ANC96LA062 · Cessna 170B
Cessna 170B · Accident: gear collapsed during landing
From Dillingham Airport (DLG) to an unrecorded destination
Event
- NTSB case
- ANC96LA062
- 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
- N2760D
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From Dillingham Airport (DLG), Dillingham, 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
- Gear collapsed
- 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 strut › Fatigue
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
The certificated private pilot was landing on a gravel area of beach next to a river. During the landing roll, the right main wheel assembly broke. The landing gear strut began dragging on the ground and the airplane nosed over. Examination of the gear strut revealed that it was broken along a horizontal plane, perpendicular to the outside vertical surface of the strut. A fracture had progressed through the upper mounting bolt holes that attach the axle and brake mounting plate to the strut. The surface of the fracture exhibited a dark brown/red appearance and ridges or stop marks radiating from the lower inside edge of the aft mounting bolt hole. These stop marks were similar in appearance to progressive beach marks, indicative of fatigue. The remaining fracture surface, at the inboard edge of the strut and between the bolt holes, exhibited a dull gray appearance and a shear lip oriented on about a 45 degree plane from the lower surface. The remaining fracture surface areas on both sides (forward and aft) of the bolt holes were also gray in appearance with small areas of red rust and corrosion.
Probable cause
fatigue failure of the right main landing gear strut.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record ANC96LA062
- Event ID
- 20001208X05509
- Case number
- ANC96LA062
- 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: 5a7465e99340ece7bb542e247a032bb7720972d0e85b721bfb676f55001a89be; retrieved 2026-09-21T21:52:55.379Z.