# STC SA8018NM

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Northrop Grumman Systems Corporation, United States
- Description: Replacement of three (3) Inertial Navigation Units (INUs) P/N 463001-6110-0412 (software P/N 92-04-12)
- Applied: June 9, 1994
- Status date: February 22, 2016
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21, Part 25
- Data sheets: [TCDS A20WE](https://openairdocs.org/tcds/A20WE)
- Certificate PDF: https://openairdocs.org/files/sha256/6d/d4/6dd4721a676c84a823338d9eb4e8fcc4fd85c24a972cb767c85055337b0d661e
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FE62157D3BE62BC486257F6B00662DF5.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA8018NM

## ADs that name it (0)

None.

## Approved models (1)

- The Boeing Company 747-300 Series ([TCDS A20WE](https://openairdocs.org/tcds/A20WE))

## 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.

This Certificate issued to Northrop Grumman Systems Corporation 21240 Burbank Blvd.

Woodland Hills, CA 91367-6675 Part 25* of the Federal Aviation Regulations.

(For Certification Basis see T. C. Data Sheet No. A22WE.)

A22WE

The Boeing Company

747-300 Series Description of Type Design Change: Replacement of three (3) Inertial Navigation Units (INUs) P/N 463001- 6110-0412 (software P/N 92-04-12) in accordance with FAA approved Litton Top Installation Drawing 454065-08, Revision N/C, dated June 9, 1994, or later FAA approved revision of this drawing.

Litton Airplane Flight Manual Supplement, Document No. 464089, Revision N/C, FAA approved on August 8, 1994, or later FAA approved revision, is required as part of this modification.

Limitations and Conditions: This approval should not be extended to other aircraft of this model on which other approved previously approved modifications are incorporated unless it is found by the installer that the interrelationship between this change and any of those previously approved modifications will introduce no adverse effect upon the airworthiness of the 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 9, 1994

Date of issuance : August 23, 1994

Date reissued : March 30, 2015, February 22, 2016

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

## Every issue (3)

- February 22, 2016: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/6d/d4/6dd4721a676c84a823338d9eb4e8fcc4fd85c24a972cb767c85055337b0d661e)
- March 30, 2015: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/3a/ed/3aed18632b44f810844f745443e1daf8a568d88ca02ed7b643618ac89e205560)
- March 8, 1995: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/7c/33/7c332d28988536c4cf9f5318a8cdc36a31178b0b49d9a7c66ce76c74e3be378c)

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