# STC ST04593CH - Type: Supplemental type certificate - Status: Current, Reissued - Holder: Astronics Connectivity Systems and Certification Corp., United States - Description: Installation of Astronics EmPower In-Seat Power System - Applied: August 31, 2022 - Status date: April 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/sha256/31/20/31207e80f71ee37550310564177d62b5fb34e398f07e9b20f172b05130217c6e - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID120789065120260527174455.0001 - DRS record last changed: May 27, 2026 - Page: https://openairdocs.org/stc/ST04593CH ## ADs that name it (0) None. ## Approved models (2) - The Boeing Company 737-8 ([TCDS A16WE](https://openairdocs.org/tcds/A16WE)) - The Boeing Company 737-800 Series ([TCDS A16WE](https://openairdocs.org/tcds/A16WE)) ## What the certificate says This is OCR from the scanned FAA certificate. OCR can misread letters and numbers. United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: ST04593CH This certificate issued to: Astronics Connectivity Systems and Certification Corp. 804 S. Northpoint Blvd Waukegan, IL 60085 Part 25 of the Federal Aviation Regulations. Original Product Make: Boeing Type Certificate Number: A16WE Model: 737-8; 737-800 Series Description of Type Design Change: Installation of Astronics EmPower In-Seat Power System in accordance with Astronics Armstrong Aerospace Master Data List, Doc. DC104-141741-00, Revision Y, dated April 2, 2026, or later FAA approved revision. 1) This STC is applicable to all serial numbers for these Make-Models. 2) The installer must determine whether this design change is compatible with previously approved modifications. 3) FAA Approved Airplane Flight Manual Supplement, Astronics CSC Doc. No. DC303-141741-00, Revision B, approved December 13, 2024, or later FAA approved revision, is required on board the modified aircraft for the applicable configurations as defined in the Master Data List. 4) FAA Approved Airplane Flight Manual Supplement, Astronics Connectivity Systems and Certification Corp Doc. No. DC303-141741-10, Revision A, approved December 13, 2024, or later FAA approved revision, is required on board the modified aircraft for applicable configurations as defined in the Master Data List. 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. Date of Application: August 31, 2022 Date Reissued: October 22, 2024; July 14, 2025; April 7, 2026 Date of Issuance: February 20, 2023 Date Amended: October 22, 2024; April 15, 2025; October 10, 2025 By Direction of the Administrator Signature: _ Brenda L. Litchfield ODA Administrator Title: Envoy Aerospace, LLC ODA-831240-CF United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: ST04593CH United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: ST04593CH Date Reissued: April 7, 2026 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 737-8 and 737-800 Series aircraft is as follows: a. The type certification basis for the Boeing 737-8 and 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 to Boeing 737-8 aircraft (MDL Groups 1 and 2): Applicable 14 CFR Part 25 regulations at the latest amendment 25-0 through 25-137, 25-141 § 25.29(a)(b) § 25.787(a)(b) § 25.1529 § 25.301(a)(b) § 25.789(a) § 25.1541(a)(b) § 25.303 § 25.791(a)(b)(e) § 25.1581(a)(b)(d) § 25.305(a) (b)(c) § 25.813(a)(b)(c)(d) § 25.1585(a)(b) § 25.307(a) § 