# STC ST9430SC-D

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: American Airlines Inc, United States
- Description: Modification of aircraft flight and service interphone system. (727-223)
- Applied: November 15, 1999
- Status date: January 25, 2000
- Product: Aircraft, Large Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A3WE](https://openairdocs.org/tcds/A3WE)
- Certificate PDF: https://openairdocs.org/files/sha256/94/f0/94f0b6afdc068762c0aa47a0a4827cb1fce266f09a25edca2bebdca8ce88b4d4
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/A7151CEC0FEB066F85256CC3000374E1.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/ST9430SC-D

## 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.

ftrattd States of amtrica Bepartment of'Cransportation—federal 2toiation administration Supplemental 'Cgpe Certificate ST 9430 SC-D American Airlines, Inc.

P. O. Box 582809 MD176 Tulsa, Oklahoma 74158-2809 ,<^^l*^^

•Jte&u/a&onA'.

A3 WE Boeing 727-223 Modification of aircraft flight and service interphone system in accordance with American Airlines Engineering Change Order (ECO) H4433XX dated 12/27/99 and Prototype Revision Form 7721-6 dated 1 /25/00 or later DAS 1SW approved revisions of each This approval should not be incorporated in any aircraft of this specific model until compatibility of this modification with previously approved modifications has been determined by the installer.

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.

C77 Jea<?n4v^^ <S$c6nwnt&Jra/t>r-J& 11/15/99 1/25/00 R. D. Iliff DAS 1SW Coordinator (Title)

f*AFo«M 8110-2(10-68)

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee) (Address of transferee) (Number and street) (City, State, and ZIP code) from (Name of grantor) (Print or type) (Address of grantor) (Number C street) (City, State, and ZIP code) Extent of Authority (if licensing agreement):

Signature of grantor (In ink)

## Every issue (1)

- January 25, 2000: Issued, Current. [certificate](https://openairdocs.org/files/sha256/94/f0/94f0b6afdc068762c0aa47a0a4827cb1fce266f09a25edca2bebdca8ce88b4d4)

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