# Incident 20060518008529I: Cessna 421B, San Martin, CA, May 18, 2006

- Type: FAA incident report (Accident/Incident Data System), as reported
- Date: May 18, 2006, 22:30 local time
- Place: San Martin, CA
- Airport: South County Airport Of Santa Cla
- Damage: Minor damage
- Phase of flight: Roll-Out (Fixed Wing)
- Operating rules: General operating rules (Part 91)
- Operator: L6UA
- Location: 37.0829° N, 121.5963° W: Placed by OpenAirDocs: center of San Martin, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=37.0829&lon=-121.5963&mi=10
- Aircraft: N421WL, a cancelled registration (https://openairdocs.org/deregistered/N421WL-2020-10-31) (OpenAirDocs)
- Registry model: Cessna 421B (registry code 2076014, https://openairdocs.org/model/cessna-421b) (OpenAirDocs)
- Registry engine: Continental GTSIO-520 series (registry code 17046, https://openairdocs.org/engine/continental-gtsio-520-series) (OpenAirDocs)
- Reported make and model: CESSNA 421B
- Reported engine: CONT GTSIO520H
- People aboard: 4
- Fatal injuries: 0
- Pilot flight hours: 1,700 total, 40 in this make and model, 44 in the last 90 days
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20060518008529I

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

(-23) THE CENTER TORQUE LINKAGE CONNECTING BOLT ASSY WAS NOT INSTALLED PROPERLY BY MAINTENANCE PERSONNEL WHICH RESULTED IN THE AIRCRAFT LEFT MAIN LANDING GEAR TWISTING AND ROTATING AT LEAST 90 DEGREES WHEN THE AIRCRAFT TOUCHED DOWN AND EVENTUALLY RESULTED IN THE GEAR SHEARING OFF AT THE TOP OF THE BARREL PISTON CAUSING THE AIRCRAFT TO SLIDE OFF THE RUNWAY. THE AIRCRAFT WAS SAID TO BE CRABBING TO THE RIGHT DUE TO A LIGHT CROSSWIND WHICH PUT A SIDE LOAD ON THE TIRE AT TOUCH DOWN. THE TWISTING FORCE APPEARS TO HAVE BEEN ENOUGH TO CAUSE THE CENTER TORQUE LINK TO SEPARATE OVER THE NUT END OF THE BOLT.

## Other reports on N421WL (1)

Matched to the same aircraft by N-number and date.

- [Accident 20190609017389A](https://openairdocs.org/incident/20190609017389A), Jun 9, 2019: Cessna 421B (N421WL), Moriarity, NM, Substantial damage. On June 9, 2019, at 1210 MDT, a Cessna 421B registered to [privacy data omitted] sustained a hard landing at Moriarity municipal airport, Moriarity, new…

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. For accidents, the NTSB's own investigation is the fuller record.

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