# NTSB Accident LAX00GA102
> **Cessna T210M** · 2000-02-16 · ELFRIDA, AZ, USA · NONE
## Event
- **NTSB number:** LAX00GA102
- **Event ID:** 20001212X20506
- **Type:** Accident
- **Date:** 2000-02-16
- **Location:** ELFRIDA, AZ, USA
- **Coordinates:** 31.730333, -109.699203
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 2
- **Total aboard:** 2
## Aircraft
- **Make:** Cessna
- **Model:** T210M
- **Registration:** N761KC
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** NBRT
- **Weather:** VMC
## Probable cause

The company mechanic's failure to correctly install one or more of the crankshaft counterweight pin retaining plate snap rings, specifically ensuring that the snap rings were fully seated in their grooves.  This led to the complete separation of the No. 2 leading counterweight and the partial separation of the No. 3 trailing weight from the crankshaft and a resulting internal catastrophic engine failure.  A factor in the accident was the lack of definitive procedural guidance in any of the engine manufacturer's reference material, available at the time, on the correct installation of these components.

---
*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=LAX00GA102) · AI Analytics · CC0 1.0*