# STC SA1478GL

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: U.S. Technical Consultants Inc., United States
- Description: Installation of the GTE Airfone air-to-ground public telephone system(SEATFONE).
- Applied: February 13, 1990
- Status date: September 29, 2006
- 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/e8/5c/e85cca033f61afecf60e75c17f0a3f2b1626d4e3654ec9153a075c73d69985fc
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/9EC16A745D11951F862572D50049826F.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA1478GL

## ADs that name it (0)

None.

## Approved models (1)

- The Boeing Company 727-200 Series ([TCDS A3WE](https://openairdocs.org/tcds/A3WE))

## 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.

Part 4b of the Civil Air Regulations.

See Type Certificate Data Sheet A3WE for complete certification basis.

Installation of the air-to-ground Public Telephone System (SEATFONE), in accordance with GTE Airfone STC Documentation Checklist AFP 70-0295-00, Rev. 1, dated April 11, 1990 or later FAA Approved revision.

1. Compatibility of this design change with previously approved modifications must be determined by the installer.

2. All airplane seatbacks on which a seatfone is mounted must be the breakaway type or there must be no injurious objects in the head strike radius.

3. If the holder agrees to permit another person to use this certificate to alter the product, the holder shall give the other person written evidence of that permission.

U.S. Technical Consultants, Inc.

2461 E. Orangethorpe, STE 105 Fullerton, CA 92831 A3WE Make : Boeing Model :

727-200 Series Date of application : February 13, 1990

Date of issuance : April 23, 1990

Date reissued : April 4 , 2002; July 9, 2002; September 29, 2006

( Signature) Charles L. Smalley Manager, Systems and Flight Test Branch Chicago Aircraft Certification Office

( Title)

## Every issue (1)

- September 29, 2006: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/e8/5c/e85cca033f61afecf60e75c17f0a3f2b1626d4e3654ec9153a075c73d69985fc)

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