# STC SA631SW

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Northwest Airlines, Inc., United States
- Description: Installation of Fairchild A-100 voice recorder system.
- Applied: April 6, 1966
- Status date: November 14, 1986
- Product: Aircraft, Large Airplane
- Data sheets: [TCDS 7A1](https://openairdocs.org/tcds/7A1)
- Certificate PDF: https://openairdocs.org/files/sha256/35/ee/35ee3add16584d1f35d6300a2ba768ae50a6487ed8a6455bb0981eff6022dec9
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID199604330420260722174750.0001
- DRS record last changed: July 22, 2026
- Page: https://openairdocs.org/stc/SA631SW

## ADs that name it (0)

None.

## Approved models (4)

- Fairchild Industries Inc. F27 ([TCDS 7A1](https://openairdocs.org/tcds/7A1))
- Fairchild Industries Inc. F27-A ([TCDS 7A1](https://openairdocs.org/tcds/7A1))
- Fairchild Industries Inc. F27-F ([TCDS 7A1](https://openairdocs.org/tcds/7A1))
- Fairchild Industries Inc. F27-J ([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/sha256/35/ee/35ee3add16584d1f35d6300a2ba768ae50a6487ed8a6455bb0981eff6022dec9)

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