ANC83LA063 · Cessna 170B
Cessna 170B · Accident: loss of control on ground/water during landing
From CHICKEN, AK to an unrecorded destination
Narrative check · The NTSB narrative appears to contradict this record's aircraft involved. Values are shown as recorded, not corrected; compare with the narrative.
Event
- NTSB case
- ANC83LA063
- 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 Possible conflict
- 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
- N1955C
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From CHICKEN, AKTo not recorded
- 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
- Landing · landing roll
- 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
- Loss of control on ground/water
- 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, ski assembly › Worn
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
THE PLT OF THE SKI EQUIPPED ACFT HAD TAKEN OFF FROM AN ABANDONDED STRIP THAT WAS IN A DETERIORATING CONDITION WITH ROCKS SCATTERED ALONG THE LANDING AREA. AFTER ARRIVING AT HIS DESTINATION, HE LANDED ON A WELL GRADED RWY WITH PACKED SNOW THAT WAS SUITABLE FOR EITHER WHEEL OR SKI OPERATION. AFTER TOUCHDOWN, THE ACFT BEGAN TO VEER TO THE LEFT. SUBSEQUENTLY, IT WENT OFF THE LEFT SIDE OF THE RWY & THE LEFT WING OF THE ACFT HIT THE LEFT WING OF A PIPER PA-12, N3140M. AFTER THAT, THE ACFT CONTINUED UNTIL IT STRUCK A SNOWBANK, THEN TRAVELED ABOUT 50 FT FURTHER BEFORE COMING TO REST. AN EXAM OF THE GEAR REVEALED THAT THE LEFT SKI WAS WORN. THE OVERLAYER WAS SCRAPED AWAY & APRX AN 18 INCH, OUTBOARD PORTION WAS BENT INWARD. THERE WAS EVIDENCE THAT THE SKI HAD HIT THE SNOWBANK WHILE THE LEFT WING WAS LOW CAUSING A TRANSVERSE FRACTURE & FAILURE OF THE LEFT AXLE (A NON-STANDARD C-185 AXLE). IMPROPER BOLTS HAD BEEN USED TO INSTALL THE NON-STANDARD AXLES & NO SHIMS HAD BEEN USED TO PROVIDE PROPER AXLE ALIGNMENT.
Verbatim NTSB analysis from the NTSB dataset
Sources
NTSB record ANC83LA063
- Event ID
- 20001214X42324
- Case number
- ANC83LA063
- 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: 95e74ce92be75b3778d73364d84eafac9d1ed9eeb9e963f850ca2f6a26070172; retrieved 2026-09-23T22:37:02.260Z.