# STC SA4-1042

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Northwest Airlines Inc., United States
- Description: Passenger seating capacity increased to 44.
- Applied: January 20, 1960
- Status date: November 14, 1986
- Product: Aircraft, Large Airplane
- Data sheets: [TCDS 1A7](https://openairdocs.org/tcds/1A7)
- Certificate PDF: https://openairdocs.org/files/sha256/10/75/1075c57763be4d2a9afef39f5c80c4b22cecd2128b01422448e1e0fb0de72692
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID175311106820260715184008.0001
- DRS record last changed: July 15, 2026
- Page: https://openairdocs.org/stc/SA4-1042

## 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: SA4-1042 This certificate issued to: - Northwest Airlines, Inc.

2700 Lone Oak Parkway Eagan, MN 55124 Purl AB ofithe Eivil Air Regulations and FAR 25.729(e) (4) Original Product -IypoGerlificate Number: 1A7 Make: Martin Model: 404 Description of Type Design Change:

Provisions for increasing passenger seating capacity from 40 to 44 passengers by accomplishing the following:

1) Movement of passenger compartment forward bulkhead from Stations 330 to 290.

2) Installation of additional cabin window between Stations 311.5 and 333.375.

3) Relocation of radio and electrical equipment on existing radio rack.

4) Installation of additional row of seats.

5) Installation of aft buffet.

Findindance unditund: 116 & 117 and Dvg No. 1255, 1262 and 1264.

The approval of this change in Type Design applies basically to standard Martin 404 airplanes 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 inter-relationship between this change and any of those other previously approved modifications will introduce no adverse effect upon the airworthiness of that airplane.

ногп (Signature ) TO ISTRAIOA Manager, Chicago Aircraft Certification Office, ACE-115C, Central Region, FAA (Title)

**FAA FOR 8110-2 (10-68)**

## Every issue (1)

- November 14, 1986: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/10/75/1075c57763be4d2a9afef39f5c80c4b22cecd2128b01422448e1e0fb0de72692)

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