# STC SA4-1453

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Northwest Airlines, Inc., United States
- Description: Cabin air-conditioning system modification.
- Applied: March 27, 1961
- Status date: November 14, 1986
- Product: Aircraft, Large Airplane
- Data sheets: [TCDS 7A1](https://openairdocs.org/tcds/7A1)
- Certificate PDF: https://openairdocs.org/files/sha256/5f/21/5f21bbfd66107bbca49504fdafb082326ab59b19439e78f5421128511daa52dd
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID183346925120260717174450.0001
- DRS record last changed: July 17, 2026
- Page: https://openairdocs.org/stc/SA4-1453

## ADs that name it (0)

None.

## Approved models (1)

- Fairchild Industries Inc. F27-A ([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 LOST ORIGINAL.

Number: SA4-1453 This certificate issued to: Northwest Airlines, Inc.

2700 Lone Oak Parkway Eagen, MN 55124 Purt 4B of the CIVIT Air Regulations.

Original Product Type berlificate Number: 7A1 Make: Fairchild Mertel: F-27 A Description of Type Design Change:

Modification of the Cabin Air Conditioning System per Bonanza Air Lines Engineering Change Order No. F-134.

The approval of this change in type design applies basically to Fairchild F-27A of this model on which other previously approved modifications are incorporated, aircraft only. This approval should not be extended to other specific airplanes unless it is determined that the inter-relationshiop 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: March 27, 1961 Date Reissued: October 13, 1982 Pale fissuunce: March 29, 1961 Late urrended: November 14, 1986

FEDERAL AVIATION OMINISTRAIO Manager, C w. T. ACE-115C, Central Region, FAA Chicago Aircraft Certification Office, (Signature ) (Tille ) or both.

FAA FORM 8110-2 (10-68) This certificate may be transferred in accordance with FAR 21.4.

## Every issue (1)

- November 14, 1986: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/5f/21/5f21bbfd66107bbca49504fdafb082326ab59b19439e78f5421128511daa52dd)

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