# STC SA2686SO

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Quiet Technology Venture, Ltd, United States
- Description: Installation of Hush Kits. (707-100B)
- Status date: January 23, 1990
- 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/353E842B28EB4DD985256CC20008C752.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA2686SO

## ADs that name it (0)

None.

## Approved models (1)

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

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