# STC SA3380WE

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Northwest Airlines, Inc., United States
- Description: Installation of dual LTN-51, or dual LTN-72, or dual LTN-72R, or one LTN-51 and either one LTN-72 or one LTN-72R inertial navigation system. (727-2M7)
- Applied: March 22, 1979
- Status date: November 14, 1986
- Product: Aircraft, Large Airplane
- Data sheets: [TCDS A3WE](https://openairdocs.org/tcds/A3WE)
- Certificate PDF: https://openairdocs.org/files/sha256/8c/f5/8cf552e90f4d7f687b85dc1babd06a57bff2cdbf4b608cc8d4818a24def54fc3
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID183890056920260818142440.0001
- DRS record last changed: August 18, 2026
- Page: https://openairdocs.org/stc/SA3380WE

## ADs that name it (0)

None.

## Approved models (1)

- The Boeing Company 727-200 Series ([TCDS A3WE](https://openairdocs.org/tcds/A3WE))

## 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: SA3380NE This certificate issued to: Northwest Airlines, Inc.

2700 Lone Oak Parkway Eagan, MN 55124 Part 4b the Civil Air Regulations. (For certification basis see T.C. Data Sheet AWE) Original Product - Type Bertificate: Lumber: AWE Make: Boeing Model: 727-217 , or dual LTN-72, or dual LTN-72R, or one LIN-51 anc either one LTN-72 or one LTN-72R in accordance with FAA sealed Hughes Airwest Top Drawing RW3443002 Re. "C" or later FAA sealed revision.

Hughes Airwest Airplane Flight Manual Supplement No. 1 to Boeing AFM D6-8/28.2M/, FAA approved on June 12, 1979, or later FAA approved revision is required as part of this installation.

The approval of this change in type design applies basically to the above listed model 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.

Interf applicution: March 22, 1979 ule pissed: October 13, 1982, November 14, 1986 June 20, 1979 Jule anunded: September 5, 1979 FEDERAL AVIATION By digestroy of thef lemministrater April 29, 1980 W. F. Horn (Signature) MINIS FRAID Manager, Chicago Aircraft Certification Office, ACE-115C, Central Region, FAA (Title)

## Every issue (1)

- November 14, 1986: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/8c/f5/8cf552e90f4d7f687b85dc1babd06a57bff2cdbf4b608cc8d4818a24def54fc3)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.