# STC SA2792SO

- Type: Supplemental type certificate
- Status: Current, Surrendered
- Holder: Pemco Aeroplex Inc, United States
- Description: Installation of a digital clock system. (747-E4B)
- Applied: October 9, 1989
- Status date: August 4, 2009
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A20WE](https://openairdocs.org/tcds/A20WE)
- Certificate PDF: https://openairdocs.org/files/sha256/a8/eb/a8eb6758bdf3bb8cfdf05e8aea58794a465619e32fdc921de26e56b7a78c87b0
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/71C69BA35606E8458625778F0074D5D1.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA2792SO

## ADs that name it (0)

None.

## Approved models (1)

- The Boeing Company 747-200B Series ([TCDS A20WE](https://openairdocs.org/tcds/A20WE))

## What the certificate says

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

## Every issue (1)

- August 4, 2009: Surrendered, Current. [certificate](https://openairdocs.org/files/sha256/a8/eb/a8eb6758bdf3bb8cfdf05e8aea58794a465619e32fdc921de26e56b7a78c87b0)

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