# STC SA5668NM - Type: Supplemental type certificate - Status: Current, Amended - Holder: Micro AeroDynamics Inc, United States - Description: Increase maximum takeoff weight to5680 lbs. and maximum ramp weight to 5725 lbs. (maximum landing weight not affected). - Applied: August 6, 1991 - Status date: February 14, 1997 - Product: Aircraft, Small Multi-Engine - Certification basis: Part 3, Part 21 - Data sheets: [TCDS 3A10](https://openairdocs.org/tcds/3A10) - Certificate PDF: https://openairdocs.org/files/sha256/16/03/1603f72989675a4946916f33c13eeff74d6302fbae9d5d07d7e85c4b2531a771 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/3C6ED80A0281926B85256CC200122A8E.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA5668NM ## ADs that name it (0) None. ## Approved models (2) - The Cessna Aircraft Company 310R ([TCDS 3A10](https://openairdocs.org/tcds/3A10)) - The Cessna Aircraft Company T310R ([TCDS 3A10](https://openairdocs.org/tcds/3A10)) ## 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 SA5668NM This certificate, issued to: Micro AeroDynamics, Inc. 4000 Airport Road, Suite D Anacortes, WA 98221 Part 3 of the Civil Air Regulations. Original ProductType Certificate Number: 3A10 Make: Cessna Model: T310R* and 310R* Description of the Type Design Change: Increase maximum takeoff weight to 5,680 lbs., maximum zero fuel weight to 5,300 lbs., and maximum ramp weight to 5,725 lbs. (Maximum landing weight not affected.) *NOTE: This modification is approved only when used in conjunction with STC SA4980NM. Limitations and Conditions: Approval of this change in type design applies to the above model aircraft only. This approval should not be extended to other aircraft of these models on which other previously approved modifications are incorporated unless it is determined that the relationship between this change and any of those other previously approved modifications, including changes in type design, will introduce no adverse effect upon the airworthiness of that aircraft. This STC is compatible with Colemill STC No. SA2207S0, on Cessna Model 310R only. A copy of this Certificate, Pilot's Operating Handbook C310R-AFMS-1, Rev. D, (Cessna 310R) or CT310R-AFMS-1, Rev. B, (Cessna T310R) both dated October 2, 1998, must be maintained as part of the permanent records for the modified 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. Date of application: August 6, 1991 Date reissued: Date of issuance: February 4, 1992 Date amended: April 14, 1994; September 26, 1994; February 14, 1997; October 2, 1998 (Signature) Acting Manager, Seattle Aircraft Certification Office (Title) ## Every issue (1) - February 14, 1997: Amended, Current. [certificate](https://openairdocs.org/files/sha256/16/03/1603f72989675a4946916f33c13eeff74d6302fbae9d5d07d7e85c4b2531a771) --- 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.