# N15457: 1950 Northwestern PORTERFIELD 35-70

- Status: Valid registration
- Airframe: [Northwestern PORTERFIELD 35-70](https://openairdocs.org/model/northwestern-porterfield-35-70) (registry code 6480134, 2 seats)
- Engine: [Amateur-built UNKNOWN ENG](https://openairdocs.org/engine/amateur-built-unknown-eng) (registry code 99999)
- Data sheets: [TCDS ATC 567](https://openairdocs.org/tcds/ATC%20567) (Rankin Joe) (OpenAirDocs)
- Serial number: 157
- Year built: 1950
- Type: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Standard, normal
- Airworthiness date: September 22, 1950
- Certificate issued: February 17, 2016
- Expires: February 28, 2029
- Mode S code: A0DC32
- Registered owner: [Prather Carl Lynn](https://openairdocs.org/faa-owner/PRATHER%20CARL%20LYNN)
- Location: [Gilroy, CA](https://openairdocs.org/faa-place/CA/Gilroy)
- Owner type: Individual
- Owner's area on the map: 37.0162° N, 121.5594° W: Placed by OpenAirDocs at the center of ZIP code 95020, within about 7 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=15457
- Page: https://openairdocs.org/aircraft/N15457

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 (Northwestern PORTERFIELD 35-70)

None in force.

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

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N15457.

## FAA accident and incident reports

None matched to N15457.

## 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) (2)

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 (Northwestern PORTERFIELD 35-70)

- [STC SA01734SE](https://openairdocs.org/stc/SA01734SE): Application of Stewart Systems synthetic fabric covering system to aircraft fuselage, wings, tail surfaces, control surfaces and related parts. Andrew D. Humphrey
- [STC SA00478CH](https://openairdocs.org/stc/SA00478CH): Installation of Cooper Superflite 102 Fabric. Aviation Products Systems Inc

## Related

- Other Northwestern PORTERFIELD 35-70 aircraft: https://openairdocs.org/model/northwestern-porterfield-35-70/aircraft.md
- The Amateur-built UNKNOWN ENG engine: https://openairdocs.org/engine/amateur-built-unknown-eng.md

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