# STC SA10935SC - Type: Supplemental type certificate - Status: Current, Reissued - Holder: CenTex Aerospace Inc. - Description: Remove existing Pratt & Whitney Canada PT6A-20 engines and install PT6-21, -28, or -34 engines - Status date: July 23, 2024 - Data sheets: 3A20, 3A20, 3A20, 3A20, 3A20 - Certificate PDF: https://openairdocs.org/files/sha256/2c/bb/2cbbb6a4ef3dcb18fca5ba8f8bc42e5c95251f13719b343e1e58551fe556374b - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID188256033720240731141352.0001 - Page: https://openairdocs.org/stc/SA10935SC ## ADs that name it None. ## Approved models (5) - Textron Aviation Inc. 65-A90 (TCDS 3A20) - Textron Aviation Inc. 65-A90-1 (TCDS 3A20) - Textron Aviation Inc. 65-A90-4 (TCDS 3A20) - Textron Aviation Inc. B90 (TCDS 3A20) - Textron Aviation Inc. C90 (TCDS 3A20) ## 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. SA10935SC CenTex Aerospace, Inc. 7925 Karl May Drive Waco, TX 76708 CAR 3/Part 23 the Federal Aviation Regulations 3A20 Hawker Beechcraft Corporation 65-A90, 65-A90-1, 65-A90-4, B90, C90 Remove existing Pratt & Whitney Canada PT6A-20 engines and install PT6-21, -28, or -34 engines on Hawker Beechcraft King Air 65-A90, 65-A90-1, 65-A90-4, B90 and C90 in accordance with Master Drawing List 037-0000-0000, initial release, or later FAA approved revision. Instructions for Continued Airworthiness are specified in Document No. 037-30, initial release, or later FAA approved revision. Airplane Flight Manual Supplements AFMS 037-21 for PT6A-21 engines, dated 1 December 2008, AFMS 037-28 for PT6-28 engines, dated 1 December 2008, and AFMS 037-34 for PT6A-34 engines, dated 1 December 2008, all Revision I/R, or later FAA approved revisions are 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. October 24, 2008 July 23, 2024 February 17, 2009 for Paul (Vu) Nguyen Manager, Central Certification Branch Compliance & Airworthiness Division Aircraft Certification Service 3 SA10935SC 3 SA10935SC Date of Issuance: February 17, 2009 Date of Reissuance: July 23, 2024 Certification Basis: The certification basis is the same as the original aircraft, except for areas, systems, or components changed as a result of this modification, which are approved to Amendment 23-57. Applicable to Models 65-A90, 65-A90-1, 65-A90-4, and B90: CAR 3, Effective May 15, 1956, (Am. 3-1, 3-2, 3-8); CAR 3 (Amdt. 3-6); CAR 3 § 3.705 (Amdt. 3-7); 14 CFR Part 23: §23.1385(c) (Amdt. Original); §23.1387(a); 23.1387(e) (Amdt. 12). (Special Conditions outlined by FAA letters to Beech dated January 21, 1963, February 15, 1963 and February 27, 1963). Special Conditions outlined by FAA letter to Beech dated May 5, 1965. Applicable to Model C90: CAR 3, Effective May 15, 1956, (Am. 3-1, 3-2, 3-8); CAR 3 (Amdt. 3-6); CAR 3 §3.705 (Amdt. 3-7); 14 CFR Part 23: §23.1385(c) (Amdt. Original); §23.1111 (Amdt. 23-7); §23.1387(a) and 23.1387(e) (Amdt. 12). Special Conditions outlined by FAA letters to Beech dated January 21, 1963, February 15, 1963 and February 27, 1963 and May 5, 1965. FAA Exemption No. 1554A, issued March 4, 1977 from CAR 3 §3.115(a). Applicable to All Models: 14 CFR Part 23 Sections 23.901, 23.903, 23.905, 23.907, 23.939, 23.943, 23.951, 23.955, 23.961, 23.1011, 23.1041, 23.1043, 23.1045, 23.1091, 23.1093, 23.1121, 23.1123, 23.1163, 23.1183, 23.1193, 23.1501, 23.1521, 23.1529, 23.1541, 23.1543, 23.1549, 23.1551, 23.1581, 23.1583, 23.1585, 23.1587 {all to Amendment 23-57}. -END- 3 3 ## Every issue (2) - July 23, 2024: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/2c/bb/2cbbb6a4ef3dcb18fca5ba8f8bc42e5c95251f13719b343e1e58551fe556374b) - February 17, 2009: Issued, Historical. [certificate](https://openairdocs.org/files/sha256/0e/3e/0e3e9c5f89d09845093b96ea4b73ffd690d49d34fdd96241a4f61b7efe076cbf) --- From OpenAirDocs.org, an independent open copy of FAA data. Only the Federal Register edition on govinfo.gov is the official legal text of an AD.