# STC SA7374SW

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Ontic Engineering and Manufacturing Inc., United States
- Description: Installation of a UNS-1A flight management system.
- Applied: December 21, 1987
- Status date: March 17, 2022
- Product: Aircraft, Small Airplane
- Certification basis: Part 3, Part 21
- Data sheets: [TCDS A5SW](https://openairdocs.org/tcds/A5SW)
- Certificate PDF: https://openairdocs.org/files/sha256/bf/e5/bfe5fc2ee62f9745bdd785bbfb377640ec37f3c6a3045a39ce05038618a01548
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/04A87076694E77FB8625882B00555405.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA7374SW

## ADs that name it (0)

None.

## Approved models (1)

- M7 Aerospace LLC SA227-TT ([TCDS A5SW](https://openairdocs.org/tcds/A5SW))

## What the certificate says

Read from the PDF's text layer, without the form's printed wording; the layout is lost and the order can differ. The PDF is the record.

SA7374SW Ontic Engineering and Manufacturing, Inc.

1176 Telecom Drive Creedmoor, NC 27522 Part 3 the Civil Air Regulations A5SW Fairchild SA227-TT Installation of UNS-1A Flight Management System in accordance with Drawing List FGA85L001, Rev. B dated March 26, 1988, or later FAA approved revision.

FAA Approved Airplane Flight Manual Supplement dated 2/25/88 is required. The installer must determine whether this design change is compatible with previously approved modifications. If the holder agrees to permit another person to use this certificate to alter a product, the holder must give the other person written evidence of that permission.

December 21, 1987 June 28, 2012; March 17, 2022 February 25, 1988 S. Frances Cox Acting Manager, Fort Worth ACO Branch, Compliance & Airworthiness Division Aircraft Certification Service 2

SA7374SW 2

## Every issue (2)

- March 17, 2022: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/bf/e5/bfe5fc2ee62f9745bdd785bbfb377640ec37f3c6a3045a39ce05038618a01548)
- June 28, 2012: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/6c/72/6c72b32774a69d8882ce22506731bb63329b84a8eba56d63b999816be063128d)

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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.