CEN25LA402 · Textron Aviation Inc 525C
Pacifia Textron Aviation Inc 525C · Accident: landing gear collapse
From Pensacola International Airport (PNS) to an unrecorded destination
Event
- NTSB case
- CEN25LA402
- 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
Textron Aviation Inc 525C
- Aircraft type
- Cessna 525
- 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
- N361MB
- Operator
- Pacifia
- Onboard fatalities
- Unknown
- Route
- From Pensacola International Airport (PNS), Pensacola, FLTo not recorded
- Aircraft age
- About 4 years (built 2021)
- 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
- Personnel issues › Task performance
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
About 10,000 ft mean sea level during a repositioning flight, the flight crew felt a bump/thud in the back of the airplane, which they thought was caused by something falling into the aisle from the lavatory. The flight crew observed that the landing gear unsafe light was illuminated. The flight crew stated that they followed emergency/abnormal airplane checklist items and reset the landing circuit breaker, which did not retract the landing gear. Then, the crew lowered the landing gear, which resulted in three green landing gear position lights. They continued the flight to the destination with the landing gear extended where they landed the airplane. During landing rollout and after applying moderate braking, they felt the right main landing gear collapse, which then punctured the right wing and resulted in substantial damage to right wing. Postaccident examination revealed the aft main landing gear trunnion pin for the right main landing gear was not properly installed during the recent maintenance as the aft trunnion pin was not installed far enough to allow the retaining roll pin to engage and retain the trunnion pin. The pilot reported and maintenance records showed that maintenance performed by the aircraft manufacturer’s service center, which included the reinstallation of the main landing gear trunnion pin, occurred 2.9 hours before the accident. According to the manufacturer’s maintenance manual installation procedures, maintenance personnel are required to make sure the aft end of the trunnion pin is at least 2.0 inches (50.8 mm) forward of the aft spar fitting to verify proper installation. The Civil Aviation Accident and Incident Investigation Commission (CIAIAC) of Spain investigated a similar accident that occurred on May 4, 2018, as documented in CIAIAC Report A-012/2018. As a result of the investigation, the aircraft manufacturer published a mandatory service letter (SL525C-32-12) to do an inspection of the aft main landing trunnion pins for proper installation.
Probable cause
The improper installation of the trunnion pin, which resulted in a failure of the right main landing gear. Contributing to the accident was the failure of maintenance personnel to follow the aircraft manufacturer’s maintenance procedures.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record CEN25LA402
- Event ID
- 20250929201748
- Case number
- CEN25LA402
- 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, 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: f172cd699ba7c31107197e76c3096d07494d380392f8be60998e30f7636cc4db; retrieved 2026-09-16T20:24:03.251Z.