# STC ST510SO

- Type: Supplemental type certificate
- Status: Current, Surrendered
- Holder: Avitas Engineering, United States
- Description: Installation of dual HF communications system using vertical fin leading edge slotted antenna. (727-225)
- Applied: December 14, 1971
- Status date: January 6, 2010
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A3WE](https://openairdocs.org/tcds/A3WE)
- Certificate PDF: https://openairdocs.org/files/sha256/90/3b/903b776ba4a03fbda111faeedd4286a5a8602f8bd6cba8a807a3379e7975d5b1
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D6228768537559F5862576FD006E4F0F.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/ST510SO

## ADs that name it (0)

None.

## Approved models (1)

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

## What the certificate says

The certificate is a scan without a text layer; open the PDF to read it.

## Every issue (1)

- January 6, 2010: Surrendered, Current. [certificate](https://openairdocs.org/files/sha256/90/3b/903b776ba4a03fbda111faeedd4286a5a8602f8bd6cba8a807a3379e7975d5b1)

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