# STC SA81NW

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Collins Radio Company, United States
- Description: Minor modifications to pilot's instrument panel and relocation of autopilot accelerometer and rate gyros for improved performance. (707-153B)
- Status date: December 7, 1973
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 4A21](https://openairdocs.org/tcds/4A21)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DF19AB14DAF8318785256CC20058E67C.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA81NW

## ADs that name it (0)

None.

## Approved models (1)

- The Boeing Company 707 ([TCDS 4A21](https://openairdocs.org/tcds/4A21))

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