# STC SH8321SW

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Texas Aviation Services, United States
- Description: Installation of Bendix/King electronic flight instrument system (EFIS)/50.
- Applied: April 26, 1991
- Status date: March 11, 2010
- Product: Aircraft, Rotorcraft
- Certification basis: Part 21
- Data sheets: [TCDS H4SW](https://openairdocs.org/tcds/H4SW)
- Certificate PDF: https://openairdocs.org/files/sha256/05/b8/05b8a453e7974cc67b0b45ada1994f1b4577100176186ed7b76ba3f7fd7e9b47
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/A66C803402D929F886257C450060A6CD.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SH8321SW

## ADs that name it (0)

None.

## Approved models (1)

- Bell Helicopter Textron Inc. 412 ([TCDS H4SW](https://openairdocs.org/tcds/H4SW))

## What the certificate says

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

## Every issue (1)

- March 11, 2010: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/05/b8/05b8a453e7974cc67b0b45ada1994f1b4577100176186ed7b76ba3f7fd7e9b47)

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From OpenAirDocs.org, an independent open copy of FAA and NTSB data. Only the Federal Register edition on govinfo.gov is the official legal text of an AD.