ANC97LA157 · Cessna 180
Cessna 180 · Accident: airframe, component or system failure during takeoff
From BEAR CREEK RIVR, AK to KEJULIK RIVER, AK
Event
- NTSB case
- ANC97LA157
- 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 180
- Aircraft type
- Cessna 180
- 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
- N4900A
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From BEAR CREEK RIVR, AKTo KEJULIK RIVER, 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
- 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
- Airframe, component or system failure
- 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
- Landing gear, main gear › Distorted
- Maintenance, major repair › Improper
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
The airplane departed a rough, rocky, gravel bar. During the subsequent landing roll at the pilot's gravel strip, the plane veered to the right. As the plane decelerated, full left rudder and brake input by the pilot did not maintain directional control. The airplane departed the right side of the strip, the left main landing gear separated, and the airplane nosed over. Inspection revealed that the right main landing gear was canted ten degrees to the right, and had been installed using 'Cherry Max' rivets instead of the required solid rivets.
Probable cause
The distorted/misaligned main landing gear, and an improper maintenance repair of the main landing gear. A factor associated with the accident was rough and uneven terrain.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record ANC97LA157
- Event ID
- 20001208X08777
- Case number
- ANC97LA157
- 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: local date, investigation status. Values present in the bulk record are kept.
- The date is the local date; the NTSB stores the UTC date 1997-09-30.
- API snapshot SHA-256: 6f6219832361ecfc773c5d2dd02859c8009f997c86324960853bd7c770f3c642; retrieved 2026-09-22T18:29:48.793Z.