# STC SA1981WE

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Sperry Flight System Div, United States
- Description: Installation of Sperry Model SP-40C automatic flight control system (P/N 1782874-512).
- Status date: November 28, 1969
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A3EU](https://openairdocs.org/tcds/A3EU)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/96C6A26BE7A0FDFF85256CC10083D3B2.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA1981WE

## ADs that name it (0)

None.

## Approved models (1)

- Raytheon Aircraft Company DH.125 Series 400A ([TCDS A3EU](https://openairdocs.org/tcds/A3EU))

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