25.815 § 25.1701(a)(b) § 25.561(a) (b)(c) § 25.817 § 25.1703(a)(b) § 25.562(a) (b)(c)(1)-(8) § 25.853(a) § 25.1705(b) § 25.571(a)(b) § 25.869(a)(3) § 25.1707(a)(b)(e)(f)(g)(h) § 25.601 § 25.899(a)(1)(b) § 25.1707(1)0)(1) § 25.603(a)(b)(c) § 25.981(a) § 25.1709(a)(b) § 25.605(a) § 25.1301(a)(1)-(4)(b) § 25.1711 (a)(c)(d)(e) § 25.607(a)(b)(c) § 25.1307(c) § 25.1713(c) § 25.609(a) § 25.1309(a)(b)(d)(g) § 25.1715 § 25.611(a)(b) § 25.1351(a)(1) § 25.1717 § 25.613(a)(b) § 25.1353(a)(c) § 25.1719 § 25.619(a)(b)(c) § 25.1357(a)(c) § 25.1721(b)(c) § 25.625(a)(d) § 25.1360(a) § 25.1729 § 25.785(a) (b)(c)(f)(1)(3) § 25.1431 (a)(b)(c)(d) § 25.785(i)(i)(k) § 25.1501(a)(b) Applicable 14 CFR Part 26 regulations at the latest amendment 26-0 through 26-7 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]. United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: ST04593CH Date Reissued: April 7, 2026 Certification Basis: (continued) Equivalent Level of Safety ELOS Memorandum # PS12-0038-C-1-1; 14 CFR Part 25 25.813(c)(1)(i), 25.813(c)(2)(i) [Amdt 25-88]; Equivalent Level of Safety (ELOS) Finding for the Passageway to and Opening of Overwing Exits for Boeing Models 737-7/-8/-9/-8200/-10 Airplanes. Special Conditions 25-358-SC, Special Conditions: Boeing Model 737 Series Airplanes; Seats With Non-Traditional, Large, Non- Metallic Panels [Docket No. NM359]. Applicable to Boeing 737-8 aircraft (MDL Groups 5. 6.9. 10, 13 and 14): Applicable 14 CFR Part 25 regulations at the latest amendment 25-0 through 25-137, 25-141 § 25.29(a)(b) § 25.789(a) § 25.1581 (a)(b)(d) § 25.301(a)(b) § 25.813(a) (b)(c)(d) § 25.1585(a)(b) § 25.303 § 25.853(a) § 25.1701(a)(b) § 25.305(a) (b)(c) § 25.869(a)(3) § 25.1703(a)(b) § 25.307(a) § 25.899(a)(1)(b) § 25.1705(b) § 25.561(a) (b)(c) § 25.981(a) § 25.1707(a) (b)(e)(1)(g) (h) § 25.571(a)(b) § 25.1301(a)(1)-(4)(b) § 25.1707(i)(i)(1) § 25.601 § 25.1307(c) § 25.1709(a)(b) § 25.603(a) (b)(c) § 25.1309(a)(b)(d)(g) § 25.1711(a) (c)(d)(e) § 25.605(a) § 25.1351(a)(1) § 25.1713(c) § 25.607(a) (b)(c) § 25.1353(a)(c) § 25.1715 § 25.609(a) § 25.1357(a)(c) § 25.1717 § 25.611(a)(b) § 25.1360(a) § 25.1719 § 25.613(a)(b) § 25.1431(a) (b)(c)(d) § 25.1721(b)(c) § 25.619(a) (b)(c) § 25.1501 (a)(b) § 25.1729 § 25.625(a)(d) § 25.1529 Applicable 14 CER Part 26 regulations at the latest amendment 26-0 through 26-7 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: United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: ST04593CH Date Reissued: April 7, 2026 Certification Basis: (continued) Applicable to Boeing 737-8 aircraft (MDL Groups 8. 12 and 10): Applicable 14 CFR Part 25 regulations at the latest amendment 25-0 through 25-137, 25-141 § 25.29(a)(b) § 25.1309(a)(g) § 25.1707(a) (b)(e)(1)(g) (h) § 25.601 § 25.1351(a)(1) § 25.1707(1)()(1) § 25.611(b) § 25.1353(a)(c) § 25.1711(a)(c)(d)(e) § 25.813(a) (b)(c)(d) § 25.1357 (a)(c) § 25.1713(c) § 25.853(a) § 25.1360(a) § 25.1715 § 25.869(a)(3) § 25.1431(a) (b)(c)(d) § 25.1717 § 25.899(a)(1)(b) § 25.1529 § 25.1719 § 25.981(a) § 25.1701(a) (b) § 25.1721(b)(c) § 25.1301(a)(1)-(4)(b) § 25.1703(a)(b) § 25.1729 § 25.1307(c) § 25.1705(b) Applicable 14 CFR Part 26 regulations at the latest amendment 26-0 through 26-7 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. United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: ST04593CH Date Reissued: