# N91KS: 2004 Spreuer Keith COZY MK IV

- Status: Valid registration
- Airframe: [Spreuer Keith COZY MK IV](https://openairdocs.org/model/spreuer-keith-cozy-mk-iv) (registry code 05605WK, 4 seats)
- Engine: [Subaru ALL MDLS A/B](https://openairdocs.org/engine/subaru-all-mdls-a-b) (registry code 59050)
- Serial number: 0018
- Year built: 2004
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Experimental, amateur built
- Airworthiness date: August 23, 2004
- Certificate issued: February 13, 1998
- Expires: September 30, 2029
- Mode S code: AC9544
- Registered owner: [Spreuer Keith R](https://openairdocs.org/faa-owner/SPREUER%20KEITH%20R)
- Location: [Prescott Valley, AZ](https://openairdocs.org/faa-place/AZ/Prescott%20Valley)
- Owner type: Individual
- Owner's area on the map: 34.6740° N, 112.2891° W: Placed by OpenAirDocs at the center of ZIP code 86315, within about 5 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=91KS
- Page: https://openairdocs.org/aircraft/N91KS

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 (Spreuer Keith COZY MK IV)

None in force.

### Matched by engine (Subaru ALL MDLS A/B)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N91KS.

## FAA accident and incident reports

None matched to N91KS.

## 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 N91KS

The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N91KS before.

- [Cancelled 1995-08-30](https://openairdocs.org/deregistered/N91KS-1995-08-30): Denney L Dan KITFOX IV, S/N 1515. Exported to Japan. Owner: [Skystar Aircraft Corp](https://openairdocs.org/faa-owner/SKYSTAR%20AIRCRAFT%20CORP), [Nampa, ID](https://openairdocs.org/faa-place/ID/Nampa)

## Related

- Other Spreuer Keith COZY MK IV aircraft: https://openairdocs.org/model/spreuer-keith-cozy-mk-iv/aircraft.md
- The Subaru ALL MDLS A/B engine: https://openairdocs.org/engine/subaru-all-mdls-a-b.md

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