SEA08LA142 · Cessna 172M
Cessna 172M · Accident: windshear or thunderstorm during landing
From Zamperini Field (TOA) to Big Bear City Airport (L35)
Event
- NTSB case
- SEA08LA142
- 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
- Unknown
- 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 172M
- Aircraft type
- Cessna 172
- 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
- N21134
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From Zamperini Field (TOA), Torrance, CATo Big Bear City Airport (L35), Big Bear City, CA
- 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
- Defining eventThe 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
- Windshear or thunderstorm
- Also codedOther events the NTSB coded in the sequence, such as a wire strike after a loss of power. Flight Findings uses them for its kinds of event. Glossary
- Wire
- 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
- Aircraft › Aircraft oper/perf/capability
Approximate · Coordinates from the NTSB case API, which marks them as estimated or does not say; no uncertainty radius is established.
NTSB narrative
The pilot was on approach to runway 26 about 80 feet over the runway, when she believed she experienced a severe windshear, which caused the airplane to veer to the left. The pilot raised the flaps, added full power, and initiated a go-around, but was initially unable to get the airplane to climb. A pilot witness reported observing the airplane about 50 feet over the runway, slowing but not descending, and thought it was going to stall. The witness stated that the airplane slowed even more, then banked left and right at up to a 45-degree angle of bank. The witness saw the airplane's wings continue to oscillate in roll, then it banked sharply to the left as the nose achieved a steep nose up attitude, while remaining at 40 to 50 feet above the ground. The airplane then impacted a set of power lines. Wind gusts at the time of the accident were reported at 12 knots. There were no anomalies reported with the airplane prior to the flight. The density altitude at the mountain airport was calculated to be about 7,700 feet.
Probable cause
The pilot's failure to maintain adequate airspeed while on approach to landing that resulted in a stall/mush. Contributing to the accident was the wind shear and the high density altitude condition.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record SEA08LA142
- Event ID
- 20080604X00791
- Case number
- SEA08LA142
- Dataset
- full-current
- Source SHA-256
- 5cf380f0061817c0331a6b2d8cc7e0ee3a79bea469a1001dc5c10e56f35f5ab3
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, coordinates. 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: a2969a33c70f288693d876864e078404c8180d5cdfe8e1902f6391bba93b621b; retrieved 2026-09-15T09:43:48.758Z.