# STC SA01935LA - Type: Supplemental type certificate - Status: Current, Amended - Holder: Aircraft Performance Modifications, United States - Description: Installation of external aft body strakes. - Applied: February 1, 2005 - Status date: November 28, 2017 - Product: Aircraft, Small Airplane - Certification basis: Part 21, Part 23 - Data sheets: [TCDS A7CE](https://openairdocs.org/tcds/A7CE), [TCDS A20SO](https://openairdocs.org/tcds/A20SO), [TCDS A8EA](https://openairdocs.org/tcds/A8EA), [TCDS A23SO](https://openairdocs.org/tcds/A23SO), [TCDS 3A25](https://openairdocs.org/tcds/3A25), [TCDS A25CE](https://openairdocs.org/tcds/A25CE), [TCDS A28CE](https://openairdocs.org/tcds/A28CE) - Certificate PDF: https://openairdocs.org/files/sha256/dd/4e/dd4ec1903824299e3e916702ef611c07b28630e8d1244c8a7862dc6278f94466 - Approved model list and other attachments: [SA01953LA_AML.pdf](https://openairdocs.org/files/sha256/7e/a6/7ea676a801dd04ccc10e03f81fac4bc146bdde0479bebb341a1a0594d2b7af97) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C3E2640AA19B2398862581EE00594601.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA01935LA ## ADs that name it (0) None. ## Approved models (31) - Cessna Aircraft Company 401 ([TCDS A7CE](https://openairdocs.org/tcds/A7CE)) - Cessna Aircraft Company 401A ([TCDS A7CE](https://openairdocs.org/tcds/A7CE)) - Cessna Aircraft Company 401B ([TCDS A7CE](https://openairdocs.org/tcds/A7CE)) - Cessna Aircraft Company 402 ([TCDS A7CE](https://openairdocs.org/tcds/A7CE)) - Cessna Aircraft Company 402A ([TCDS A7CE](https://openairdocs.org/tcds/A7CE)) - Cessna Aircraft Company 402B ([TCDS A7CE](https://openairdocs.org/tcds/A7CE)) - Cessna Aircraft Company 402C ([TCDS A7CE](https://openairdocs.org/tcds/A7CE)) - Cessna Aircraft Company 411 ([TCDS A7CE](https://openairdocs.org/tcds/A7CE)) - Cessna Aircraft Company 411A ([TCDS A7CE](https://openairdocs.org/tcds/A7CE)) - Cessna Aircraft Company 414 ([TCDS A7CE](https://openairdocs.org/tcds/A7CE)) - Cessna Aircraft Company 414A ([TCDS A7CE](https://openairdocs.org/tcds/A7CE)) - Cessna Aircraft Company 421 ([TCDS A7CE](https://openairdocs.org/tcds/A7CE)) - Cessna Aircraft Company 421A ([TCDS A7CE](https://openairdocs.org/tcds/A7CE)) - Cessna Aircraft Company 421B ([TCDS A7CE](https://openairdocs.org/tcds/A7CE)) - Cessna Aircraft Company 421C ([TCDS A7CE](https://openairdocs.org/tcds/A7CE)) - Cessna Aircraft Company 425 ([TCDS A7CE](https://openairdocs.org/tcds/A7CE)) - Piper Aircraft Inc. PA-31 ([TCDS A20SO](https://openairdocs.org/tcds/A20SO)) - Piper Aircraft Inc. PA-31-300 ([TCDS A20SO](https://openairdocs.org/tcds/A20SO)) - Piper Aircraft Inc. PA-31-325 ([TCDS A20SO](https://openairdocs.org/tcds/A20SO)) - Piper Aircraft Inc. PA-31-350 ([TCDS A20SO](https://openairdocs.org/tcds/A20SO)) - Piper Aircraft Inc. PA-31P ([TCDS A8EA](https://openairdocs.org/tcds/A8EA)) - Piper Aircraft Inc. PA-31T ([TCDS A8EA](https://openairdocs.org/tcds/A8EA)) - Piper Aircraft Inc. PA-31T1 ([TCDS A8EA](https://openairdocs.org/tcds/A8EA)) - Piper Aircraft Inc. PA-31T2 ([TCDS A8EA](https://openairdocs.org/tcds/A8EA)) - Piper Aircraft Inc. PA-42 ([TCDS A23SO](https://openairdocs.org/tcds/A23SO)) - Piper Aircraft Inc. PA-42-1000 ([TCDS A23SO](https://openairdocs.org/tcds/A23SO)) - Piper Aircraft Inc. PA-42-720 ([TCDS A23SO](https://openairdocs.org/tcds/A23SO)) - Textron Aviation Inc. 340 ([TCDS 3A25](https://openairdocs.org/tcds/3A25)) - Textron Aviation Inc. 340A ([TCDS 3A25](https://openairdocs.org/tcds/3A25)) - Textron Aviation Inc. 404 ([TCDS A25CE](https://openairdocs.org/tcds/A25CE)) - Textron Aviation Inc. 441 ([TCDS A28CE](https://openairdocs.org/tcds/A28CE)) ## 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. FAA Form 8110-2 (5/14) Page 1 of 2 Part 23 of the Federal Aviation Regulations. (See Page 3 for complete certification basis) Installation of external aft body strakes, in accordance with FAA approved Aircraft Performance Modifications Master Drawing List as listed in AML No. SA01935LA, Revision IR, or later FAA approved revision. 1. FAA accepted Instructions for Continued Airworthiness is required, as listed in AML No. SA01935LA, Revision D, or later FAA approved revision. These Instructions for Continued Airworthiness must be available in accordance with 14 CFR Part 21.50(b). 