# STC SA1637WE

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Lockheed Martin Aeronautics Company, United States
- Description: Installation of cargo door approximately 80 inches high by 144 inches long in left side of fuselage forebody.
- Applied: June 29, 1967
- Status date: April 26, 2004
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 4A22](https://openairdocs.org/tcds/4A22)
- Certificate PDF: https://openairdocs.org/files/sha256/1f/e5/1fe53749d6086ec708a000dba2047c64a6992c2bf30c38fed582763b0610c859
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/8B436BFBB72D193986256F3A00674DC2.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA1637WE

## ADs that name it (0)

None.

## Approved models (1)

- Lockheed Aircraft Corporation 188C ([TCDS 4A22](https://openairdocs.org/tcds/4A22))

## 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.

Number SA1637WE

This Certificate issued to Lockheed Martin Aeronautics Company 36 South Cobb Drive Marietta, Georgia 30063 Part 4b of the Civil Air Regulations.

4A22 Lockheed 188C Description of Type Design Change: Installation of a cargo door approximately 80 inches high by 144 inches long in the left side of the fuselage forebody in accordance with FAA approved, sealed LAS Drawing List SDR 6707, including cargo floor installation, various optional interior arrangements, and other modifications associated with the cargo door installation.

Limitations and Conditions: Lockheed Aircraft Service Company FAA approved L188C Airplane Flight Manual supplement dated March 31, 1968 and subsequent revisions thereto is required.

The smoke evacuation door #4035340 is limited to a service life of 28,000 flights as indicated in the Limitations Section of the FAA Approved Airplane flight Manual. This limitation may not be changed without FAA engineering approval. 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 : June 29, 1967

Date of issuance : March 31, 1968

Date reissued : Nov. 2, 1999, Mar 16, 2001, Mar 15, 2004, Apr. 26, 2004

( Signature) Manager, Technical & Administrative Support Staff, Los Angeles Aircraft Certification Office ( Title)

Number (STC No.)

## Every issue (1)

- April 26, 2004: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/1f/e5/1fe53749d6086ec708a000dba2047c64a6992c2bf30c38fed582763b0610c859)

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