# STC SA3054WE

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Northrop Grumman Systems Corporation, United States
- Description: Installation of dual Litton LTN-72 Inertial Navigation System
- Applied: November 6, 1974
- Status date: April 12, 2016
- Product: Aircraft, Large Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A3WE](https://openairdocs.org/tcds/A3WE)
- Certificate PDF: https://openairdocs.org/files/sha256/6c/58/6c58968a0e2dd37e7207961de29037f8c6ff767699a73c6d754b0cb74c8e23d6
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/F062D188E355037786257FA2006B10F2.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3054WE

## 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

Read from the PDF's text layer, without the form's printed wording; the layout is lost and the order can differ. The PDF is the record.

United States Of America Department of Transportation - Federal Aviation Administration Supplemental Type Certificate The original certificate is reported as lost.

FAA Form 8110-2(10-68) Page 1 of 2 Number SA3054WE This Certificate issued to Northrop Grumman Systems Corporation 21240 Burbank Blvd.

Woodland Hills, CA 91367-6675

Part 4b of the Civil Air Regulations.

A3WE

Boeing

727-200 Series Description of Type Design Change : Installation of dual Litton LTN-72 Inertial Navigation System in accordance with FAA sealed Litton Top Installation Drawing No. 454011-02, Rev. “C”, or later FAA sealed revision. Litton Airplane Flight Manual Supplement to Boeing 727-200 Series, FAA Approved on June 22, 1976 or later FAA approved revision, is required for this medication.

Limitations and Conditions: The approval of this change in type design applies basically to Boeing 727-200 Series airplanes only. This approval should not be extended to other aircraft of t hese models on which other previously approved modifications are incorporated unless it is determined by the installer that the interrelationship between this change and any of those other previously approved modifications will introduce no adverse effect upon the airworthiness of that aircraft. A copy of this certificate must be maintained as part of the permanent records for the modified aircraft. If the holder agrees to permit another person to use this certificate to alter the product, the holder shal l give the other person written evidence of that permission.

Date of application: November 6, 1974

Date of issuance: July 3, 1975

Date reissued: April 12, 2016

Date amended: June 22, 1976

(Signature) Supervisor, Technical & Administrative Support Staff Los Angeles Aircraft Certification Office (Title)

NOTE:

**DO NOT DELETE THIS PAGE.**

**DO NOT ADD ANY DATA TO THIS PAGE.**

**THIS PAGE IS FOR PAGE NUMBERING PURPOSES, PLEASE DISCARD PRINTED COPY.**

## Every issue (1)

- April 12, 2016: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/6c/58/6c58968a0e2dd37e7207961de29037f8c6ff767699a73c6d754b0cb74c8e23d6)

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