# NTSB Accident ANC04LA045
> **Arctic Aircraft Corp. S-1B2** · 2004-04-23 · Big Lake, AK, USA · SERS
## Event
- **NTSB number:** ANC04LA045
- **Event ID:** 20040428X00524
- **Type:** Accident
- **Date:** 2004-04-23
- **Location:** Big Lake, AK, USA
- **Coordinates:** 61.666667, -150.333328
## Injuries
- **Highest injury:** SERS
- **Fatal:** 0
- **Serious:** 1
- **Minor:** 1
- **Uninjured:** 0
- **Total aboard:** 2
## Aircraft
- **Make:** Arctic Aircraft Corp.
- **Model:** S-1B2
- **Registration:** N55AD
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The flight instructor's failure to insure that the carburetor heat was activated by the dual student following a simulated loss of engine power, which resulted in carburetor ice and the actual loss of engine power during a descent.  A factor associated with the accident is carburetor icing weather conditions.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=ANC04LA045) · AI Analytics · CC0 1.0*