# STC SA157NW

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Pacific Alaska Airlines Inc, United States
- Description: Installation of bulk liquid cargo tank system
- Applied: November 6, 1974
- Status date: February 4, 1975
- Product: Aircraft, Large Airplane
- Certification basis: Part 21
- Data sheets: [TCDS 6A4](https://openairdocs.org/tcds/6A4)
- Certificate PDF: https://openairdocs.org/files/sha256/2a/11/2a11eefb781e785a0543f5cef585f1e59ff9570c82c7ae5d62124bf3da768a8e
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/E43AFC94980CBCEF86257AE10056B1C5.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA157NW

## ADs that name it (0)

None.

## Approved models (1)

- The Boeing Company DC-6B ([TCDS 6A4](https://openairdocs.org/tcds/6A4))

## What the certificate says

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

## Every issue (1)

- February 4, 1975: Issued, Current. [certificate](https://openairdocs.org/files/sha256/2a/11/2a11eefb781e785a0543f5cef585f1e59ff9570c82c7ae5d62124bf3da768a8e)

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