# NTSB Accident LAX99LA071
> **Piper PA-18A-150** · 1999-01-10 · TUCSON, AZ, USA · NONE
## Event
- **NTSB number:** LAX99LA071
- **Event ID:** 20001204X00077
- **Type:** Accident
- **Date:** 1999-01-10
- **Location:** TUCSON, AZ, USA
- **Coordinates:** 32.150974, -110.930328
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 2
- **Total aboard:** 2
## Aircraft
- **Make:** Piper
- **Model:** PA-18A-150
- **Registration:** N8980D
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The student pilot's inadvertent activation of the right heel brake on the conventional geared aircraft, which resulted in a loss of directional control and an inadvertent ground loop.  A contributing factor was inadequate supervision.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=LAX99LA071) · AI Analytics · CC0 1.0*