# NTSB Accident LAX99LA190
> **Beech B90** · 1999-05-23 · MOKULEIA, HI, USA · FATL
## Event
- **NTSB number:** LAX99LA190
- **Event ID:** 20001212X18819
- **Type:** Accident
- **Date:** 1999-05-23
- **Location:** MOKULEIA, HI, USA
- **Coordinates:** 21.569091, -158.119247
## Injuries
- **Highest injury:** FATL
- **Fatal:** 1
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 0
- **Total aboard:** 1
## Aircraft
- **Make:** Beech
- **Model:** B90
- **Registration:** N301DK
- **FAR Part:** 091
- **Engines:** 2
- **Damage:** DEST
## Conditions
- **Light:** DUSK
- **Weather:** VMC
## Probable cause

The pilot's incapacitation due to the effects of hypoxia from repeated flights to altitudes above 18,000 feet msl without supplemental oxygen.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=LAX99LA190) · AI Analytics · CC0 1.0*