# NTSB Accident DEN90LA168
> **Gulfstream G-II** · 1990-07-28 · CHEYENNE, WY, USA · SERS
## Event
- **NTSB number:** DEN90LA168
- **Event ID:** 20001212X23685
- **Type:** Accident
- **Date:** 1990-07-28
- **Location:** CHEYENNE, WY, USA
- **Coordinates:** 41.409721, -104.099082
## Injuries
- **Highest injury:** SERS
- **Fatal:** 0
- **Serious:** 1
- **Minor:** 7
- **Uninjured:** 2
- **Total aboard:** 10
## Aircraft
- **Make:** Gulfstream
- **Model:** G-II
- **Registration:** N405MM
- **FAR Part:** 091
- **Engines:** 2
- **Damage:** —
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

AN UNFORESEEN ENCOUNTER WITH CLEAR AIR TURBULENCE.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=DEN90LA168) · AI Analytics · CC0 1.0*