# Northwestern PORTERFIELD 35-70

- Type: Aircraft model (FAA registry)
- Registry code: 6480134
- Manufacturer (registry): NORTHWESTERN
- Model: PORTERFIELD 35-70
- Aircraft type: Fixed wing single engine
- Category: Airplane
- Engines: 1 · Reciprocating
- Seats: 2
- Weight class: Up to 12,499 lb
- Cruise speed: 76 mph
- Certification: Type certificated
- Data sheet: [TCDS ATC 567](https://openairdocs.org/tcds/ATC%20567) (OpenAirDocs)
- Holder: Rankin Joe
- Registered aircraft: 3
- Page: https://openairdocs.org/model/northwestern-porterfield-35-70

Model codes come from the FAA registry's reference file. ADs are matched to them by model name and maker.

## ADs that may apply (OpenAirDocs)

Matched to this model by model name and maker. Each AD's applicability may narrow it by serial number, part number or equipment.

None matched.

## Registered aircraft (3)

- [N14475](https://openairdocs.org/aircraft/N14475): [Smith Peter A](https://openairdocs.org/faa-owner/SMITH%20PETER%20A), [Lockport, NY](https://openairdocs.org/faa-place/NY/Lockport), S/N 132
- [N15444](https://openairdocs.org/aircraft/N15444): [Richards Thomas D](https://openairdocs.org/faa-owner/RICHARDS%20THOMAS%20D), [Krum, TX](https://openairdocs.org/faa-place/TX/Krum), built 1935, S/N 144
- [N15457](https://openairdocs.org/aircraft/N15457): [Prather Carl Lynn](https://openairdocs.org/faa-owner/PRATHER%20CARL%20LYNN), [Gilroy, CA](https://openairdocs.org/faa-place/CA/Gilroy), built 1950, S/N 157

## NTSB investigations

None matched to aircraft with this model.

## FAA accident and incident reports

None matched to aircraft with this model.

## STCs that may be installed (OpenAirDocs) (2)

Approved for this model: the STC's model list names it on its data sheet, or a series that includes it. In force first, then newest. The registry doesn't record which STCs an aircraft has.

- [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

## PMA parts (OpenAirDocs) (7)

Current parts manufacturer approvals (PMA): parts the FAA has approved companies to make as replacements or modifications. Each record lists its models as free text; OpenAirDocs matched them to this model on its data sheet, so check the FAA record before relying on it. Newest first.

- [73-CFG-R](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID183391044820260806152426.0001): Fuel Quantity Indication Placard. Swift Fuels, LLC · PMA PQ04423CE · Modification part · Jul 20, 2026
- [S1069](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID141989316920260806152333.0001): 100R Fuel Placard. Swift Fuels, LLC · PMA PQ04423CE · Modification part · Jul 20, 2026
- [V674UL94](https://drs.faa.gov/browse/excelExternalWindow/E1C1EF6CEE5DC2EE862585990051C803.0001): UL94 Fuel Placard. Swift Fuels, LLC · PMA PQ04423CE · Modification part · Jun 7, 2020
- [SF-D](https://drs.faa.gov/browse/excelExternalWindow/F09A70034CB3EF9885257038006C5719.0001): System II Finish Materials Kit. AAR Distribution · Modification part · Mar 6, 2001
- [SF-P](https://drs.faa.gov/browse/excelExternalWindow/9C365425FEB43FE985257038006C5723.0001): Standard System Finish Materials Kit. AAR Distribution · Modification part · Mar 6, 2001
- [SF-102](https://drs.faa.gov/browse/excelExternalWindow/8549C874FBB403AB85257038006C5709.0001): Fabric. AAR Distribution · Modification part · Mar 6, 2001
- [SF-C](https://drs.faa.gov/browse/excelExternalWindow/2D5350BB7885975385257038006C5711.0001): Dope Finish Materials Kit. AAR Distribution · Modification part · Mar 6, 2001

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.