# STC SA1122WE

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Northwest Airlines, Inc., United States
- Description: Installation of wing flap actuated landing gear aural warning system.
- Applied: June 30, 1965
- Status date: November 14, 1986
- Product: Aircraft, Large Airplane
- Data sheets: [TCDS 1A7](https://openairdocs.org/tcds/1A7)
- Certificate PDF: https://openairdocs.org/files/sha256/98/c7/98c778284a7909bbb9e305187b2cebff610ae7085e224224e9cc710dc8e70ea4
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID120222842920260803160424.0001
- DRS record last changed: August 3, 2026
- Page: https://openairdocs.org/stc/SA1122WE

## ADs that name it (0)

None.

## Approved models (1)

- Martin-Marietta Corporation 404 ([TCDS 1A7](https://openairdocs.org/tcds/1A7))

## What the certificate says

This is OCR from the scanned FAA certificate. OCR can misread letters and numbers.

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate REISSUED TO REPLACE ORIGINAL, WHICH WAS REPORTED LOST.

Number: SA1I22WE This certificate issued to: Northwest Airlines, Inc.

2700 Lone Oak Parkway Eagan, MN 55124 Certifies that the change in the type design for the folowing product with the limitations and conditions therforus specified herenmeets the airerthiness requirementa of Puri 4B of the CiVil Air Regulations: and FAR 25.729(e) (4) Original Product - Typebertificate Number: 1A7 Make: Martin Model: 404 Description of Type Design Change:

Installation of a wing flap actuated landing gear aural warning system in accordance with Federal Aviation Agency sealed Pacific Airlines E.O. 482 and Southern Airways, Inc. Drawings #32-163C (Rev. A, 2/8/65) and #32-164D (Rev. B, 3/1/65).

The approval of this change in Type Design applies to Martin Model 404 aircraft only. This approval should not be extended to other specific airplanes of this model on which other previously approved modifications are incorporated, unless it is determined that the interrelationship between this change and any of those other previously approved modifications will introduce no adverse effect upon the airworthiness of that airplane.

Date of Application: June 30, 1965 Date Reissued: OCTODer 1: November 14, 198€ 1982 Date of Issuance: December 20, 1965 Date Amended:

FEDERAL MUTATION Pan dirt a l he dadministrator W. F. Horn (Signature ) TRAINIS RAIS Manager, Chicago Aircraft Certification Office ACE-115C, Central Region, FAR (Title) 47 FAA For 8110-2 (10-68)

## Every issue (1)

- November 14, 1986: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/98/c7/98c778284a7909bbb9e305187b2cebff610ae7085e224224e9cc710dc8e70ea4)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.