# NTSB Incident ANC02IA093
> **Piper PA-31-350** · 2002-06-18 · TALKEETNA, AK, USA · SERS
## Event
- **NTSB number:** ANC02IA093
- **Event ID:** 20020829X01491
- **Type:** Incident
- **Date:** 2002-06-18
- **Location:** TALKEETNA, AK, USA
- **Coordinates:** 62.333332, -150.083328
## Injuries
- **Highest injury:** SERS
- **Fatal:** 0
- **Serious:** 1
- **Minor:** 0
- **Uninjured:** 8
- **Total aboard:** 9
## Aircraft
- **Make:** Piper
- **Model:** PA-31-350
- **Registration:** N828KT
- **FAR Part:** 135
- **Engines:** 2
- **Damage:** —
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The passenger's incapacitation during a high altitude flight due to a loss of consciousness as the result of a pre-existing cardiovascular condition.  A contributing factor in the incident was the operator's improper use of disposable oxygen masks without a reservoir bag above the recommended upper altitude limit for use of this type mask.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=ANC02IA093) · AI Analytics · CC0 1.0*