# N685GA: 1991 Armstrong Gary J MONTANA COYOTE PR 1

- Status: Valid registration
- Airframe: [Armstrong Gary J MONTANA COYOTE PR 1](https://openairdocs.org/model/armstrong-gary-j-montana-coyote-pr-1) (registry code 05623Q8, 2 seats)
- Engine: [Amateur-built UNKNOWN ENG](https://openairdocs.org/engine/amateur-built-unknown-eng) (registry code 99999)
- Serial number: 1004
- Year built: 1991
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Experimental, amateur built
- Airworthiness date: March 22, 1993
- Certificate issued: July 20, 1993
- Expires: November 30, 2027
- Mode S code: A91661
- Registered owner: [Armstrong Gary J](https://openairdocs.org/faa-owner/ARMSTRONG%20GARY%20J)
- Location: [Billings, MT](https://openairdocs.org/faa-place/MT/Billings)
- Owner type: Individual
- Owner's area on the map: 45.5641° N, 108.3336° W: Placed by OpenAirDocs at the center of ZIP code 59101, within about 14 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=685GA
- Page: https://openairdocs.org/aircraft/N685GA

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 (Armstrong Gary J MONTANA COYOTE PR 1)

None in force.

### Matched by engine (Amateur-built UNKNOWN ENG)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N685GA.

## FAA accident and incident reports

None matched to N685GA.

## 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.

## Related

- Other Armstrong Gary J MONTANA COYOTE PR 1 aircraft: https://openairdocs.org/model/armstrong-gary-j-montana-coyote-pr-1/aircraft.md
- The Amateur-built UNKNOWN ENG engine: https://openairdocs.org/engine/amateur-built-unknown-eng.md

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