# NTSB Accident WPR21LA135
> **AVIAT AIRCRAFT INC A-1C-200** · 2021-02-19 · Carefree, AZ, USA · NONE
## Event
- **NTSB number:** WPR21LA135
- **Event ID:** 20210317102778
- **Type:** Accident
- **Date:** 2021-02-19
- **Location:** Carefree, AZ, USA
- **Coordinates:** 33.818095, -111.89792
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 2
- **Total aboard:** 2
## Aircraft
- **Make:** AVIAT AIRCRAFT INC
- **Model:** A-1C-200
- **Registration:** N43LL
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The substandard installation of the airplane’s autopilot system hardware, which resulted in a malfunction of the rudder control system during flight and a loss of directional control during the landing roll.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=WPR21LA135) · AI Analytics · CC0 1.0*