April 7, 2026 Certification Basis: (continued) Applicable to Boeing 737-800 Series aircraft (MDL Groups 3 and 4): Applicable 14 CER Part 25 regulations at the latest amendment 25-0 through 25-77, as amended by TCDS A16WE § 25.29(a)(b) § 25.609(a) § 25.817 § 25.301(a) (b) § 25.611 § 25.1301 (a)(b)(c)(d) § 25.303 § 25.613(a)(b) § 25.1307(c) § 25.305(a) (b)(c) § 25.619(a) (b)(c) § 25.1309(a)(b)(d)(g) § 25.307(a) § 25.625(a)(d) § 25.1351(a)(1) § 25.561(a) (b)(c) § 25.785(a) (b)(c)(1)(1)(3) § 25.1353(a)(b) § 25.562(a) (b)(c)(1)-(8) § 25.785(1)(i1)(k) § 25.1357 (a)(c) § 25.571(a) (b) § 25.787(a)(b) § 25.1431 (a)(b)(c) § 25.601 § 25.789(a) § 25.1501 (a)(b) § 25.603(a) (b)(c) § 25.791(a)(b)(e) § 25.1529 § 25.605(a) § 25.813(a) (b)(c)(d) § 25.1541(a)(b) § 25.607(a) (b)(c) § 25.815 § 25.1581 (a)(b)(d) Applicable 14 CFR Part 25 regulations at other amendment levels § 25.853(a) [Amdt 25-116]; § 25.869(a)(4) [Amdt 25-113]; § 25.981(a) [Amdt 25-125]. Applicable 14 CFR Part 26 regulations at the latest amendment 26-0 through 26-7 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]. Equivalent Level of Safety ELOS Memorandum # TD8301SE-T-C-1; 14 CFR Part 25 25.813(c)(1)(i), 25.813(c)(2)(i) [Amdt 25-77]; Equivalent Level of Safety (ELOS) Finding for the Passageway to and Opening of Overwing Exits for Boeing 737-600, -700, -700C, -800, -900 Series Aircraft. Special Conditions 25-358-SC, Special Conditions: Boeing Model 737 Series Airplanes; Seats With Non-Traditional, Large, Non- Metallic Panels [Docket No. NM359] United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: ST04593CH Date Reissued: April 7, 2026 Certification Basis: (continued) Applicable to Boeing 737-800 Series aircraft (MDL Groups 7.11 and 15): Applicable 14 CFR Part 25 regulations at the latest amendment 25-0 through 25-77, as amended by TCDS A16WE § 25.29(a)(b) § 25.607(a)(b)(c) § 25.1309(a)(b)(d)(g) § 25.301(a) (b) § 25.609(a) § 25.1351(a)(1) § 25.303 § 25.611 § 25.1353(a)(b) § 25.305(a) (b)(c) § 25.613(a)(b) § 25.1357 (a)(c) § 25.307(a) § 25.619(a)(b)(c) § 25.1431(a)(b)(c) § 25.561(a) (b)(c) § 25.625(a)(d) § 25.1501 (a)(b) § 25.571(a) (b) § 25.789(a) § 25.1529 § 25.601 § 25.813(a) (b)(c)(d) § 25.1581 (a)(b)(d) § 25.603(a) (b)(c) § 25.1301(a) (b)(c)(d) § 25.605(a) § 25.1307(c) Applicable 14 CFR Part 25 regulations at other amendment levels § 25.853(a) [Amdt 25-116]; § 25.869(a)(4) [Amdt 25-113]; § 25.981(a) [Amdt 25-125]. Applicable 14 CFR Part 26 regulations at the latest amendment 26-0 through 26-7 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 (5) - April 7, 2026: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/31/20/31207e80f71ee37550310564177d62b5fb34e398f07e9b20f172b05130217c6e) - October 10, 2025: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/e5/39/e53967c75f2d34ebe35bfa236ec2168826a2023f6270d07959124092386c7d0b) - April 15, 2025: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/52/be/52be1ce11e8347a8731609fcc8e7a8a1c00d0eb8e8799e0a5dc6c4af90b76486) - October 22, 2024: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/07/2c/072c59d22601373a079a82c085158fddfa423131f8a8d2cc99d995fa15e3e028) - February 20, 2023: Issued, Historical. [certificate](https://openairdocs.org/files/sha256/97/9e/979ece1cc52d77629ac5d93f29d1a807207f11b29f1b11ae785daa170d168b85) --- 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.