# STC SA2582WE

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Northrop Grumman Systems Corporation, United States
- Description: Installation of Litton Systems, Inc. LTN-72 Inertial Navigation System installed in the number two position and two LTN-51inertial navigation systems
- Applied: June 22, 1972
- Status date: April 12, 2016
- Product: Aircraft, Large Airplane
- Certification basis: Part 21
- Data sheets: [TCDS 4A25](https://openairdocs.org/tcds/4A25)
- Certificate PDF: https://openairdocs.org/files/sha256/4f/42/4f4243b7c0b50d5660f9ecfc7884b256a824f2eac3f350e06b971fe4210b6716
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/AFD02A1BBF3F2F5786257FA1006B82A4.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA2582WE

## ADs that name it (0)

None.

## Approved models (1)

- The Boeing Company DC-8-63F ([TCDS 4A25](https://openairdocs.org/tcds/4A25))

## 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.

FAA Form 8110-2(10-68) Page 1 of 2 Number SA2582WE This Certificate issued to Northrop Grumman Systems Corporation 21240 Burbank Blvd.

Woodland Hills, CA 91367-6675 Part 4b of the Civil Air Regulations.

Dated 31 December 1953 (See Type Certificate Data Sheet No. 4A25).

4A25

McDonnell Douglas Corporation

DC-8-63F Description of Type Design Change : Installation of Litton Systems, Inc. LTN-72 Inertial Navigation System installed in the number two position and two LTN-51inertial navigation systems in accordance with FAA sealed Litton Drawing Number 678278- 07 and FAA approved Litton Systems, Inc. Airplane Flight Manual Supplement to DACO Report 33163 dated 28 October 1970, as modified by the placards shown on FAA sealed Litton Drawing Number 452848.

Limitations and Conditions : The LTN-72 Inertial Navigation System is an optional installation and is not approved as a sole means of navigation. The following placards must be installed on the indicated units:

Control Display Unit: “ NOT FOR USE AS SOLE MEANS OF NAVIGATION” Mode Selector Unit: “FOR FLIGHT EVAL. ONLY” INS Selector Switch: “INS 2 FOR FLIGHT EVAL. ONLY” This approval should not be extended to other aircraft of these models on which other pre viously 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 shall give the other person written evidence of that permission.

Date of application: June 22, 1972

Date of issuance: August 4, 1972

Date reissued: April 12, 2016

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

NOTE:

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## Every issue (1)

- April 12, 2016: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/4f/42/4f4243b7c0b50d5660f9ecfc7884b256a824f2eac3f350e06b971fe4210b6716)

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