# STC SA2705WE

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Systron-Donner Corp, United States
- Description: Installation of Systron-Donner Model8160-20-P1 rate sensors in Sperry SP-77 autopilot as a replacement for Sperry or Smiths rate gyros.
- Status date: July 15, 1974
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A16WE](https://openairdocs.org/tcds/A16WE)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C5FF1808D9A4279F85256CC20008C7AB.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA2705WE

## ADs that name it (0)

None.

## Approved models (3)

- The Boeing Company 737-100 Series ([TCDS A16WE](https://openairdocs.org/tcds/A16WE))
- The Boeing Company 737-200 Series ([TCDS A16WE](https://openairdocs.org/tcds/A16WE))
- The Boeing Company 737-200C Series ([TCDS A16WE](https://openairdocs.org/tcds/A16WE))

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