STC SA04548AT

Title: (for) Christina M. UnderwoodManager, East Certification Branch Compliance and Airworthiness Division Aircraft Certification Service SA04548AT Aircraft Systems and Manufacturing, Inc.

1717 Universal City Boulevard Universal City, TX 78148 Part 23 the Federal Aviation Regulations.

See Approved Model List See Approved Model List See Approved Model List 221590-AML, Revision IR, dated Oct 4, 2022, or later FAA approved revisions Installation of an Avionica, LLC Quick Access Recorder/Data Concentrator model avRDC MAX (QAR) P/N 804-1250-32 and optional Avionica, LLC Cellular Module LTE (avCM LTE) P/N 650-0100-05, in accordance with Master Data List 221590-MDL, Revision A, dated September 16 2022 or later FAA approved revisions.

For maintenance and inspections, apply Archeion Holdings Instructions for Continued Airworthiness 221590-ICA, Revision IR, dated June 28, 2022, or later FAA approved revisions.

The installer must determine whether this design change is compatible with previously approved modifications. 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. (continued on Page 3) August 19, 2022 March 24, 2025 October 4, 2022 3

SA04548AT 3

SA04548AT Date Issued: October 4, 2022

Certification Basis: Based on 14 CFR § 21.115 and 21.101, and the FAA policy for significant changes in FAA Order 8110.48, the certification basis is as follows:

a. For parts not changed or affected by the change, the certification basis is shown on the TCDS listed in the FAA Approved Model List (AML).

b. The certification basis for this modification are the following regulations at the latest amendment 23-0 through 23-64:

14 CFR § 23.1529, 23.2100, 23.2210, 23.2230, 23.2235, 23.2250(a)(b)(c), 23.2255,

23.2505, 23.2510 3 3