# NTSB Accident LAX05LA146
> **Robinson Helicopter Company R22A** · 2005-04-24 · Kailua-Kona, HI, USA · NONE
## Event
- **NTSB number:** LAX05LA146
- **Event ID:** 20050503X00539
- **Type:** Accident
- **Date:** 2005-04-24
- **Location:** Kailua-Kona, HI, USA
- **Coordinates:** 19.719444, -156.058334
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 2
- **Total aboard:** 2
## Aircraft
- **Make:** Robinson Helicopter Company
- **Model:** R22A
- **Registration:** N8406J
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

a total loss of engine power due to the failure of the engine's #3 exhaust valve due to an excessive valve guide clearance.  Contributing to the accident was the failure of maintenance personnel to adequately check the valve guide clearance during the last valve guide inspection.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=LAX05LA146) · AI Analytics · CC0 1.0*