# STC ST04474AT - Type: Supplemental type certificate - Status: Current, Issued - Holder: LB Aircraft Engineering Inc, United States - Description: Installation of Landing System Sensor Units (GLSSU), dual CMA-5025 GPS Landing System (GLS) Control Panels, dual low profile high-speed WAAS GPS/SBAS/GNSSU antennas, LPV/LP Level of Service annunciator lights and ILS/DME-ILS/SLS switch lights - Applied: July 8, 2019 - Status date: April 8, 2020 - Product: Aircraft, Large Airplane - Certification basis: Part 21, Part 25, Part 26, Part 36 - Data sheets: [TCDS A16WE](https://openairdocs.org/tcds/A16WE) - Certificate PDF: https://openairdocs.org/files/sha256/01/d5/01d510af13b0ba61d0d0ea60d609cc1898b1c66614da1ab5beb8a34378609221 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/73EF1C63ADA0D847862585D9003F9378.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/ST04474AT ## ADs that name it (0) None. ## Approved models (3) - The Boeing Company 737-300 Series ([TCDS A16WE](https://openairdocs.org/tcds/A16WE)) - The Boeing Company 737-400 Series ([TCDS A16WE](https://openairdocs.org/tcds/A16WE)) - The Boeing Company 737-500 Series ([TCDS A16WE](https://openairdocs.org/tcds/A16WE)) ## 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. United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Possession of this Su pplemental Type Certificate (STC) document by persons other than the STC holder does not constitute rights to the design data nor to alter an aircraft, aircraft engine, or propeller. The STC’s supporting documentation (drawings, instructions, specifications, flight manual supplements, etc.) is th e property of the STC holder. FAA Form 8110-2 (5/14) Page 1 of 3 Number: ST04474AT This certificate issued to: LB Aircraft Engineering, Inc. 6355 NW 36th St, Suite 510 Miami, Florida 33166 Part 25 of the Federal Aviation Regulations. Original Product – Type Certificate Number: A16WE Make: Boeing Model: 737-300/-400/-500 Series Description of Type Design Change: Installation of Esterline CMC Electronics dual CMA-6024 GPS/SBAS Landing System Sensor Units (GLSSU), dual CMA-5025 GPS Landing System (GLS) Control Panels, dual low profile high-speed WAAS GPS/SBAS/GNSSU antennas (CMC Electronics 201-990309-187 or Aero Antenna Technology AT575-234W-TNCF-000-RG- 29.5-NM), LPV/LP Level of Service annunciator lights and ILS/DME-ILS/SLS switch lights. For aircraft with a single Smith FMC system, a second Smith Industries FMC No. 2 P/N 171497-05-01 is installed with operator specific Boeing provided Operational Program Configuration (OPC) with GPS update and Operational Program Software (OPS) level U12.0 or higher. The dual CMA-6024 Satellite Based Augmentation System (SBAS) is an independent system that allows the aircraft to perform LP and LPV approaches. The CMA-6024 provides high integrity GPS position updates to the aircraft Flight Management System & Inertial Reference System in all phases of flights and may serve as GPS source for ADS-B Out transponders. This modification will be in accordance with LB Aircraft Engineering LLC. Master Data List LB-GLS.737-MDL Revision G, dated March 6, 2020, or later FAA approved revisions. Limitations and Conditions: " Both FMCs must be loaded with operator specific Boeing provided OPC software with GPS update recognition. FAA Approved Flight Manual Supplement, LB Aircraft Engineering document LB-GLS.737-AFMS, Rev IR, dated April 3, 2020, or later FAA approved revisions, is a required part of this STC. For maintenance and inspections, apply LB Aircraft Engineering Instructions for Continued Airworthiness LB-GLS.737-ICA, Revision B, dated March 1st, 2020, or later approved revisions…” (See continuation sheet 3 of 3) Date of Application: July 8, 2019 Date Reissued: Date of Issuance: April 8, 2020 Date Amended: Signature Title (for) Christina M. Underwood Manager, Atlanta ACO Branch FAA Form 8110-2 (5/14) Page 2 of 3 Transfer the ownership of Supplemental Type Certificate Number: ST04474AT To (Name and address of transferee) From (Name and address of grantor) United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: ST04474AT FAA Form 8110-2 (5/14) Page 3 of 3 Date of Issuance: April 8, 2020 Date Reissued: Limitations and Conditions (Continued): " This approval should not be extended to other aircraft 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 other previously approved modifications, will produce 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.” 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 the Boeing B737 Series is as follows: a. The type certification basis for Boeing 737-300/-400/-500 series airplanes is shown on TCDS A16WE for parts not changed or affected by the change. b. The certification basis for parts changed or affected by the change since the reference date of application, July 8, 2019, is based upon 14 CFR Part 25 as amended by Amendment 25-145. Based on Order 8110.48, the certification basis for this modification was determined to be: Regulations at the latest amendment than 25-0 thru 25-145: §25.23(a), Orig. §25.301(a)(b), Amdt. 25-23 §25.303, Amdt. 25-23 §25.305(a)(b), Amdt. 25-86 §25.307(a), Amdt. 25-139 §25.365(a)(b)(d), Amdt. 25-54 §25.561(b)(3), Amdt. 25-23 §25.562(c)(5), Amdt. 25-64 §25.571(a)(b), Amdt. 25-45 §25.581(a)(b)(c), Amdt. 25-23 §25.601, Orig. §25.603(a)(b), Amdt. 25-46 §25.605(a), Amdt. 25-46 §25.609(a), Orig. §25.611(b), Amdt. 25-123 §25.613(a)(b), Amdt. 25-112 §25.625(a)(b)(c), Amdt. 25-72 §25.771(a)(c), Amdt. 25-4 §25.773(a), Amdt. 25-46 §25.777(a)(b)(c)(g), Amdt. 25-46 §25.789(a), Amdt. 25-46 §25.869(a)(3), Amdt. 25-123 §25.1301, Amdt. 25-123 §25.1307(b)(c)(e), Amdt. 25-46 §25.1309(a)(b)(c)(d)(g), Amdt. 25-41 §25.1316(a)(b), Amdt. 25-134 §25.1317(a)(b)(c), Amdt. 25-122 §25.1321(a)(e), Amdt. 25-41 §25.1322(b)(c)(d), Amdt. 25-38 §25.1329(h), Amdt. 25-46 §25.1351(a)(1), Amdt. 25-72 §25.1353(a), Amdt. 25-42 §25.1355, Amdt. 25-38 §25.1357 (a)(b)(c)(d)(e), Orig. §25.1363 (b), Orig. §25.1381(a)(b), Orig. §25.1431(a)(c), Orig. §25.1501 (a)(b), Amdt. 25-42 §25.1519, Orig. §25.1523, Orig. §25.1529, Amdt. 25-54 §25.1541(a)(b), Orig. §25.1555(a), Orig. §25.1581(a)(2)(d), Amdt 25-42 §25.1585(a), Amdt. 25-46 14 CFR Part 36 regulations: Based on 14 CFR §§ 21.93(b)(1) (Amd 21-97), No Acoustical Change has been found for the 14 CFR Part 36 noise levels regulations. 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 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(c) (Amdt 26-0) and §§ 26.47(b)(c) (Amdt. 26-1). --------------------------END--------------------------- ## Every issue (1) - April 8, 2020: Issued, Current. [certificate](https://openairdocs.org/files/sha256/01/d5/01d510af13b0ba61d0d0ea60d609cc1898b1c66614da1ab5beb8a34378609221) --- 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.