# NTSB Accident LAX93LA345
> **CESSNA 172G** · 1993-09-06 · AVALON, CA, USA · NONE
## Event
- **NTSB number:** LAX93LA345
- **Event ID:** 20001211X13422
- **Type:** Accident
- **Date:** 1993-09-06
- **Location:** AVALON, CA, USA
- **Coordinates:** 33.380161, -118.450988
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 3
- **Total aboard:** 3
## Aircraft
- **Make:** CESSNA
- **Model:** 172G
- **Registration:** N4143L
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** DEST
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

the oil starvation related failure of the number 1 and 2 connecting rods due to improper torque of the crankcase through bolts at the number 2 cylinder, which allowed fretting of the bearing surfaces and the resulting closure of the oil ports.  The under torque condition was due to improper installation procedures used by the aircraft owner, and, the inadequate inspection procedures utilized by the certifying repair station.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=LAX93LA345) · AI Analytics · CC0 1.0*