# STC ST04578CH - Type: Supplemental type certificate - Status: Current, Reissued - Holder: Apcela ATG, United States - Description: Installation of SmartSky system - Applied: July 6, 2022 - Status date: May 28, 2026 - Product: Aircraft, Large Airplane - Certification basis: Part 25 - Data sheets: [TCDS T00007WI](https://openairdocs.org/tcds/T00007WI) - Certificate PDF: https://openairdocs.org/files/sha256/62/c5/62c5e995d6c902dd35798aa4e363ed7f5a8f433b46d2d85838834ce40f0f7dcf - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID127493348420260624170038.0001 - DRS record last changed: June 25, 2026 - Page: https://openairdocs.org/stc/ST04578CH ## ADs that name it (0) None. ## Approved models (1) - Textron Aviation Inc. 750 ([TCDS T00007WI](https://openairdocs.org/tcds/T00007WI)) ## 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 Number This certificate issued to: ST04578CH Apcela ATG 1818 Library St., Suite 500 Reston, VA 20190 Part 25 14 CFR T00007WI Textron Aviation 750 1. The installer must determine whether this design change is compatible with previously approved modifications. (Continued on page 3) 07/06/2022 10/27/2022 05/28/2026 08/12/2022 for Mr. Jason S. Deutschman Acting Manager, Central Certification Branch Compliance & Airworthiness Division Aircraft Certification Service 3 Installation of a SmartSky System in accordance with FAA Approved Master Data List LP5393-1002, Revision (B), dated August 4, 2022, or later FAA Approved revision. (Continued on page 3) United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number Date o transfer: ST04578CH 05/28/2026 3 United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number ST04578CH 05/28/2026 Description of Type Design Change (Continued from page 1): FAA Approved Airplane Flight Manual Supplement document number LP5393-2007, Revision (IR), dated August 4, 2022, or later FAA Approved revision, is a required part of this modification. This aircraft must be maintained in accordance with FAA Accepted Instructions for Continued Airworthiness, document number LP5393-2006, Revision (A), dated August 2, 2022, or later FAA Accepted revision, in addition to the basic airplane maintenance manuals. Limitations and Conditions (Continued from page 1): 2. 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. 3. This STC is applicable to all serial numbers for this Make-Model. 4. The installer must ensure TPED tolerance of aircraft. This may require prior or concurrent embodiment of a TPED STC or Service Bulletin. Certification Basis: Based on 14 CFR §§21.101, 21.115 and the FAA policy for significant changes in FAA Order 8110.48A, the certification basis for Textron Aviation 750 Aircraft Installation of a SmartSky System is as follows: a. The type certification basis for Textron Aviation 750 is shown on TCDS T00007WI for parts not changed or not affected by the change. b. The certification basis for parts changed or affected by the change since the reference date of application, July 6, 2022, is based upon TCDS T00007WI. Based on 14 CFR §21.101, 21.115 and the FAA policy for significant changes in FAA Order 8110.48A, the certification basis for this modification was determined to be: Regulations at the amendment level in TCDS T00007WI: 25.1(a, b) [Original]; 25.301(a, b) [25-23]; 25.303 [25-23]; 25.305(a, b) [25-54]; 25.307(a) [25-72]; 25.341(a-c) [25-72]; 25.365(a, b, d) [25-72]; 25.561(a-c) [25-64]; 25.571(a, b) [25-72]; 25.601 [Original]; 25.603(a-c) [25-46]; 25.605(a) [25-46]; 25.607(a-c) [25-23]; 25.609(a, b) [Original]; 25.611 [25-23]; 25.613(a, b, d) [25-72]; 25.619 (a-c) [25-23]; 25.625(a-c) [25-72]; 25.853(a) [25-72]; 25.869(a(4)) [25-72]; 25.1301(a-d) [Original]; 25.1307(c) [25-72]; 25.1309(a, b, d, g) [25-41]; 25.1322(c, d) [25-38]; 25.1351(a) [25-72]; 25.1353(a, b) [25-42]; 25.1357(a, c) [Original]; 25.1431(a, c) [Original]; 25.1501(a, b) [25-42]; 25.1529 [25-54]; 25.1581(a(2), d) [25-72]; 25.1585(a, b) [25-46]; Special Condition 25-ANM-80. ------------------------------------------------------------END-------------------------------------------------------------- 3 3 ## Every issue (4) - May 28, 2026: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/62/c5/62c5e995d6c902dd35798aa4e363ed7f5a8f433b46d2d85838834ce40f0f7dcf) - October 27, 2022: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/77/87/7787da92578fa3b49ef7476ac10ef6c898066fe851154835846fe5e64917019b) - August 12, 2022: Issued, Historical. [certificate](https://openairdocs.org/files/sha256/3b/63/3b6365d91f9eb21c1e6319d934f878ca131439738544971902642bc8f18901a4) - August 12, 2022: Issued, Historical. [certificate](https://openairdocs.org/files/sha256/3b/63/3b6365d91f9eb21c1e6319d934f878ca131439738544971902642bc8f18901a4) --- 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.