# STC SA853WE

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Northwest Airlines, Inc., United States
- Description: Bendix 4B39 solid state voltage and frequency control modification to Jack & Heintz F-35-5 rotary inverter.
- Applied: November 12, 1964
- Status date: November 14, 1986
- Product: Aircraft, Large Airplane
- Data sheets: [TCDS 7A1](https://openairdocs.org/tcds/7A1)
- Certificate PDF: https://openairdocs.org/files/sha256/34/6e/346e2b788bbae9c0362857dc90da2ad608169a0e3f2d336fc8fa2da70bf06b41
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID114971663520260729141907.0001
- DRS record last changed: July 29, 2026
- Page: https://openairdocs.org/stc/SA853WE

## ADs that name it (0)

None.

## Approved models (1)

- Fairchild Industries Inc. F27 Series ([TCDS 7A1](https://openairdocs.org/tcds/7A1))

## What the certificate says

The certificate is a scan without a text layer; open the PDF to read it.

## Every issue (1)

- November 14, 1986: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/34/6e/346e2b788bbae9c0362857dc90da2ad608169a0e3f2d336fc8fa2da70bf06b41)

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