# STC SH1535SO

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Sikorsky Aircraft, United States
- Description: Installation of the Collins ANS-31C area navigation system to include appropriate interface with the Sperry SPZ-7000 automatic flight control system.
- Status date: December 30, 1983
- Product: Aircraft, Rotorcraft
- Certification basis: Part 21
- Data sheets: [TCDS H1NE](https://openairdocs.org/tcds/H1NE)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/10F0A13D7206D87D85256CC2005C2EA0.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SH1535SO

## ADs that name it (0)

None.

## Approved models (1)

- Sikorsky Aircraft Corporation S-76A ([TCDS H1NE](https://openairdocs.org/tcds/H1NE))

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