# NTSB Accident CHI97LA178
> **Grumman-Schweizer G-164A** · 1997-06-20 · BENTON, MO, USA · NONE
## Event
- **NTSB number:** CHI97LA178
- **Event ID:** 20001208X08091
- **Type:** Accident
- **Date:** 1997-06-20
- **Location:** BENTON, MO, USA
- **Coordinates:** 37.089916, -89.559333
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 1
- **Total aboard:** 1
## Aircraft
- **Make:** Grumman-Schweizer
- **Model:** G-164A
- **Registration:** N48FS
- **FAR Part:** 137
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

the pilot's inadequate preflight by failing to insure that the secondary flight control lock was stowed properly, and subsequently the secondary flight control lock becoming engaged during the takeoff run.  A factor relating to the accident was: inadequate design of the secondary flight control lock that was installed by the airplane's owner/pilot.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=CHI97LA178) · AI Analytics · CC0 1.0*