# NTSB Accident ERA15LA311
> **THOMAS A SIMINSKI ZENITH CH 750** · 2015-08-14 · Allentown, PA, USA · SERS
## Event
- **NTSB number:** ERA15LA311
- **Event ID:** 20150814X40417
- **Type:** Accident
- **Date:** 2015-08-14
- **Location:** Allentown, PA, USA
- **Coordinates:** 40.570278, -75.488334
## Injuries
- **Highest injury:** SERS
- **Fatal:** 0
- **Serious:** 1
- **Minor:** 0
- **Uninjured:** 0
- **Total aboard:** 1
## Aircraft
- **Make:** THOMAS A SIMINSKI
- **Model:** ZENITH CH 750
- **Registration:** N1750Z
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

A partial loss of engine power due to the No. 1 spark plug being liberated from the cylinder head due to the stripped threads in the cylinder head. Contributing to the accident was the pilot’s decision to attempt to return to the airport while at a low altitude.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=ERA15LA311) · AI Analytics · CC0 1.0*