# STC SA4-1209

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Northwest Airlines, Inc, United States
- Description: Cabin air-conditioning modification and addition of inflight cabin air recirculation.
- Applied: July 29, 1960
- Status date: November 14, 1986
- Product: Aircraft, Large Airplane
- Data sheets: [TCDS 7A1](https://openairdocs.org/tcds/7A1)
- Certificate PDF: https://openairdocs.org/files/sha256/c3/e3/c3e3798a950b6ae9dd7f9d7f5b3eb3a5b6411721be3778878184c7b8acf39c2a
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID102397093720260715184212.0001
- DRS record last changed: July 15, 2026
- Page: https://openairdocs.org/stc/SA4-1209

## ADs that name it (0)

None.

## Approved models (1)

- Fairchild Industries Inc. F27 Series ([TCDS 7A1](https://openairdocs.org/tcds/7A1))

## 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: SA4-1209 This certificate issued to: Northwest Airlines, Inc.

2700 Lone Oak Parkway Eagan, MN 55124 Certifies that the change in the type design for the fillowing preduch with the limitations and condilions thorefor as specified hereon meets the w urschinesssequirementsef Purl 4B of the CiVil Air Regulations.

Original Product - Type Certificate Number: 7A1 Make: Fairchild Mertel: F-27 asiplin Come Liong Megification - Addition of Inflight Cabin Air Recirculation.

In accordance with West Coast Airlines' drawings F-27-2101 (sheets 1 and 2), F-27-2102, and F-27-2103.

The approval of this change in Type Design applies basically to Standard Fairchild F-27 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.

F. Horn (Signature ) TOMINISTRATO Manager Chicago Aircraft Certification Office, ACE-115, Central Region, FAA (Title) or both.

## Every issue (1)

- November 14, 1986: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/c3/e3/c3e3798a950b6ae9dd7f9d7f5b3eb3a5b6411721be3778878184c7b8acf39c2a)

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