# STC SA4-1645 - Type: Supplemental type certificate - Status: Current, Reissued - Holder: SOUTHWESTERN AERO EXCHANGE INC., United States - Description: Installation of Stewart-Warner Model 8259-A heater. - Applied: May 25, 1961 - Status date: February 24, 2006 - Product: Aircraft, Small Multi-Engine - Certification basis: Part 3, Part 21 - Data sheets: [TCDS A-765](https://openairdocs.org/tcds/A-765) - Certificate PDF: https://openairdocs.org/files/sha256/c2/8f/c28fc0e15e980b8fe322fca9a8d5d7b833f65df2bc6fe9bcf15870c747df99d1 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/094EAF52E640F7968625712600549A25.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA4-1645 ## ADs that name it (0) None. ## Approved models (15) - Raytheon Aircraft Company 18 Series ([TCDS A-765](https://openairdocs.org/tcds/A-765)) - Raytheon Aircraft Company C-45 Series ([TCDS A-765](https://openairdocs.org/tcds/A-765)) - Raytheon Aircraft Company C-45G ([TCDS A-765](https://openairdocs.org/tcds/A-765)) - Raytheon Aircraft Company C-45H ([TCDS A-765](https://openairdocs.org/tcds/A-765)) - Raytheon Aircraft Company D18C ([TCDS A-765](https://openairdocs.org/tcds/A-765)) - Raytheon Aircraft Company D18S ([TCDS A-765](https://openairdocs.org/tcds/A-765)) - Raytheon Aircraft Company E18S ([TCDS A-765](https://openairdocs.org/tcds/A-765)) - Raytheon Aircraft Company E18S-9700 ([TCDS A-765](https://openairdocs.org/tcds/A-765)) - Raytheon Aircraft Company G18S ([TCDS A-765](https://openairdocs.org/tcds/A-765)) - Raytheon Aircraft Company H18 ([TCDS A-765](https://openairdocs.org/tcds/A-765)) - Raytheon Aircraft Company JRB-6 ([TCDS A-765](https://openairdocs.org/tcds/A-765)) - Raytheon Aircraft Company TC-45G ([TCDS A-765](https://openairdocs.org/tcds/A-765)) - Raytheon Aircraft Company TC-45H ([TCDS A-765](https://openairdocs.org/tcds/A-765)) - Raytheon Aircraft Company TC-45J ([TCDS A-765](https://openairdocs.org/tcds/A-765)) - Raytheon Aircraft Company UC-45J (SNB-5) ([TCDS A-765](https://openairdocs.org/tcds/A-765)) ## 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. Number SA4-1645 This Certificate issued to Southwestern Aero Exchange, Inc. 18502 East 108th Street, North Owasso, OK 74055-8124 Part 3* of the Civil Air Regulations. *CAR-3 dated November 13, 1945. A-765 BEECH D18C, D18S, E18S, E18S-9700, G18S, H18, C-45G, C-45H, TC-45G, TC-45H, TC-45J, (SNB-5), JRB-6 Description of Type Design Change: Installation of Stewart-Warner Model 8259-A heater in accordance with Volpar, Inc. sealed Drawing No. 61103, Sheets Nos. 1 through 18. Change letters “A” or “B” are approved. Limitations and Conditions: 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. Limited to aircraft previously modified to include STC SA4-1531. Revision dated September 1, 1961, and STC SA111WE dated May 3, 1962. This certificate and the supporting data, which is the basis for approval, shall remain in effect until surrendered, suspended, revoked or a termination date is otherwise established by the Administrator of the Federal Aviation Administration. Date of application: May 25, 1961 Date of issuance: December 7, 1961 Date reissued: July 6, 1967; Jan. 23, 1998; Feb. 24, 2006 Date amended: Nov. 16, 1967; May 29, 1963; Nov. 19, 1963; Aug. 4, 1964 ( Signature) Manager, Technical & Administrative Support Staff, Los Angeles Aircraft Certification Office ( Title) Number SA111WE Limitations and Conditions (Continued) Gross weights in excess of those shown on aircraft specification A-765 but not in excess of 9772 lbs. landing and extension of rear C.G. extremes cannot be realized unless a gross weight basic modernization kit (STC SA2-820 or SA4-1462 or equivalent) is incorporated. FAA Approved Flight Manual dated 05/03/62 required as part of the installation. Airplane Flight Supplement revision dated 04/03/64 required when rear C.G. extremes are extended. - END - ## Every issue (1) - February 24, 2006: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/c2/8f/c28fc0e15e980b8fe322fca9a8d5d7b833f65df2bc6fe9bcf15870c747df99d1) --- 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.