# STC SA5840SW

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Texas Aviation Services, United States
- Description: Installation of dual independent Canadian Marconi MCA771 Omega Navigation Systems and dual B&D Instruments 2504 true airspeed computers.
- Applied: November 26, 1984
- Status date: March 11, 2010
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A3WE](https://openairdocs.org/tcds/A3WE)
- Certificate PDF: https://openairdocs.org/files/sha256/cb/c5/cbc59c8913740eea60b308f8917aa8240251ca0ead3a18bf2550a638a82765ef
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/9E24D95684D4708186257C45005D4EBF.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA5840SW

## ADs that name it (0)

None.

## Approved models (2)

- The Boeing Company 727-100 Series ([TCDS A3WE](https://openairdocs.org/tcds/A3WE))
- The Boeing Company 727-200 Series ([TCDS A3WE](https://openairdocs.org/tcds/A3WE))

## What the certificate says

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

## Every issue (1)

- March 11, 2010: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/cb/c5/cbc59c8913740eea60b308f8917aa8240251ca0ead3a18bf2550a638a82765ef)

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