# NTSB Accident DEN89LA082
> **STINSON 108-2** · 1989-03-07 · CUSTER, SD, USA · SERS
## Event
- **NTSB number:** DEN89LA082
- **Event ID:** 20001213X27875
- **Type:** Accident
- **Date:** 1989-03-07
- **Location:** CUSTER, SD, USA
- **Coordinates:** 43.760253, -103.599998
## Injuries
- **Highest injury:** SERS
- **Fatal:** 0
- **Serious:** 1
- **Minor:** 0
- **Uninjured:** 0
- **Total aboard:** 1
## Aircraft
- **Make:** STINSON
- **Model:** 108-2
- **Registration:** N150C
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

THE IMPROPER MAINTENANCE BY THE PILOT IN COMMAND/OWNER IN THAT THE MAGNETO DRIVE GEAR RETAINING NUTS WERE NOT SAFETIED WHICH RESULTED IN THEM BACKING OFF, DISCONNECTING THE MAGNETOES AND ONE OF THE GEARS FALLING INTO THE ENGINE.

---
*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=DEN89LA082) · AI Analytics · CC0 1.0*