# N4321D: 1978 Applebay Sailplanes ZUNI

- Status: Valid registration
- Airframe: [Applebay Sailplanes ZUNI](https://openairdocs.org/model/applebay-sailplanes-zuni) (registry code 0130202, 1 seats)
- Engine: [NONE](https://openairdocs.org/engine/none) (registry code 00000)
- Serial number: 10
- Year built: 1978
- Type: Glider
- Engine type: None
- Airworthiness: Experimental, racing, exhibition
- Airworthiness date: April 15, 1980
- Certificate issued: September 28, 2009
- Expires: June 30, 2028
- Mode S code: A52D0B
- Registered owners: [Bailie William A](https://openairdocs.org/faa-owner/BAILIE%20WILLIAM%20A), [Bailie Patricia K](https://openairdocs.org/faa-owner/BAILIE%20PATRICIA%20K)
- Location: [Saratoga Springs, UT](https://openairdocs.org/faa-place/UT/Saratoga%20Springs)
- Owner type: Co-owned
- Owner's area on the map: 40.2924° N, 111.9284° W: Placed by OpenAirDocs at the center of ZIP code 84045, within about 4 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=4321D
- Page: https://openairdocs.org/aircraft/N4321D

From the FAA registry file of October 24, 2026. ADs below are matched by the registry's airframe and engine model codes. They may apply; each AD's applicability can narrow it by serial number, part number or installed equipment. This is not a compliance determination.

## ADs that may apply (OpenAirDocs): 0 in force

### Matched by airframe (Applebay Sailplanes ZUNI)

None in force.

### Matched by engine (NONE)

None in force.

## Information bulletins (advisory)

None matched.

## 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 SEA93LA119](https://openairdocs.org/ntsb/SEA93LA119), May 23, 1993: Applebay Zuni (N4321D), Deer Park, WA, substantial damage. Probable cause: IMPROPERLY PLANNED APPROACH BY THE PIC.

## 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 19930523016339A](https://openairdocs.org/incident/19930523016339A), May 23, 1993: Amtr ZUNI (N4321D), Deer Park, WA, Substantial damage. Lost thermals. Tried land in field gear and flaps down. High sink rate. Hit ground wing low avoiding trees.

## Service difficulty reports

None filed for this aircraft. Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model.

## STCs that may be installed (OpenAirDocs)

None matched to this aircraft's models.

## Earlier aircraft with N4321D

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N4321D before.

- [Cancelled 1956-07-02](https://openairdocs.org/deregistered/N4321D-1956-07-02): Beech E18S, S/N BA-167. Exported to India. Owner: [Beech Aircraft Corp](https://openairdocs.org/faa-owner/BEECH%20AIRCRAFT%20CORP), [Wichita, KS](https://openairdocs.org/faa-place/KS/Wichita)

## Related

- Other Applebay Sailplanes ZUNI aircraft: https://openairdocs.org/model/applebay-sailplanes-zuni/aircraft.md
- The NONE engine: https://openairdocs.org/engine/none.md

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