# STC SA2689SO

- Type: Supplemental type certificate
- Status: Current, Surrendered
- Holder: Page AvJet Corp, United States
- Description: Installation of a Dual Litton LTN-72RL Inertial Navigation System.
- Status date: July 9, 2008
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 4A26](https://openairdocs.org/tcds/4A26)
- Certificate PDF: https://openairdocs.org/files/sha256/7f/31/7f31d1f7a6cb7875a679b9108a72f8ffc0b8a3e7e47812762f51bdcea06256a3
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/E06180985CBA5739862574BE00765AB0.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA2689SO

## ADs that name it (0)

None.

## Approved models (1)

- The Boeing Company 707-300 Series ([TCDS 4A26](https://openairdocs.org/tcds/4A26))

## What the certificate says

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

## Every issue (1)

- July 9, 2008: Surrendered, Current. [certificate](https://openairdocs.org/files/sha256/7f/31/7f31d1f7a6cb7875a679b9108a72f8ffc0b8a3e7e47812762f51bdcea06256a3)

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