# STC ST09907AC - Type: Supplemental type certificate - Status: Current, Reissued - Holder: BS Designs Inc., United States - Description: Installation of Hartzell 5-blade carbon composite propellers. - Applied: August 14, 2018 - Status date: February 16, 2023 - Product: Aircraft, Large Airplane - Certification basis: Part 25 - Data sheets: [TCDS A43EU](https://openairdocs.org/tcds/A43EU) - Certificate PDF: https://openairdocs.org/files/sha256/dc/1c/dc1c53c9dded3301b813be92aff050cb4810379a31ea25978c9485b971a20f3c - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID104174623920250811181412.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/ST09907AC ## ADs that name it (0) None. ## Approved models (4) - Airbus Defense and Space S.A. C-212-CC ([TCDS A43EU](https://openairdocs.org/tcds/A43EU)) - Airbus Defense and Space S.A. C-212-CD ([TCDS A43EU](https://openairdocs.org/tcds/A43EU)) - Airbus Defense and Space S.A. C-212-CE ([TCDS A43EU](https://openairdocs.org/tcds/A43EU)) - Airbus Defense and Space S.A. C-212-CF ([TCDS A43EU](https://openairdocs.org/tcds/A43EU)) ## 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. ST09907AC BS Designs, Inc. 111 Private Road 2218 Decatur, TX 76234 Part 25 the Federal Aviation Regulations A43EU Airbus Defense and Space S.A. C-212-CC/-CD/-CE/-CF Installation of a Hartzell 5-blade carbon composite propellers in accordance with Master Data List BSD-MDL-212P, Revision B, dated November 10, 2019, or later FAA approved revision. Airplane Flight Manual Supplement BSD-FMS-212P, Revision IR, dated December 5, 2019, or later FAA approved revision is required. The installer must determine whether this design change is compatible with previously approved modifications. 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. August 14, 2018 February 16, 2023 December 10, 2019 S. Frances Cox Acting Manager, Fort Worth ACO Branch, Compliance & Airworthiness Division Aircraft Certification Service 4 ST09907AC 4 ST09907AC Date of Issuance: December 10, 2019 Date of Reissuance: February 16, 2023 Certification Basis: Based on 14 CFR ยงยง21.115 and 21.101, and FAA policy for significant changes in FAA Order 8110.48, the certification basis for the Airbus Defense and Space S.A. C-212 is as follows: a. The type certification basis for C-212 airplanes is shown on TCDS A43EU 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 applications, August 14, 2018, is based upon 14 CFR part 25. Regulations at the amendment level in TCDS A43EU (25-0 through 25-35 and 36-1 through 36-17) 25.29; 25.31, 25.33; 25.101(a),(b),(c); 25.103; 25.105(a),(b),(c)(1),(d); 25.107; 25.109(a); 25.111(a),(b),(c),(d); 25.113(a); 25.115; 25.117; 25.119; 25.121; 25.143(a),(b); 25.147(a),(c); 25.149(a),(c),(d); 25.161(d); 25.171; 25.201; 25.203; 25.251; 25.301; 25.303; 25.305; 25.307; 25.321; 25.331; 25.333; 25.335; 25.337; 25.341; 25.345; 25.349; 25.351; 25.361(a),(b),(c)(1); 35.363; 25.367; 35.371; 25.391(b),(c),(d); 25.407; 25.409; 25.427(a),(b)(1); 25.457; 25.471(a),(b); 25.481(a),(c); 25.561(a),(b)(3),(c); 25.571; 25.581; 25.601; 25.603; 25.605; 25.607; 25.609(a)(1),(a)(2); 25.611; 25.613; 25.615; 25.619; 25.623; 25.625; 25.629; 25.651; 25.681; 25.701(a),(b); 25.875(a); 25.901(a)(1),(b), and (c); 25.905; 25.907; 25.925(a),(c); 25.929(a); 25.933(a),(c); 25.1041; 25.1165(b); 25.1301; 25.1307(c); 25.1309(a),(b),(c),(d),(e),(f),(g); 25.1337(e); 25.1351(a); 25.1353(a); 25.1357(a),(b),(c),(d),(e); 25.1359(d); 25.1419(b); 25.1501; 25.1513; 25.1521(a); 25.1529; 25.1533(a); 25.1541; 25.1543(b); 25.1549(d); 25.1581; 25.1583(a),(b)(h); 25.1585(a)(6); 25.1587 3 4 ST09907AC Date of Issuance: December 10, 2019 Date of Reissuance: February 16, 2023 Certification Basis (continued): Regulations at the latest amendment 25-0 through 25-144 and 36-0 through 36-31 36.1(a)(1),(c),(f); 36.2(b); 36.3; 36.6; 36.7(a),(b),(d)(2); 36.101; 36.103(a); 36.105; 36.1581(a)(1),(c); 36.1501(a) -END- 4 4 ## Every issue (2) - February 16, 2023: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/dc/1c/dc1c53c9dded3301b813be92aff050cb4810379a31ea25978c9485b971a20f3c) - December 10, 2019: Issued, Historical. [certificate](https://openairdocs.org/files/sha256/73/dc/73dc6d123338718d74adc258f5956b6281a69b9bfb2f7016f592f93746172587) --- From OpenAirDocs.org, an independent open copy of FAA and NTSB data. Only the Federal Register edition on govinfo.gov is the official legal text of an AD.