# NTSB Accident ERA13LA406
> **ENGINEERING & RESEARCH 415-D** · 2013-09-06 · Beaver Falls, PA, USA · NONE
## Event
- **NTSB number:** ERA13LA406
- **Event ID:** 20130909X51125
- **Type:** Accident
- **Date:** 2013-09-06
- **Location:** Beaver Falls, PA, USA
- **Coordinates:** 40.77, -80.391387
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 2
- **Total aboard:** 2
## Aircraft
- **Make:** ENGINEERING & RESEARCH
- **Model:** 415-D
- **Registration:** N3940H
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The owner/pilot’s failure to follow engine manufacturer recommendations for engine oil changes and spark plug cleaning and rotating when operating the airplane with 100 low lead fuel, which resulted in carbon buildup in the engine and the total loss of engine power due to the No. 3 cylinder exhaust valve being stuck open.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=ERA13LA406) · AI Analytics · CC0 1.0*