# NTSB Accident SEA92LA005
> **HUGHES 269B** · 1991-10-12 · HILLSBORO, OR, USA · NONE
## Event
- **NTSB number:** SEA92LA005
- **Event ID:** 20001212X18390
- **Type:** Accident
- **Date:** 1991-10-12
- **Location:** HILLSBORO, OR, USA
- **Coordinates:** 45.440471, -122.960319
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 2
- **Total aboard:** 2
## Aircraft
- **Make:** HUGHES
- **Model:** 269B
- **Registration:** N9474F
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

THE FAILURE TO MAINTAIN ROTOR RPM.  FACTORS INCLUDE INADEQUATE PREFLIGHT PLANNING, OVERCONFIDENCE IN AIRCRAFT'S ABILITY, AND NON-SUITABLE TERRAIN.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=SEA92LA005) · AI Analytics · CC0 1.0*