# STC SA2668WE

- 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-50 autopilot as replacement for Sperry or Smiths rate gyros.
- Status date: June 20, 1973
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A3WE](https://openairdocs.org/tcds/A3WE)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/B06D116D08569CCA85256CC20008C710.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA2668WE

## ADs that name it (0)

None.

## Approved models (4)

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

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