# STC SA2288CE - Type: Supplemental type certificate - Status: Current, Reissued - Holder: American Airlines Inc, United States - Description: Installation of dual Litton AHRS compass control units. - Applied: July 13, 1987 - Status date: October 14, 2008 - Product: Aircraft, Large Multi-Engine - Certification basis: Part 21, Part 25 - Data sheets: [TCDS A6WE](https://openairdocs.org/tcds/A6WE) - Certificate PDF: https://openairdocs.org/files/sha256/e6/91/e691a01046176017537ee32044a47cea7f519636ccab8b9690563ca5e2fe8575 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/7C7F9C887BD69FE7862575440080F6BB.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA2288CE ## ADs that name it (0) None. ## Approved models (1) - McDonnell Douglas Corporation DC-9-83 (MD-83) ([TCDS A6WE](https://openairdocs.org/tcds/A6WE)) ## 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: American Airlines, Inc. 3900 N. Mingo Road Tulsa, OK 74116 Part 25 of the Federal Aviation Regulations. Original Product - Type Certificate Number : A6WE Make : McDonnell Douglas Corporation Model : DC-9-83 Installation of dual Litton AHRS Compass Control Units in accordance with Trans World Airlines, Inc. Engineering Report No. 1775 dated September 18, 1987, or later FAA approved revision. Trans World Airlines, Inc. Airplane Flight Manual Supplement dated October 13, 1987, or later FAA approved revision, must be inserted in the FAA approved Airplane Flight Manual when the airplane is modified per this STC. 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 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 airplane. 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 reissued : October 14, 2008 Original signed by William Schinstock ( Signature) William Schinstock Associate ACO Manager, Airframe & Services Wichita Aircraft Certification Office (Title) Date of application : July 31, 1987 Date of issuance : October 13, 1987 ## Every issue (1) - October 14, 2008: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/e6/91/e691a01046176017537ee32044a47cea7f519636ccab8b9690563ca5e2fe8575) --- 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.