# NTSB Accident FTW91LA140
> **BEECH K35** · 1991-08-03 · LAREDO, TX, USA · MINR
## Event
- **NTSB number:** FTW91LA140
- **Event ID:** 20001212X17866
- **Type:** Accident
- **Date:** 1991-08-03
- **Location:** LAREDO, TX, USA
- **Coordinates:** 27.549638, -99.459037
## Injuries
- **Highest injury:** MINR
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 1
- **Uninjured:** 3
- **Total aboard:** 4
## Aircraft
- **Make:** BEECH
- **Model:** K35
- **Registration:** N8111R
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

THE IMPROPER INSTALLATION OF THE OIL FILTER ADAPTOR 'O' RING (SEAL) BY OTHER MAINTENANCE PERSONNEL WHO DISTORTED IT. A FACTOR WAS THE ROUGH, UNEVEN TERRAIN.

---
*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=FTW91LA140) · AI Analytics · CC0 1.0*