# STC SA2764WE

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Northwest Airlines, Inc, United States
- Description: Altitude alerting and reporting capabilities are provided by installation of Harowe P/N 2031-01-1 altitude alert system, replacement of captain's barometric altimeter with a Harowe P/N 2050-01-1 servo actuated altimeter and two existing air data computers are replaced by Sperry P/N 2587400-176 air data computer.
- 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/sha256/18/b5/18b5ed2e73c463a4c14113762f6c28f3e9b22346a0337b2175f7bc98a13093b0
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/1F5F5BB3091E974585256CC20008C8AD.0001
- DRS record last changed: August 13, 2026
- Page: https://openairdocs.org/stc/SA2764WE

## ADs that name it (0)

None.

## Approved models (1)

- McDonnell Douglas Corporation DC-9-15 ([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: SA276ANE This certificate issued to: Northwest Airlines, Inc. 2700 Lone Oak Parkway Eagan, MN 55124 Purt 4b of the CIVil Air Regulations: (See T.C. Data Sheet AGWE) Original Product - Type-bertificate Number: AGWE Make: McDonnell Douglas Model: DC-9-15 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, replacement of the Captain's Barometric Altimeter with a Harowe P/N 2050-01-1 servo actuated altimeter, and the two existing Air Data Computers are replaced by a Sperry P/N 2587400-176 Air Data Computer; all accomplished in accordance with FAA sealed Hughes Airwest ECO 34-17-10.

This approval is limited to those aircraft with serial numbers listed in ECO 34-17-10.

F. Horn (Signature) PAIN STRATE Manager, _Chicago Aircraft Certification Office, ACE-115C, Central Region, FAA (Title)

47.

## Every issue (1)

- November 14, 1986: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/18/b5/18b5ed2e73c463a4c14113762f6c28f3e9b22346a0337b2175f7bc98a13093b0)

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