# NTSB Accident IAD96LA064
> **Piper PA-22-135** · 1996-04-19 · DOVER, DE, USA · SERS
## Event
- **NTSB number:** IAD96LA064
- **Event ID:** 20001208X05589
- **Type:** Accident
- **Date:** 1996-04-19
- **Location:** DOVER, DE, USA
- **Coordinates:** 39.149227, -75.510284
## Injuries
- **Highest injury:** SERS
- **Fatal:** 0
- **Serious:** 2
- **Minor:** 0
- **Uninjured:** 0
- **Total aboard:** 2
## Aircraft
- **Make:** Piper
- **Model:** PA-22-135
- **Registration:** N3506A
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DUSK
- **Weather:** VMC
## Probable cause

the overhaul maintenance personnel's improper major overhaul procedure (improper torque on the engine block center through bolts), which resulted in an in flight loss of engine power.  A related factor was the lack of suitable terrain available for a forced landing.

---
*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=IAD96LA064) · AI Analytics · CC0 1.0*