# NTSB Accident CEN21LA420
> **Quad City Ultralight Challenger II** · 2021-09-11 · Rogers City, MI, USA · MINR
## Event
- **NTSB number:** CEN21LA420
- **Event ID:** 20210915103862
- **Type:** Accident
- **Date:** 2021-09-11
- **Location:** Rogers City, MI, USA
- **Coordinates:** 45.407083, -83.812861
## Injuries
- **Highest injury:** MINR
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 1
- **Uninjured:** 0
- **Total aboard:** 1
## Aircraft
- **Make:** Quad City Ultralight
- **Model:** Challenger II
- **Registration:** N778H
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The separation of the right wing’s forward lift strut from the fuselage due to a missing nylon-insert lock nut. Contributing to the accident was the noncertificated pilot’s decision to operate the airplane even though a condition inspection had not been completed in the 13 years since the airplane received its experimental airworthiness certificate.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=CEN21LA420) · AI Analytics · CC0 1.0*