# NTSB Accident SEA07CA180
> **Robinson R22** · 2007-06-25 · Tucson, AZ, USA · NONE
## Event
- **NTSB number:** SEA07CA180
- **Event ID:** 20070723X01005
- **Type:** Accident
- **Date:** 2007-06-25
- **Location:** Tucson, AZ, USA
- **Coordinates:** 32.115833, -110.940834
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 2
- **Total aboard:** 2
## Aircraft
- **Make:** Robinson
- **Model:** R22
- **Registration:** N980SM
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

The certified flight instructor's inadequate supervision of the practice autorotation.  Contributing factors included the terrain drop off and the failure of the pilot undergoing instruction to maintain adequate rotor rpm.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=SEA07CA180) · AI Analytics · CC0 1.0*