# NTSB Accident ANC21LA064
> **PIPER PA-14** · 2021-07-23 · Anchorage, AK, USA · NONE
## Event
- **NTSB number:** ANC21LA064
- **Event ID:** 20210726103552
- **Type:** Accident
- **Date:** 2021-07-23
- **Location:** Anchorage, AK, USA
- **Coordinates:** 61.181371, -149.97211
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 1
- **Total aboard:** 1
## Aircraft
- **Make:** PIPER
- **Model:** PA-14
- **Registration:** N4206H
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The fatigue fracture of the American Iron and Steel Institute (AISI) 1025 carbon steel rudder post, which resulted in structural failure of the rudder. Contributing to the fatigue failure was the post’s susceptibility to fatigue cracking under normal service conditions.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=ANC21LA064) · AI Analytics · CC0 1.0*