# STC ST12424CH - Type: Supplemental type certificate - Status: Current, Issued - Holder: Astronics Connectivity Systems and Certification Corp., United States - Description: Installation of NGAS Provisions Installation - Applied: February 19, 2025 - Status date: July 7, 2026 - Product: Aircraft, Large Airplane - Certification basis: Part 25 - Data sheets: [TCDS A16WE](https://openairdocs.org/tcds/A16WE) - Certificate PDF: https://openairdocs.org/files/sha256/59/87/5987da0168481730a1be3e6260fe25449ffab52565b95addfec4fb2ae9049c18 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID188315686620260807142412.0001 - DRS record last changed: August 7, 2026 - Page: https://openairdocs.org/stc/ST12424CH ## ADs that name it (0) None. ## Approved models (1) - The Boeing Company 737-900ER 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. Number: ST12424CH Part 25 of the Federal Aviation Regulations. Original Product Type Certificate Number: A16WE Make: Boeing Model: 737-900ER Series Date of Application: February 19, 2025 Date Reissued: Date of Issuance: July 07, 2026 Date Amended: Brenda L. Litchfield ODA Administrator Title: Envoy Aerospace, LLC ODA-831240-CE Astronics Connectivity Systems and Certification Corp. 804 S. Northpoint Blvd. Waukegan IL 60085 1) This STC is applicable to all serial numbers for this Make-Model. 2) The installer must determine whether this design change is compatible with previously approved modifications. 3) FAA Approved Airplane Flight Manual Supplement, Astronics Connectivity Systems and Certification Corp. Doc. No. DC303-141979-00, Revision -, approved July 07, 2026, or later FAA approved revision is required on board the modified aircraft. 4) FAA Approved Instructions for Continued Airworthiness – Airworthiness Limitations, Section 2 of Astronics Connectivity Systems and Certification Corp. Doc. No. DC113-141979-00, Revision B, approved July 07, 2026, or later FAA approved revision is a required part of this STC. 5) If the holder agrees to permit another person to use this certificate to alter a product, the holder must give the other person written evidence of that permission. Installation of NGAS Provisions Installation in accordance with Astronics Connectivity Systems and Certification Corp. Master Data List, Doc. No. DC104-141979-00, Revision C, dated July 6, 2026, or later FAA-approved revisions. Number: ST12424CH (Continuation Sheet) Number: ST12424CH Date of Issuance: July 07, 2026 Certification Basis: Based on 14 CFR §§ 21.115 and 21.101, and the FAA policy for design changes that are identified as not significant in FAA Order 8110.48A, the certification basis for the Boeing 737-900ER Series aircraft is as follows: a. The type certification basis for the Boeing 737-900ER Series aircraft is shown on TCDS A16WE for parts not changed or affected by the change. b. This certification basis for parts changed or affected by the change since the reference date of application is based upon 14 CFR Part 25 as amended by Amendment 25-108 and as further defined on TCDS A16WE as follows: Applicable regulations at amendment shown on TCDS A16WE § 25.29(a)(b) § 25.301(a)(b) § 25.303 § 25.305(a)(b) § 25.307(a) § 25.365(a)(b)(c)(d) § 25.561(a)(b)(c) § 25.571(a)(b) § 25.581(a)(b)(c) § 25.601 § 25.603(a)(b)(c) § 25.605(a) § 25.609(a)(b) § 25.611 § 25.613(a)(b)(c)(d) § 25.619(a)(b)(c) § 25.625(a) § 25.869(a)(4) § 25.1301(a)(b)(c)(d) § 25.1307(c) § 25.1309(a)(b)(d)(g) § 25.1325(b) § 25.1351(a) § 25.1353(a)(b) § 25.1357(a)(c) § 25.1419 (a) § 25.1431(a)(b)(c) § 25.1438(c) § 25.1501(a)(b) § 25.1529 § 25.1581(a)(b)(d) Applicable 14 CFR Part 25 regulations at other amendment levels § 25.981(a)(3) [Amdt 25-102]; § 25.853(a) [Amdt 25-116]. Applicable 14 CFR Part 26 regulations at the latest amendment 26-0 through 26-1 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 latest amendment date of this STC, compliance has been found for the following regulations: 14 CFR § 26.11(c) [Amdt. No. 26-7]; § 26.47(c) [Amdt. No. 26-7]. -----END----- ## Every issue (1) - July 7, 2026: Issued, Current. [certificate](https://openairdocs.org/files/sha256/59/87/5987da0168481730a1be3e6260fe25449ffab52565b95addfec4fb2ae9049c18) --- 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.