# NTSB Accident ANC89LA171
> **HELIO H-250** · 1989-09-21 · NEAR ILIAMNA, AK, USA · MINR
## Event
- **NTSB number:** ANC89LA171
- **Event ID:** 20001213X29280
- **Type:** Accident
- **Date:** 1989-09-21
- **Location:** NEAR ILIAMNA, AK, USA
- **Coordinates:** 59.849758, -154.559692
## Injuries
- **Highest injury:** MINR
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 1
- **Uninjured:** 2
- **Total aboard:** 3
## Aircraft
- **Make:** HELIO
- **Model:** H-250
- **Registration:** N5450E
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** NDRK
- **Weather:** IMC
## Probable cause

INADEQUATE PREFLIGHT PLANNING/PREPARATION BY THE PILOT AND HIS CONTINUED FLIGHT INTO INSTRUMENT METEOROLOGICAL CONDITIONS (IMC).  FACTORS RELATED TO THE ACCIDENT WERE:  DARKNESS AND ADVERSE WEATHER CONDITIONS.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=ANC89LA171) · AI Analytics · CC0 1.0*