# STC SA181NW

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Pacific Alaska Airlines Inc, United States
- Description: Installation of bulk liquid cargo tank system
- Applied: May 2, 1975
- Status date: May 12, 1975
- Product: Aircraft, Large Airplane
- Certification basis: Part 21
- Data sheets: [TCDS 6A4](https://openairdocs.org/tcds/6A4)
- Certificate PDF: https://openairdocs.org/files/sha256/63/ea/63ea2dbb694f0d252bdff9444fc28bb99aa54e1c5579fbd52cabd1dd993939a4
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/817B9BCE80B2181586257AE1005808F2.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA181NW

## 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)

- May 12, 1975: Issued, Current. [certificate](https://openairdocs.org/files/sha256/63/ea/63ea2dbb694f0d252bdff9444fc28bb99aa54e1c5579fbd52cabd1dd993939a4)

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