# STC SA1660SO

- Type: Supplemental type certificate
- Status: Current, Surrendered
- Holder: Page AvJet Corp, United States
- Description: Installation of a dual Sperry EDZ801 electronic flight instrument system (EFIS).
- Status date: July 9, 2008
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A3WE](https://openairdocs.org/tcds/A3WE)
- Certificate PDF: https://openairdocs.org/files/sha256/60/cf/60cf179fe3c7f2092007cfdbf5faee6f179adf6893e00d748dea9cfd96d48473
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/F886800BC7411BB8862574A500572FE2.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA1660SO

## ADs that name it (0)

None.

## Approved models (1)

- The Boeing Company 727-100 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)

- July 9, 2008: Surrendered, Current. [certificate](https://openairdocs.org/files/sha256/60/cf/60cf179fe3c7f2092007cfdbf5faee6f179adf6893e00d748dea9cfd96d48473)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.