# NTSB Accident LAX89DUG04
> **HOLMAN/SEARS HS-1** · 1989-05-27 · RIALTO, CA, USA · SERS
## Event
- **NTSB number:** LAX89DUG04
- **Event ID:** 20001213X28330
- **Type:** Accident
- **Date:** 1989-05-27
- **Location:** RIALTO, CA, USA
- **Coordinates:** 34.100246, -117.379653
## Injuries
- **Highest injury:** SERS
- **Fatal:** 0
- **Serious:** 1
- **Minor:** 0
- **Uninjured:** 0
- **Total aboard:** 1
## Aircraft
- **Make:** HOLMAN/SEARS
- **Model:** HS-1
- **Registration:** N90HS
- **FAR Part:** 091
- **Engines:** 1
- **Damage:** SUBS
## Conditions
- **Light:** DAYL
- **Weather:** VMC
## Probable cause

FAILURE OF THE PILOT TO MAINTAIN SUFFICIENT AIRSPEED, WHILE TURNING AFTER TAKEOFF, WHICH RESULTED IN A STALL/SPIN. CONTRIBUTING FACTORS WERE:  IMPROPER PLANNING/DECISION BY THE PILOT BY TEST FLYING AN AIRPLANE THAT HE WAS NOT PROPERLY CERTIFICATED TO OPERATE, HIS LACK OF FAMILIARITY WITH THE AIRCRAFT, AND OVERCONFIDENCE IN HIS PERSONAL ABILITY.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=LAX89DUG04) · AI Analytics · CC0 1.0*