# NTSB Accident NYC91LA066
> **SCHWEIZER SGS 2-33A** · 1991-01-26 · WILLIAMSTOWN, MA, USA · NONE
## Event
- **NTSB number:** NYC91LA066
- **Event ID:** 20001212X16377
- **Type:** Accident
- **Date:** 1991-01-26
- **Location:** WILLIAMSTOWN, MA, USA
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 1
- **Total aboard:** 1
## Aircraft
- **Make:** SCHWEIZER
- **Model:** SGS 2-33A
- **Registration:** N5763S
- **FAR Part:** 091
- **Engines:** —
- **Damage:** SUBS
## Conditions
- **Light:** NR
- **Weather:** VMC
## Probable cause

THE FAILURE OF THE PILOT TO RETRACT THE SPEED BRAKES DURING THE PREFLIGHT, WHICH RESULTED IN THE TOW AIRPLANE BEING UNABLE TO ATTAIN SUFFICIENT ALTITUDE PRIOR TO RELEASING THE GLIDER, AND THE SUBSEQUENT LANDING OF THE GLIDER ON UNSUITABLE TERRAIN.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=NYC91LA066) · AI Analytics · CC0 1.0*