# STC SA3344WE - Type: Supplemental type certificate - Status: Current, Reissued - Holder: Northrop Grumman Systems Corporation, United States - Description: Installation of dual Litton LTN-72R INS/RNAV Navigation Systems - Applied: June 14, 1976 - Status date: April 12, 2016 - Product: Aircraft, Large Airplane - Certification basis: Part 1, Part 21, Part 25, Part 36 - Data sheets: [TCDS A22WE](https://openairdocs.org/tcds/A22WE) - Certificate PDF: https://openairdocs.org/files/sha256/b9/d8/b9d85332daf63c230c997d3ad66112b826043e45d87bdf4907f04c65cdcb195a - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/F980DC42C472E0E786257FA2006C4AE3.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA3344WE ## ADs that name it (0) None. ## Approved models (1) - The Boeing Company DC-10-30 ([TCDS A22WE](https://openairdocs.org/tcds/A22WE)) ## 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 3 Number SA3344WE 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 Continuation Sheet) Original Product Type Certificate Number : A22WE McDonnell Douglas DC-10-30 Description of Type Design Change: Installation of dual Litton LTN-72R INS/RNAV Navigation Systems in accordance with FAA sealed Litton Aero Products Top Installation Drawing Numbers 454050-04 “C” Revision dated February 1, 1977, or later sealed revision. Litton AFM Supplement dated February 23, 1977, or later approved revision is required with this modification. Limitations and Conditions: The approval of this change in type design applies basically to McDonnell Douglas Model DC-10-30 airplanes only. This approval should not be extended to other aircraft of these 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 previ ously 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. (See continuation page 3) Date of application: June 14, 1976 Date of issuance: February 23, 1977 Date reissued: April 12, 2016 (Signature) Supervisor, Technical & Administrative Support Staff Los Angeles Aircraft Certification Office (Title) Number SA3344WE Certification Issuance of a Type Certificate is based upon compliance Basis with the following: (1) FAR Part 1. “Definition and Abbreviations.” (2) FAR Part 21. “Certification Procedures for Products and Parts.” (3) FAR 25, dated 1 F3ebruary 1965, with Amendments 1 thru 22. “Airworthiness Standards: Transport Category Airplanes,” and FAR Part 25.471 of Amendment 25-23. (4) FAR Part 36 “Noise Standards: Aircraft type Certification.” (5) Special condition No. 25-18-WE-7 dated 7 January 1970, and Special conditions No. 25-18-WE-7, amendment No. 1 dated 9 July 1971. (See NOTE 7). (6) Special condition No. 25-46-WE-14 dated 26 October 1972. For RNAV IFR operation, at least the #1 or the #2 VHF NAV shall be an ARINC 579 receiver, and the error of the VOR receivers supplying the LTN-72R must not exceed + 2- 1/2 degrees. ------------------------------------END----------------------------------------- ## Every issue (1) - April 12, 2016: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/b9/d8/b9d85332daf63c230c997d3ad66112b826043e45d87bdf4907f04c65cdcb195a) --- 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.