ANC96LA052 · Cessna 170B
Cessna 170B · Accident: on ground/water collision with object during takeoff
From an unrecorded airport to Chicken Airport (CKX)
Event
- NTSB case
- ANC96LA052
- Event typeAccident: someone killed or seriously injured, or the aircraft substantially damaged (NTSB definition). Incident: an occurrence that affected or could have affected safety, short of that. Glossary
- Accident
- InvestigationHow far the investigation had got when the record was published: preliminary, ongoing, final or completed. Unknown where the source does not say. Glossary
- Completed
- API-reported fatalities
- 0 · all aircraft and ground
- Ground fatalities
- 0
- OperationWhat kind of flying it was, grouped by the rules it flew under: airline (US Part 121), air taxi and commuter (Part 135), general aviation (Part 91 and similar), military or government. Glossary
- General aviation
- WeatherVisual meteorological conditions (VMC): good enough to fly by looking outside. Instrument conditions (IMC): cloud or low visibility, flying by instruments. Glossary
- Visual Meteorological Cond
Cessna 170B
- Aircraft type
- Cessna 170
- Category
- Airplane
- RegistrationThe aircraft's tail number, such as N12345 or G-ABCD. Registrations are reissued, so the same one years apart can be a different aircraft. Glossary
- N39781
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From not recordedTo Chicken Airport (CKX), AK
- Aircraft age
- Not recorded
- Flight rulesThe regulations the flight operated under: in the US, Part 91 (general aviation), Part 121 (airlines), Part 135 (air taxi and commuter) and others; for flights abroad, the NTSB's coarser commercial or non-commercial code. Glossary
- Part 91: General Aviation
- Phase of flightThe stage of the flight when things started to go wrong: standing, taxi, takeoff, initial climb, en route, maneuvering, approach or landing. Glossary
- Takeoff · roll/run
- First occurrenceThe single coded event the NTSB judges best describes what happened (records from 2008 on). Older records name the first occurrence in the sequence instead. Glossary
- On ground/water collision with object
- DamageDestroyed: beyond practical repair. Substantial: damage that affects the structure, performance or handling and normally needs major repair. Minor: less than that. Glossary
- Substantial
Cause areas
- Pilot in command › Clearance, not maintained
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
The certificated private pilot (first pilot), occupying the left seat, and a certificated airline transport pilot/flight instructor (second pilot), occupying the right seat, were departing a remote airstrip that was a 1,400 feet long area of compacted snow. The surface of the snow was soft and rough. By mutual agreement, the first pilot agreed to maintain directional control of the airplane during the takeoff roll. The second pilot agreed to manipulate the flaps to shorten the airplane's takeoff roll. During the takeoff roll, both pilots were focused in front of the airplane, and the left wing struck a tree, damaging the wing spar. The second pilot reported that the wind was from the east about 10 knots. The temperature was about 40 degrees F and the takeoff area sloped uphill about 1.5 degrees.
Probable cause
The first pilot's failure to maintain clearance with a tree. Factors in the accident were the first pilot's inadequate preflight planning and preparation and soft snow conditions.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record ANC96LA052
- Event ID
- 20001208X05500
- Case number
- ANC96LA052
- Dataset
- historical-pre2008
- Source SHA-256
- 89e2df6d848e7ab3b42e7d7c7a03ff403303057a26ca04c95b3ea67201c3ce74
Source notes (4)
- Unreviewed is an editorial label, not an investigation status. API-sourced is not report-checked or human-reviewed. Explicit event totals are used without summing aircraft injury tables; onboard allocation is withheld. Unknown values remain unknown. The operation category is mapped from the NTSB-reported FAR part and has not been reviewed.
- Filled from the NTSB case API where the bulk record had no value: investigation status. Values present in the bulk record are kept.
- The date is the local date, which is the same as the UTC date the NTSB stores.
- API snapshot SHA-256: 968e63fdd8cfb4110f0fe8129a77c51e8a06f3ed484f7130e1de5fa3db1be879; retrieved 2026-09-22T22:37:43.929Z.