# STC SA2765WE

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Northwest Airlines, Inc., United States
- Description: Installation of Harowe P/N 2031-01-1 altitude alert system.
- Applied: August 31, 1973
- Status date: November 14, 1986
- Product: Aircraft, Large Airplane
- Data sheets: [TCDS A6WE](https://openairdocs.org/tcds/A6WE)
- Certificate PDF: https://openairdocs.org/files/sha256/d1/8b/d18b3f7da2f2c8663585bf5b6339d4156a19ad4cc5d7e2aad902f5cb52c5849f
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/A74A4CEC4674A0A985256CC20008C8B0.0001
- DRS record last changed: August 13, 2026
- Page: https://openairdocs.org/stc/SA2765WE

## ADs that name it (0)

None.

## Approved models (3)

- McDonnell Douglas Corporation DC-9-14 ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))
- McDonnell Douglas Corporation DC-9-31 ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))
- McDonnell Douglas Corporation DC-9-32 ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))

## 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 Number: SA2765WE This certificate issued to: Northwest Airlines, Inc.

2700 Lone Oak Parkway Eagan, MN 55124 Part 4D of the CIVIl Air Regulations. (See T.C. Data Sheet AGWE) Original Product - Typebertificate Number: AGWE Make: McDonnell Douglas Model: DC-9-14, DC-9-31, DC-9-32 Description of Type Design Change:

Altitude Alerting and reporting capabilities are provided by the installation of a Harowe P/N 2031-01-1 Altitude Alert System and replacement of the Captain's Barometric Altimeter with a Harowe P/N 2050-01-1 servo actuated altimeter, in accordance with FAA sealed Hughes Airwest ECO 34-17-07.

This approval is limited to those aircraft with serial numbers listed in ECO 34-17-07.

Date of Application: AuguSt 31, 1973 Date Reissued: October 13, 1982 November 14, 1986 Date of Issuance: October 10, 1973 Date Amended:

FEDERAL AVIATION Buy divedict they Administrater W. F. Horn ( Signature) TO MINISTRATION Manager, Chicago Aircraft Certification Office, ACE-115C, Central Region, FAA (Title) 47 FAA FORM 8110-2 (10-68)

## Every issue (1)

- November 14, 1986: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/d1/8b/d18b3f7da2f2c8663585bf5b6339d4156a19ad4cc5d7e2aad902f5cb52c5849f)

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