# NTSB Accident CHI01LA251
> **Aero Commander S2R** · 2001-07-31 · Pierre, SD, USA · SERS
## Event
- **NTSB number:** CHI01LA251
- **Event ID:** 20010731X01570
- **Type:** Accident
- **Date:** 2001-07-31
- **Location:** Pierre, SD, USA
- **Coordinates:** 44.369743, -100.320106
## Injuries
- **Highest injury:** SERS
- **Fatal:** 0
- **Serious:** 1
- **Minor:** 0
- **Uninjured:** 0
- **Total aboard:** 1
## Aircraft
- **Make:** Aero Commander
- **Model:** S2R
- **Registration:** N5551X
- **FAR Part:** 137
- **Engines:** 1
- **Damage:** DEST
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

clearance not obtained by the pilot.  A contributing factor was the transmission line.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=CHI01LA251) · AI Analytics · CC0 1.0*