/land/takeoff/taxi surfa › (general) › Contributed to outcome
- Environmental issues › Conditions/weather/phenomena › Wind › Tailwind › Contributed to outcome
Pilot
- Certificate: private
- Ratings: single-engine land
- Flight time: 363 hours in all; 15 in this make and model; 5 in the last 90 days; 3 in the last 30 days; 320 as pilot in command
- Medical certificate: Class 3 (without waivers/limitations)
- Seat: left
- Injury: no injuries
The aircraft
- Airframe total time: 4,027 hours
- Last inspection: annual inspection, September 1, 2009
- Maximum gross weight: 1,450 lb
- Seats: 2
- Landing gear: fixed
- Engine: Cont Motor C85 SERIES (piston); 0 hours total
The flight
- Departed from: PASP Chickaloon AK at 3:00 pm
- Destination: AK88 Sterling AK
- Flight plan: none
- Runway 05, 2,270 ft by 10 ft
Weather at the time
- Light: daylight
- Wind: at 10 knots, gusting 25
- Visibility: 20 statute miles
- Sky: clear
- Temperature: 72°F (22°C), dew point 0°F (-18°C)
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Flight crew | 1 | |||
| Passengers | 1 |
Documents from the investigation the NTSB's docket: the evidence folder behind the report
1 document, released by the NTSB on June 30, 2011. View them here, or download them; the NTSB redacts some personal details before release, and this site shows the NTSB's own titles rather than its file names.
| # | Document | What it is | |
|---|---|---|---|
| 1 | Pilot/operator Aircraft Accident Report, NTSB Form 6120.1 | PDF, 9 pages | View Download |
The same docket at the NTSB · documents without a copy here are fetched from the NTSB when you open them.
Connections how this case links to the rest of the register
- N89424: not on the register today · the record of its deregistration
- Cessna 140 1,839 registered today · the model family and its accident history
- Cessna 72,682 aircraft on the register
- Engine: Cont Motor C85 SERIES 4,672 aircraft carry this series today · as the NTSB recorded it
- Sheep Mountain Airport · nearest airport
- Eagle Nest Airport · bound for
- Accidents and incidents in Alaska 5,932 since 1982 · 825 in the last ten years
- Alaska 9,142 aircraft registered
The whole map of how records connect · these connections as data: /graph/accident/ANC11CA040.json.
The bigger picture in Aviation Analytics: accidents over time since 1982, by model, by phase of flight and conditions, by place and on the map.
Everything on this page comes from the NTSB's public records. The narrative, probable cause and findings are the NTSB's own words; the coded tables behind the report are written out in plain English, with pilots' ages, home towns and medical details left out. The documents and photographs are the NTSB's docket, shown as the NTSB released them. This site's own text does not name anyone involved, its policy at this time. A preliminary report can change; the final report usually follows one to two years later, and the page is refreshed when it does.