2. Compatibility of this design change with previously approved modifications must be determined by the installer. 3. 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. 4. A copy of this certificate must be maintained as a part of the permanent records of the aircraft. Date of Application: February 1, 2005 Date Reissued: February 5, 2007 Date of Issuance: December 28, 2006 Date Amended: 04/17/2007; August 14,2009; November 28 , 2017 By Direction of the Administrator Signature SA01935LA Aircraft Performance Modifications 24 Sandford Road Colorado Springs, CO 80906 See attached FAA Approved Model List (AML) No. SA01935LA for list of approved airplane models and type certification basis Todd G. Dixon Manager, Denver ACO Branch Compliance and Airworthiness Division FAA Form 8110-2 (5/14) Page 2 of 2 To (Name and address of transferee) From (Name and address of grantor) FAA Form 8110-2 (5/14) Page 3 of ### SA01953LA_AML.pdf SA01935LA Aircraft Performance Modifications For Installation of External Aft Body Strakes Item Aircraft Make Aircraft Model Original Type Certificate Number Certification Basis Master Drawing List Number Rev./Date Instructions for Continued Airworthiness AML Amendment Date 1 Cessna 401, 401A, 401B, 402, 402A, 402B, 402C, 411, 411A, 414, 414A, 421, 421A, 421B, 421C, 425 A7CE CFR Part 23 as Listed in the TCDS G3-050504-002 Rev. C 11/26/2006 (1) G3-050504-008, Revision B, dated 8/29/2006 (1) Original 8/14/2009 2 Cessna 441 A28CE CFR Part 23 as Listed in the TCDS G3-050504-002 Rev. J 5/18/2009 (1) G3-050504-008, Revision C, dated 05/30/2009 (1) Original 8/14/2009 3 Cessna 404 A25CE CFR Part 23 as Listed in the TCDS G3-050504-002 Rev. K 12/31/2009 (1) G3-050504-008, Revision D, dated 12/30/2009 (1) Rev. A 4/2/2010 4 Cessna 340 /340A 3A25 CFR Part 23 as Listed in the TCDS G3-050504-002 Rev. L 08/08/2011 (1) G3-050504-008, Revision E, dated 02/15/2012 (1) Rev. B 3/26/2012 5 Cessna 335 3A25 CFR Part 23 as Listed in the TCDS G3-050504-002 Rev. M 10/08/2012 (1) G3-050504-008, Revision E, dated 02/15/2012 (1) Rev. C 11/16/2012 6 Piper PA-31, PA-31-300, PA-31-325, PA-31-350 A20SO CFR Part 23 as Listed in the TCDS A23SO for PA-42 G3-050504-002 Rev. O 05/01/2017 (1) G3-050504-008, Revision G, dated 05/01/2017 (1) Rev. D 11/28/2017 7 Piper PA-31P, PA-31T, PA-31TI, PA-31T2 A8EA CFR Part 23 as Listed in the TCDS A23SO for PA-42 G3-050504-002 (1) Rev. O 05/01/2017 (1) G3-050504-008, Revision G, dated 05/01/2017 Rev. D 11/28/2017 8 Piper PA-42, PA-42-720, PA-42-1000 A23SO CFR Part 23 as Listed in the TCDS A23SO G3-050504-002 Rev. O 05/01/2017 (1) G3-050504-008, Revision G, dated 05/01/2017 (1) Rev. D 11/28/2017 Page 1 of 2 SA01935LA Aircraft Performance Modifications For Installation of External Aft Body Strakes Note: (1) Or later FAA Approved Revision. FAA Approval: _________________________________ Todd G. Dixon Manager, Denver ACO Branch Compliance and Airworthiness Division Page 2 of 2 REVISION DATE DESCRIPTION IR 8/14/2009 Initial Release A 4/2/2010 Addition of Cessna 404 to AML B 3/26/12 Addition of Cessna 340 / 340A to AML. Rev. L MDL G3-050504-002 C 11/26/12 Addition of Cessna 335 to AML. Rev. M MDL G3-050504-002 D 11/28/2017 Addition of Piper PA-31 and PA-42 models to AML Rev O MDL G3-050504-002 ## Every issue (4) - November 28, 2017: Amended, Current. [certificate](https://openairdocs.org/files/sha256/dd/4e/dd4ec1903824299e3e916702ef611c07b28630e8d1244c8a7862dc6278f94466), [SA01953LA_AML.pdf](https://openairdocs.org/files/sha256/7e/a6/7ea676a801dd04ccc10e03f81fac4bc146bdde0479bebb341a1a0594d2b7af97) - August 14, 2009: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/fb/10/fb104ff5d458a3cc6d7819f099f7dc5f0d91f1863c394db4a054482ba8deb624) - April 17, 2007: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/d0/79/d0790e8c30c1bd3fc0fac57cbdc5238bde133cbf3942529e56c6aba6b94640e0) - February 5, 2007: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/a0/5b/a05b229b49ccba42641b841c3ec06fcafd5cd9b5975d7f5022a3b161c7a78be9) --- 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.