# STC ST04621CH - Type: Supplemental type certificate - Status: Current, Issued - Holder: Envoy Aerospace LLC, USA - Description: Installation of an Interior Reconfiguration, Astronics AES In-Seat Power Supply System, and In-Flight Entertainment System Modifications - Applied: February 14, 2020 - Status date: August 26, 2023 - Product: Aircraft, Large Airplane - Certification basis: Part 25 - Data sheets: [TCDS A16WE](https://openairdocs.org/tcds/A16WE) - Certificate PDF: https://openairdocs.org/files/sha256/2c/f4/2cf45595b3083ffd52900ed0ec54d26069c554af6eabd0a713888233fb26d94f - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID173598349620230921152922.0001 - DRS record last changed: December 5, 2025 - Page: https://openairdocs.org/stc/ST04621CH ## ADs that name it (0) None. ## Approved models (1) - The Boeing Company 737-800 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: ST04621CH Part 25 of the Federal Aviation Regulations. Original Product Type Certificate Number: A16WE Make: Boeing Model: 737-800 Series Date of Application: February 14, 2020 Date Reissued: Date of Issuance: August 26, 2023 Date Amended: Brenda L. Litchfield ODA Administrator Title: Envoy Aerospace, LLC ODA-831240-CE Envoy Aerospace, LLC 75 Executive Drive, Suite 313 Aurora, IL 60504 Installation of an Interior Reconfiguration, Astronics AES In-Seat Power Supply System, and In-Flight Entertainment System Modifications in accordance with Envoy Aerospace Master Data List, Doc. No. E19035- 2500-L001, Revision A, dated August 24, 2023, or later FAA-approved revisions. 1) This STC is applicable to all serial numbers for this Make-Model-Series. 2) The installer must determine whether this design change is compatible with previously approved modifications. 3) FAA Approved Airplane Flight Manual Supplement, Envoy Aerospace Doc. No. E19035-2500-B007, Revision -, approved August 26, 2023, or later FAA approved revision is required on board the modified aircraft. 4) 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. Number: ST04621CH (Continuation Sheet) Number: ST04621CH Date of Issuance: August 26, 2023 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 737-800 Series aircraft is as follows: a. The type certification basis for the Boeing 737-800 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 TCDS A16WE. Based on 14 CFR 21.115 and 21.101, and the FAA policy for significant changes in Order 8110.48, the certification basis for this modification was determined to be: Applicable regulations at the latest amendment 25-0 through 25-119 § 25.29(a)(b) § 25.301(a)(b) § 25.303 § 25.305(a)(b)(c) § 25.307(a) § 25.561(a)(b)(c)(d) § 25.562(a)(b)(c) § 25.571(a)(b) § 25.601 § 25.603(a)(b)(c) § 25.605(a) § 25.607(a)(b)(c) § 25.609(a) § 25.611 § 25.613(a)(b) § 25.619(a)(b)(c) § 25.625(a) § 25.785(a)-(d)(f)(h)-(k) § 25.787(a)(b) § 25.789(a) § 25.791(a)(b)(e) § 25.812(e) § 25.813(c) § 25.815 § 25.853(a)(d) § 25.869(a)(4) § 25.981(a)(3) § 25.1301(a)(b)(c)(d) § 25.1307(c) § 25.1309(b)(d)(g) § 25.1351(a) § 25.1353(a)(b)(d) § 25.1357(a)(c)(g) § 25.1411(a)(b)(f) § 25.1415(a)(b) § 25.1423(c) § 25.1431(a)(c)(d) § 25.1447(a)(c)(1)(4) § 25.1501(a)(b) § 25.1529 § 25.1541(a)(b) § 25.1557(a)(c) § 25.1561(b)(c)(e) § 25.1581(a)(b)(d) § 25.1585(a)(b) Applicable 14 CFR Part 25 regulations at other amendment levels § 25.571(a)(b) [Amdt 25-72] 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]. This modification does not affect or create fatigue critical baseline structure. Special Conditions 25-358-SC, Special Conditions: Boeing Model 737 Series Airplanes; Seats with Non-Traditional, Large, Non- Metallic Panels [Docket No. NM359]. -----END----- ## Every issue (1) - August 26, 2023: Issued, Current. [certificate](https://openairdocs.org/files/sha256/2c/f4/2cf45595b3083ffd52900ed0ec54d26069c554af6eabd0a713888233fb26d94f) --- 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.