WPR23LA012 · Cessna T210L
Cessna T210L · Accident: landing gear collapse
Event
- NTSB case
- WPR23LA012
- 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
- Event fatalities
- Unknown
- 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 T210L
- Aircraft type
- Cessna 210
- 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
- N2425S
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From not recordedTo not recorded
- Aircraft age
- About 46 years (built 1976)
- 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
- Landing gear collapse
- 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 systems
Approximate · Coordinates from the NTSB case API, which marks them as estimated or does not say; no uncertainty radius is established.
NTSB narrative
During a post-maintenance test flight after an engine overhaul and annual airframe inspection, the pilot retracted the landing gear as he departed the runway. While on the downwind leg of the airport traffic pattern the pilot lowered the landing gear handle, but the landing gear remained retracted and stowed and the associated green indicator light was not illuminated. The pilot attempted to troubleshoot the anomaly and eventually performed an emergency landing. The airplane touched down on the partially extended nose landing gear and fuselage, resulting in damage to the left horizontal stabilizer and elevator. Postaccident examination of the landing gear system revealed that the left main landing gear actuator retaining ring separated from the actuator cylinder, exposing the internal rod and O-rings. The separation exposed a hole in the cylinder and a loss of hydraulic fluid followed, leaving the system unpressurized. The lack of system pressure resulted in the failure of the nose landing gear door actuator assembly and the subsequent gear-up landing. The retaining ring inside the actuator cannot be visibly inspected due to the position of the seat being recessed into the cylinder. The actuator does not have a specified overhaul time or cycle limit.
Probable cause
A failure of a retaining ring in the airplane’s left main landing gear door actuator and the subsequent complete loss of hydraulic fluid, which resulted in a gear-up landing.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record WPR23LA012
- Event ID
- 20221013106125
- Case number
- WPR23LA012
- 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, cause areas. 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: 0a3e134c957927e54b6260b4f545307420e728e93a2b048c983bd24556211e12; retrieved 2026-09-16T16:16:47.909Z.