# STC SA2570NM - Type: Supplemental type certificate - Status: Current, Reissued - Holder: Javelin Conversions Inc., United States - Description: Installation of stiffening ribs in the aileron and rudder surfaces and redistribution of the mass balance in the aileron, rudder and elevator - Applied: September 20, 1984 - Status date: July 31, 2012 - Product: Aircraft, Small Airplane - Certification basis: Part 3, Part 21 - Data sheets: [TCDS 3A21](https://openairdocs.org/tcds/3A21) - Certificate PDF: https://openairdocs.org/files/sha256/05/7b/057b910ca5c9ddfdf297514a436e510aaf4f49f6755ade4f58cbf4278533186b - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/32BE5E03D358A49986257AA700571E1F.0001 - DRS record last changed: December 5, 2025 - Page: https://openairdocs.org/stc/SA2570NM ## ADs that name it (0) None. ## Approved models (1) - Cessna Aircraft Company P210N ([TCDS 3A21](https://openairdocs.org/tcds/3A21)) ## 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. Part 3 of the Civil Air Regulations. Installation of stiffening ribs in the aileron and rudder surfaces and redistribution of the mass balance in the aileron, rudder and elevator, in accordance with FAA sealed Air America, Incorporated, Master Drawing List, Drawing No. AA51700, Revision D, dated April 26, 1985, or later FAA approved sealed revision. The limitations and conditions of data sheet 3A21 apply to aircraft modified by these control surface(s) installations and redistributions. A copy of this STC must be included in the permanent records of each aircraft modified in accordance with this STC. 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. Javelin Conversions, Inc. 8421 Nelms Street Houston, Texas 77061 3A21 Make : Cessna Model : P210N Date of application : September 20, 1984 Date of issuance : May 23, 1985 Date reissued : January 2, 1986, April 25, 1990, October 30, 1991, June 5, 1996, July 31, 2012 ( Signature) S. Frances Cox, Manager Special Certification Office, Southwest Region ( Title) FAA Form 8110-2-1(10-69) Page 2 of 2 ## Every issue (1) - July 31, 2012: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/05/7b/057b910ca5c9ddfdf297514a436e510aaf4f49f6755ade4f58cbf4278533186b) --- 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.