# NTSB Accident DEN93LA080
> **GLASFLUGEL STANDARD LIBELL** · 1993-07-16 · BOULDER, CO, USA · MINR
## Event
- **NTSB number:** DEN93LA080
- **Event ID:** 20001211X12893
- **Type:** Accident
- **Date:** 1993-07-16
- **Location:** BOULDER, CO, USA
- **Coordinates:** 40.019802, -105.24945
## Injuries
- **Highest injury:** MINR
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 1
- **Uninjured:** 0
- **Total aboard:** 1
## Aircraft
- **Make:** GLASFLUGEL
- **Model:** STANDARD LIBELL
- **Registration:** N4362
- **FAR Part:** 091
- **Engines:** 0
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

IMPROPER RIGGING OF THE SPOILER SYSTEM BY MAINTENANCE  PERSONNEL, WHICH CAUSED AN UNCOMMANDED SPOILER DEPLOYMENT AND PREVENTED SPOILER RETRACTION BY THE PILOT.  A FACTOR WAS UNSUITABLE TERRAIN FOR A FORCED LANDING

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=DEN93LA080) · MORVS · CC0 1.0*