# STC SA3-258

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Northwest Airlines Inc., United States
- Description: C-O-Two visual smoke detector, Type A1-V, P/N 74800.
- Applied: May 26, 1958
- Status date: June 3, 1958
- Product: Aircraft, Large Airplane
- Data sheets: [TCDS A-762](https://openairdocs.org/tcds/A-762)
- Certificate PDF: https://openairdocs.org/files/sha256/62/ef/62ef520267a27ebfcd30cab862cb10c487be4b74cf393c2029acc5494e4b7674
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID147788033720260715181536.0001
- DRS record last changed: July 15, 2026
- Page: https://openairdocs.org/stc/SA3-258

## ADs that name it (0)

None.

## Approved models (3)

- McDonnell Douglas Corporation DC-4 ([TCDS A-762](https://openairdocs.org/tcds/A-762))
- The Boeing Company C54A-DC ([TCDS A-762](https://openairdocs.org/tcds/A-762))
- The Boeing Company C54B-DC ([TCDS A-762](https://openairdocs.org/tcds/A-762))

## What the certificate says

The certificate has no text we could read; open the PDF to read it.

## Every issue (1)

- June 3, 1958: Issued, Current. [certificate](https://openairdocs.org/files/sha256/62/ef/62ef520267a27ebfcd30cab862cb10c487be4b74cf393c2029acc5494e4b7674)

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