LAX97LA125 · Cessna 425
Cessna 425 · Accident: airframe, component or system failure while standing
From Fresno Yosemite International Airport (FAT) 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
- LAX97LA125
- 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 425 Possible conflict
- Aircraft type
- Cessna 425
- 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
- N425TV
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From Fresno Yosemite International Airport (FAT)To 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
- Standing · engine(s) operating
- 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
- Airframe, component or system failure
- 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, normal brake system › Failure, partial
- Other maintenance personnel › Maintenance, installation, inadequate
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
Two pilots and a mechanic were going on a postmaintenance test flight to check the ailerons following control system work. The aircraft maintenance records disclosed that the right brake master cylinder was replaced prior to this flight. In addition, the original PT6-112 engines had been replaced by new PT6-135's with new 4-bladed propellers. The company which installed the engines and props said that the engines and props had not been rigged following installation due to the aircraft's scheduled arrival at the paint shop. The rigging was an open item yet to be accomplished at the time of the accident. The pilot said that prior to engine start, he tested and held brakes. Following engine start, the right brake pedal slowly went to the floor, and the aircraft began moving forward and turning left. He attempted to pump the right pedal to restore brake pressure, but without success. A loaded Cessna Citation was directly ahead of the aircraft, and the pilot intentionally kept the aircraft turning left to avoid the jet as he moved the throttle levers into reverse to stop. When the aircraft failed to stop, he pulled the propeller levers into feather and the condition levers to stop. The aircraft continued to move during this process, and the left wing collided with the parked Cessna 425. Examination of the aircraft by FAA airworthiness inspectors revealed that the engine and prop rigging was out of spec to the point that the propeller blades would not move beyond a zero blade angle. Taxi tests disclosed no anomaly with the brakes, and the engines and propellers as rigged would not provide any braking or reverse thrust. Detailed examination of the aircraft revealed no evidence of brake fluid leakage. The right brake master cylinder was removed from the airplane and tested to factory specifications for a new cylinder.
Probable cause
failure of the right brake to function, due to the installation mechanic's failure to completely bleed all air from the lines. A factor in the accident was the pilot's decision to fly the unairworthy aircraft before the engine/propeller installation had been fully rigged and tested to specification.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record LAX97LA125
- Event ID
- 20001208X07578
- Case number
- LAX97LA125
- 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: 7a2860df24dcd003f9acc436d3cb68f722d28d43cdc278723c6dfee980da93dd; retrieved 2026-09-22T20:12:40.527Z.