# STC SA4-1397 - Type: Supplemental type certificate - Status: Current, Reissued - Holder: SOUTHWESTERN AERO EXCHANGE INC., United States - Description: Installation of Tricycle landing gear and nose assembly. - Applied: March 2, 1961 - Status date: February 27, 2006 - Product: Aircraft, Small Multi-Engine - Certification basis: Part 21 - Data sheets: [TCDS A-765](https://openairdocs.org/tcds/A-765) - Certificate PDF: https://openairdocs.org/files/sha256/7d/21/7d210cfb2e091c979449a55a13282000e57e40c669a59232d407ab4be7532fa8 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/CA242B0727B5425D8625713000627169.0001 - DRS record last changed: December 5, 2025 - Page: https://openairdocs.org/stc/SA4-1397 ## ADs that name it (0) None. ## Approved models (3) - 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 D18S ([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. This Certificate issued to Southwestern Aero Exchange, Inc. 18502 East 108th Street, North Owasso, OK 74055-8124 Part CAR 3 of the Civil Air Regulations. A-765 BEECH C-45G, C-45H, D-18S Description of Type Design Change: Installation of Tricycle Landing Gear and Revised Nose Assembly in accordance with Volpar Assembly Drawing Number 427. Limitations and Conditions. This approval should not be extended to other specific airplanes of this model on which other previously approved modifications are incorporated unless it is determined that the interrelationship between this change and any of those other previously approved modifications will introduce no adverse effect upon the airworthiness of that airplane. AD-53-6-3 is to be accomplished prior to installation of the new gear assembly. 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. (See Page 3.) 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: March 2, 1961 Date of issuance: February 17, 1961 Date reissued: Jan. 23, 1998; Feb. 27, 2006 Date amended: Mar. 22, 1961 ( Signature) Manager, Technical & Administrative Support Staff, Los Angeles Aircraft Certification Office ( Title) Number SA4-1397 Limitations and Conditions: – continued All nose gear cylinder casting are to be ultimate tested for the side lead condition of CAR 3.256. Parts damaged by this test are not to be used. Volpar Airplane Flight Manual Supplement dated February 17, 1961, is required with this modification. The Agency installing this STC kit will provide an adequate weight and balance report with each modification. The modified airplane maximum gross weight is not to exceed that listed in the Aircraft Specification or 9000 pounds, whichever is less. - END - ## Every issue (1) - February 27, 2006: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/7d/21/7d210cfb2e091c979449a55a13282000e57e40c669a59232d407ab4be7532fa8) --- 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.