WPR10CA230 · Cessna 172S
Opensky Airways Cessna 172S · Accident: loss of control on ground during takeoff
From Palo Alto Airport (KPAO) to Buchanan Field (KCCR)
Event
- NTSB case
- WPR10CA230
- 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 172S
- 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
- N796SP
- Operator
- Opensky Airways
- Onboard fatalities
- Unknown
- Route
- From Palo Alto Airport (KPAO), Palo Alto, CATo Buchanan Field (KCCR), Concord, 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
- Takeoff
- 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
- Loss of control on ground
- 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
- Pole
- 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
- Personnel issues › Action/decision
- Personnel issues › Task performance
Approximate · Coordinates from the NTSB case API, not marked as estimated; no uncertainty radius is established.
NTSB narrative
The certified flight instructor (CFI) reported that the student pilot, who was seated in the left seat, was performing a short field takeoff. The CFI said that during the takeoff, the airplane yawed left dramatically and became airborne in a nose-high attitude. The CFI reported that she took control and "pushed" forward on the yoke and regained control of the airplane; however, in the process, the airplane collided with an anemometer pole. The CFI reported that she was able to continue the flight, entered a non-standard pattern for the runway and landed without further incident. The airplane sustained substantial damage to the horizontal stabilizer; damage was also noted to the right wing. No pre accident mechanical deficiencies or anomalies with the airplane were reported.
Probable cause
The student pilot's failure to maintain directional control and the certified flight instructor’s delayed response to the student pilot's loss of control during the takeoff roll.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record WPR10CA230
- Event ID
- 20100507X44126
- Case number
- WPR10CA230
- 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: d8058260eec50cea6977ff45c7a4e59ad1bfe6a1db8dbe74fd9e4baf07d239e6; retrieved 2026-09-15T14:00:54.524Z.