# STC SA1664WE

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Honeywell International Inc, United States
- Description: Installation of Sperry SP-40C auto flight control system and SPI-73B Sperry instrumentation system.
- Applied: December 1, 1967
- Status date: March 19, 2020
- Product: Aircraft, Large Airplane
- Certification basis: Part 21
- Data sheets: [TCDS 2A15](https://openairdocs.org/tcds/2A15)
- Certificate PDF: https://openairdocs.org/files/sha256/9f/de/9fdec054f69c5780b226af18dd727bd8ecab3f2cd4f761f5d8db34ab5c3867cf
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/2F1F1E43690111548625861B00650FB1.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA1664WE

## ADs that name it (0)

None.

## Approved models (3)

- Lockheed Aircraft Corporation 1329-23A ([TCDS 2A15](https://openairdocs.org/tcds/2A15))
- Lockheed Aircraft Corporation 1329-23D ([TCDS 2A15](https://openairdocs.org/tcds/2A15))
- Lockheed Aircraft Corporation 1329-23E ([TCDS 2A15](https://openairdocs.org/tcds/2A15))

## 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 Page 1 of 2 FAA Form 8110-2 (5/14)

Number: SA1664WE This certificate issued to: Honeywell International Inc.

21111N 19th Ave Phoenix, Arizona 85027 Part 4bof the Civil Aviation Regulations.

Original Product – Type Certificate Number: Make: Lockheed Model:

2A15 1329-23A, -23D, -23E

Installation of Sperry SP-40CAutomatic Flight Control System and SPI-73BSperry Instrumentation System in accordance with FAA sealed AiResearch Aviation Service Company Top Drawing No. IL 101-JS-318 (Category II Equipment and System approval).

This approval should not be extended to other specific aircraft of these models on which other previously approved modificationsare incorporated, unlessit isdetermined that the interrelationship between this change and any of those other previously approved modificationswill introduce no adverse effect upon the airworthinessof that 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.

Date of Application: December 1, 1967 January 30, 1986, April 9, 1987, January 6, 2009, Date Reissued: March 19, 2020 Date of Issuance: May 13, 1968

Signature

Title Richard B. Sleigh ODA Administrator, ODA-602216-NM

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Page 2 of 2 FAA Form 8110-2 (5/14)

To (Name and address of transferee)

From (Name and address of grantor)

## Every issue (2)

- March 19, 2020: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/9f/de/9fdec054f69c5780b226af18dd727bd8ecab3f2cd4f761f5d8db34ab5c3867cf)
- January 6, 2009: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/e0/e8/e0e84960875e58fe3009425a5e001976dfd00aca1c881bd624f9ff9468e40c35)

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