# N421K: Brewster FLEET 2

- Status: Valid registration
- Airframe: [Brewster FLEET 2](https://openairdocs.org/model/brewster-fleet-2) (registry code 1461204, 2 seats)
- Engine: [Kinner K5 series](https://openairdocs.org/engine/kinner-k5-series) (registry code 37503)
- Data sheets: [TCDS ATC 131](https://openairdocs.org/tcds/ATC%20131) (Brewster Aeronautical Corporation) (OpenAirDocs)
- Serial number: 144
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Standard
- Airworthiness date: August 2, 1962
- Certificate issued: July 28, 2026
- Expires: July 31, 2033
- Mode S code: A50037
- Registered owner: [Engelskirger Karl D](https://openairdocs.org/faa-owner/ENGELSKIRGER%20KARL%20D)
- Location: [Valley City, OH](https://openairdocs.org/faa-place/OH/Valley%20City)
- Owner type: Individual
- Owner's area on the map: 41.2403° N, 81.9278° W: Placed by OpenAirDocs at the center of ZIP code 44280, within about 3 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=421K
- Page: https://openairdocs.org/aircraft/N421K

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. The registry lists only the engine series, so ADs for every Kinner K5 model are included.

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

### Matched by airframe (Brewster FLEET 2)

None in force.

### Matched by engine (Kinner K5 series)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N421K.

## FAA accident and incident reports

None matched to N421K.

## 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) (5)

Approved for this aircraft's airframe or engine model, in force first, then newest. The registry doesn't record which STCs an aircraft has; its records do.

### Approved for the airframe (Brewster FLEET 2)

- [STC SA04652CH](https://openairdocs.org/stc/SA04652CH): To allow use of 100R grade aviation fuel meeting Swift Fuel, LLC specification. Swift Fuels LLC
- [STC SA00478CH](https://openairdocs.org/stc/SA00478CH): Installation of Cooper Superflite 102 Fabric. Aviation Products Systems Inc
- [STC SA1323GL](https://openairdocs.org/stc/SA1323GL): Surrendered and incorporated into STC SA00478CH. Cooper Aviation Supply Company, Inc
- [STC SA1350WE](https://openairdocs.org/stc/SA1350WE): Replace existing fabric on wings, fuselage, empennage and/or control surfaces with fiberglass cloth. Ceconite, Inc
- [STC SA1242WE](https://openairdocs.org/stc/SA1242WE): Ceconite 101 covering of complete aircraft. Cooper Engineering Corporation

## Related

- Other Brewster FLEET 2 aircraft: https://openairdocs.org/model/brewster-fleet-2/aircraft.md
- The Kinner K5 series engine: https://openairdocs.org/engine/kinner-k5-series.md

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