STC ST09927SC

FAA Form 8110-2 (03/21) SUPERSEDES PREVIOUS EDITION Page 1 of __ United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: ST09927SC This certificate issued to:

Part of .

L2 Consulting Services, Inc.

2100-A E Hwy 290 Dripping Springs, TX 78620 A16WE The Boeing Company 737-700/-800/-900/-900ER Series, 737-8, 737-9Description of Type Design Change:

Installation of a Gables Audio Management System in accordance with L2 Consulting Services, Inc., Master Data List 2351-B130-MDL, Revision B, dated March 10, 2022, or later FAA approved revision. Airplane Flight Manual Supplement 2351-B130-AFMS-01, Revision IR

dated March 30, 2022, or 2351-B130-AFMS-02, Revision IR dated March 30, 2022, or later FAA appoved revision is required.

September 13, 2021 April 11, 2022 S. Frances Cox Acting Manager, Fort Worth ACO Branch Compliance & Airworthiness Division Aircraft Certification Service

3 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.

25 the Federal Aviation Regulations.

FAA Form 8110-2 (03/21) SUPERSEDES PREVIOUS EDITION Page 2 of ___ United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number:

ST09927SC 3

FAA Form 8110-2 (3/21) United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number:

Limitations and Conditions (continued) ST09927SC Instructions for Continued Airworthiness (ICA), L2 Consulting Services, Inc. Document 2351- B130-ICA-01, Rev. IR, Dated March 4, 2022, or 2351-B130-ICA-02, Rev. IR, Dated March 10, 2022, or later FAA accepted revision must be made available to the operator at the time of installation.

Note: The FAA has reviewed the applicant's assessment showing that this modification does not impact the existing electrical wiring interconnection system Instructions for Continued Airworthiness (EWIS ICA) and found that no additional EWIS ICA tasks are required.

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 for this modification was determined to be: Regulations per Type Certificate Data Sheet A16WE (amendments 25-1 through 25-141, plus exceptions in the TCDS):

14 CFR 25.29 (a); 25.301 (a); 25.303; 25.305 (a), (b); 25.307 (a); 25.561 (a), (b); 25.601;

25.603; 25.605 (a); 25.609 (a); 25.611; 25.613 (a), (b), (c); 25.771 (a); 25.789 (a); 25.1301 (a);

25.1309 (b), (c), (d), (e); 25.1322; 25.1351 (a); 25.1353 (a), (c); 25.1355 (a), (c); 25.1357(a),

(c), (e); 25.1381 (a), (b); 25.1431 (a), (b), (c), (d); 25.1519; 25.1529; 25.1541 (b); 25.1581;

25.1583 (c)(1); 25.1585 (a), (b) Regulations at an intermediate amendment Regulations at amendment 25-125: 25.981 (a)(3), (d) Regulations at amendment 25-136: 25.773 (a)(2) 14 CFR Part 26 regulations Based on 14 CFR § 21.101(g), applicable provisions of 14 CFR part 26 are included in the certification basis. For any future 14 CFR part 26 amendments, the holder of this STC must demonstrate compliance with the applicable sections. As of the issuance date of this STC, compliance has been found for the following regulations 14 CFR § 26.11 - amendment 26-0 ------------------------------------------------ END ---------------------------------------- Page 3 of 3