# STC SA691NW

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Sorm Inc, United States
- Description: Installation of Sorm Bulk Liquid Cargo Takn Assembly
- Applied: September 22, 1978
- Status date: November 22, 1978
- Product: Aircraft, Large Airplane
- Certification basis: Part 21
- Data sheets: [TCDS 1A19](https://openairdocs.org/tcds/1A19)
- Certificate PDF: https://openairdocs.org/files/sha256/6d/67/6d67fee00195cc19a82dd8757ec2c6355c43c0f1fa3de47137a8dc6ae2305dc1
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/99E1EB9F4E2C157586257A41006EE708.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA691NW

## ADs that name it (0)

None.

## Approved models (1)

- Viking Air Limited DHC-4A ([TCDS 1A19](https://openairdocs.org/tcds/1A19))

## What the certificate says

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

## Every issue (1)

- November 22, 1978: Issued, Current. [certificate](https://openairdocs.org/files/sha256/6d/67/6d67fee00195cc19a82dd8757ec2c6355c43c0f1fa3de47137a8dc6ae2305dc1)

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