# NTSB Incident DEN04IA063
> **Canadair CL-600-2B19** · 2004-04-17 · Colorado Spring, CO, USA · NONE
## Event
- **NTSB number:** DEN04IA063
- **Event ID:** 20040419X00477
- **Type:** Incident
- **Date:** 2004-04-17
- **Location:** Colorado Spring, CO, USA
- **Coordinates:** 38.805831, -104.700279
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 53
- **Total aboard:** 53
## Aircraft
- **Make:** Canadair
- **Model:** CL-600-2B19
- **Registration:** N17231
- **FAR Part:** 121
- **Engines:** 2
- **Damage:** MINR
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The failed air conditioning fan by-pass check valve and the subsequent overtemperature of the air conditioning pack.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=DEN04IA063) · AI Analytics · CC0 1.0*