# NTSB Accident ERA11LA379
> **PIPER J3C-65** · 2011-07-05 · Egremont, MA, USA · MINR
## Event
- **NTSB number:** ERA11LA379
- **Event ID:** 20110706X71714
- **Type:** Accident
- **Date:** 2011-07-05
- **Location:** Egremont, MA, USA
- **Coordinates:** 42.185832, -73.402496
## Injuries
- **Highest injury:** MINR
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 1
- **Uninjured:** 1
- **Total aboard:** 2
## Aircraft
- **Make:** PIPER
- **Model:** J3C-65
- **Registration:** N98550
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

A partial loss of engine power due to the No. 4 intake and exhaust valves becoming lodged in the valve guides, which resulted from a lack of use, improper engine storage preparation, and improper return to service from indefinite storage.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=ERA11LA379) · AI Analytics · CC0 1.0*