# STC SA1-571

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: United Airlines Inc, United States
- Description: Installation of flight data recorder.
- Applied: April 10, 1961
- Status date: November 30, 2011
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21, Part 25
- Data sheets: [TCDS A-814](https://openairdocs.org/tcds/A-814)
- Certificate PDF: https://openairdocs.org/files/sha256/a4/41/a441b88cc962cb1dca04b34a32c7f298b16c836ffd89c0daa610db1f4b72c222
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/680A1F36A0CAF799862579D400784079.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA1-571

## ADs that name it (0)

None.

## Approved models (1)

- Vickers-Armstrongs (Aircraft Limited) Viscount 745D ([TCDS A-814](https://openairdocs.org/tcds/A-814))

## 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.

United States Of America Department of Transportation - Federal Aviation Administration Supplemental Type Certificate This certificate has been reissued to replace the original certificate reported as lost.

600 Jefferson Street Houston, Texas 77002 Part 4b of the Civil Air Regulations and Part 25 of the Federal Aviations Regulations.

A-814

Vickers Armstrong 745D Description of Type Design Change:

Installation of Lockheed Aircraft Service Model 109-C Flight Data Recorder per Capital Airlines Engineering Project 3-EP-196.

Installation of Lockheed Aircraft Service, Inc. Type 109C (P/N 4001550-0505 C/R) Flight Recorder per United Air Lines Drawing List dated March 3, 1967, revised March 10, 1967.

Limitations and Conditions: This STC is applicable only to United Air Lines’ Vickers Armstrong Viscount Model 745D aircraft. 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.

This certificate and the supporting data, which is the basis for approval, shall remain in effect until surrendered, suspended, revoked or a termination date is otherwise established by the Administrator of the Federal Aviation Administration.

Date of application: April 10, 1961

Date of issuance: May 25, 1961

Date reissued: November 30, 2011

Date amended: March 10, 1967

( Signature) Timothy Hadsall Acting Manager New York Aircraft Certification Office

( Title)

NOTE:

**DO NOT DELETE THIS PAGE.**

**DO NOT ADD ANY DATA TO THIS PAGE.**

**THIS PAGE IS FOR PAGE NUMBERING PURPOSES, PLEASE DISCARD PRINTED COPY.**

## Every issue (2)

- November 30, 2011: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/a4/41/a441b88cc962cb1dca04b34a32c7f298b16c836ffd89c0daa610db1f4b72c222)
- March 10, 1967: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/ff/67/ff67ff46ab4752a05055a142398b20cf3c2f1ee46680e02ec30f91daf9eb7f57)

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