# NTSB Accident WPR09LA184
> **SIKORSKY CH-54B** · 2009-04-07 · Corvallis, OR, USA · NONE
## Event
- **NTSB number:** WPR09LA184
- **Event ID:** 20090408X53727
- **Type:** Accident
- **Date:** 2009-04-07
- **Location:** Corvallis, OR, USA
- **Coordinates:** 44.497222, -123.289443
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 2
- **Total aboard:** 2
## Aircraft
- **Make:** SIKORSKY
- **Model:** CH-54B
- **Registration:** N719HT
- **FAR Part:** 091
- **Engines:** 2
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The improper assembly of main rotor blade control components by the operator's maintenance personnel, which resulted in the main rotor blade's divergent path and their contact with the tail rotor drive shaft during ground operation following landing.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=WPR09LA184) · AI Analytics · CC0 1.0*