# Accident 19890702019159A: Amtr DISCOVERY, Chualar, CA, July 2, 1989

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: July 2, 1989, 14:00 local time
- Place: Chualar, CA
- Damage: Substantial damage
- Phase of flight: Practice Training Manuevers
- Operating rules: General operating rules (Part 91)
- Location: 36.5699° N, 121.4410° W: From the FAA, an estimate near the named town, within about 3 miles
- Nearby events: https://openairdocs.org/map.md?lat=36.5699&lon=-121.4410&mi=10
- Aircraft: N81D, a cancelled registration (https://openairdocs.org/deregistered/N81D-2013-10-31) (OpenAirDocs)
- Registry model: Progress Aero R And D DISCOVERY (registry code 05612UY, https://openairdocs.org/model/progress-aero-r-and-d-discovery) (OpenAirDocs)
- Registry engine: Lycoming 0-235 series (registry code 41505, https://openairdocs.org/engine/lycoming-0-235-series) (OpenAirDocs)
- Reported make and model: AMTR DISCOVERY
- Reported engine: LYC O235L2C
- Fatal injuries: 0
- Pilot flight hours: 12,000 total, 20 in this make and model, 175 in the last 90 days
- NTSB investigation: [NTSB LAX89DVM04](https://openairdocs.org/ntsb/LAX89DVM04) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19890702019159A

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

ENTERED INTO AN UNINTENTIONAL FLAT SPIN ON A TEST FLIGHT.UNABLE TO RECOVER. USED BALLISTIC CHUTE.HIGH IMPACT FORCES

## The NTSB's investigation of this event (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB LAX89DVM04](https://openairdocs.org/ntsb/LAX89DVM04), Jul 2, 1989: Progress Aero R&D Discovery (N81D), Chualar, CA, substantial damage. Probable cause: THE EXPERIMENTAL AIRCRAFT'S INADVERTENT ENTRY INTO A NON-RECOVERABLE FLAT SPIN DURING A SLOW AIRSPEED TEST; THE AERODYNAMIC CHARACTERISTICS THAT PRODUCED THE SPIN WERE NOT DETERMINED.

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. For accidents, the NTSB's own investigation is the fuller record.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.