# N81D: 1988 Progress Aero R And D DISCOVERY, registration cancelled 2013-10-31

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: October 31, 2013
- Status when cancelled: Registration expired, pending cancellation
- Airframe: [Progress Aero R And D DISCOVERY](https://openairdocs.org/model/progress-aero-r-and-d-discovery) (registry code 05612UY)
- Engine: [Lycoming 0-235 series](https://openairdocs.org/engine/lycoming-0-235-series) (registry code 41505)
- Data sheets: [TCDS E-223](https://openairdocs.org/tcds/E-223) (OpenAirDocs)
- Serial number: 101
- Year built: 1988
- Type of aircraft: Fixed wing single engine
- Engine type: 4 cycle
- Airworthiness: Experimental, amateur built
- Airworthiness date: April 25, 1989
- Certificate issued: June 15, 1988
- Last registry action: January 23, 1995
- Mode S code: AB074E
- Owner when cancelled: [Progress Aero R And D Inc](https://openairdocs.org/faa-owner/PROGRESS%20AERO%20R%20AND%20D%20INC)
- Location: [Monterey, CA](https://openairdocs.org/faa-place/CA/Monterey)
- Owner type: Corporation
- Owner's area on the map: 36.5614° N, 121.8102° W: Placed by OpenAirDocs at the center of ZIP code 93940, within about 3 miles (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N81D
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=81D
- Page: https://openairdocs.org/deregistered/N81D-2013-10-31

From the FAA registry file of October 29, 2026, cancelled registrations. Owners' street addresses are left out. The Mode S code belongs to the N-number, not the airframe.

ADs and bulletins for the Progress Aero R And D DISCOVERY: https://openairdocs.org/model/progress-aero-r-and-d-discovery.md

## NTSB investigations (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.

## FAA accident and incident reports (1)

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.

- [Accident 19890702019159A](https://openairdocs.org/incident/19890702019159A), Jul 2, 1989: Amtr DISCOVERY (N81D), Chualar, CA, Substantial damage. Entered into an unintentional flat spin on a test flight. Unable to recover. Used ballistic chute. High impact forces

## Other aircraft with N81D

- [Registered now](https://openairdocs.org/aircraft/N81D): Textron 182T, S/N 18283239, built 2023
- [Cancelled 1971-02-12](https://openairdocs.org/deregistered/N81D-1971-02-12): Beech G18S, S/N BA612, built 1962. Owner: [Burton Supply Co](https://openairdocs.org/faa-owner/BURTON%20SUPPLY%20CO), [Youngstown, OH](https://openairdocs.org/faa-place/OH/Youngstown)
- [Cancelled (date not recorded)](https://openairdocs.org/deregistered/N81D-undated): Beechcraft-Hawker BH-125-600A, S/N 256011. Triennial form not returned

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