# STC SA4537NM - Type: Supplemental type certificate - Status: Current, Reissued - Holder: Dynamic Aviation Group Inc., United States - Description: Installation of upper wing reinforcement kit. - Applied: December 8, 1988 - Status date: October 2, 2014 - Product: Aircraft, Small Multi-Engine - Certification basis: Part 3, Part 21 - Data sheets: [TCDS 3A20](https://openairdocs.org/tcds/3A20) - Certificate PDF: https://openairdocs.org/files/sha256/af/38/af384df29118ee8d2aa792b997de04dec1eddbf30afad0369332fda6247c47b3 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D67DB6CA3FD3E18486257D7300601729.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA4537NM ## ADs that name it (0) None. ## Approved models (3) - Beechcraft Corporation B90 ([TCDS 3A20](https://openairdocs.org/tcds/3A20)) - Beechcraft Corporation C90 ([TCDS 3A20](https://openairdocs.org/tcds/3A20)) - Beechcraft Corporation E90 ([TCDS 3A20](https://openairdocs.org/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. This Certificate issued to Dynamic Aviation Group, Inc. 1402 Airport Rd., PO Box 7 Bridgewater, VA 22812 Part 3* of the Civil Air Regulations *See Type Certificate Data Sheet No. 3A20 for Complete Certification Basis. Original Product Type Certificate Number : 3A20 Make : Beech Model : B90, C90, E90 Description of Type Design Change: Installation of upper wing reinforcement kit in accordance with FAA Sealed Aviadesign, Inc. Master Drawing List E. O. –B-8808, Issue 4, dated February 21, 1989, or later FAA approved revision. Limitations and Conditions: This installation should not be incorporated in any aircraft unless it is determined that the interrelationship between this change and any previously approved configuration will not introduce any adverse effect upon the airworthiness of the aircraft. If the holder agrees to permit another person to use this certificate to alter the product, the holder shall give the other person written evidence of that permission. A copy of this STC must be included in the permanent records of each airplane modified in accordance with this STC. Date of application : December 8, 1988 Date of issuance : March 15, 1989 Date reissued : October 2, 2014 (Signature) Supervisor, Technical and Administrative Support Staff Los Angeles Aircraft Certification Office (Title) Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee) (Address of transferee) (Number and street) (City, State, and ZIP Code) from (Name of grantor) (Print or type) (Address of grantor) (Number and street) (City, State, and ZIP Code) Signature of grantor (In ink): U.S. GPO 1987-763-289 ## Every issue (1) - October 2, 2014: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/af/38/af384df29118ee8d2aa792b997de04dec1eddbf30afad0369332fda6247c47b3) --- 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.