# STC SA4629NM - Type: Supplemental type certificate - Status: Current, Reissued - Holder: Northern Piper Aviation Inc., United States - Description: Fabrication of Model 8400 brake booster assemblies, and modification of Scott Aviation Model B-711 brake master cylinders by installation of said assemblies. - Applied: March 20, 1985 - Status date: January 26, 2006 - Product: Aircraft, Single-Engine - Certification basis: Part 21 - Data sheets: [TCDS A-691](https://openairdocs.org/tcds/A-691) - Certificate PDF: https://openairdocs.org/files/sha256/f1/71/f171f2e4219d925a1546ff6c1b7e3dae49f53f92cefe6a86f1fb55c6f9c93728 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FE1A1D0CA2F14DB8862571090050AB1C.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA4629NM ## ADs that name it (0) None. ## Approved models (4) - The New Piper Aircraft Inc. J3C-40 ([TCDS A-691](https://openairdocs.org/tcds/A-691)) - The New Piper Aircraft Inc. J3C-50 ([TCDS A-691](https://openairdocs.org/tcds/A-691)) - The New Piper Aircraft Inc. J3C-65 (Army L-4; L-4A; L-4B (Navy NE-1); L-4H; L-4J (Navy NE-2)) ([TCDS A-691](https://openairdocs.org/tcds/A-691)) - The New Piper Aircraft Inc. PA-11 ([TCDS A-691](https://openairdocs.org/tcds/A-691)) ## 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. 6041 Mackay Street Suite 102 Anchorage, AK 99518 Part 4a* of the Civil Air Regulations. * Complete certification basis is specified in Aircraft Specification No. A-691, Revision 31 Original Product Type Certificate Number: A-691 Piper Make: Model: J3C-40, J3C-50, J3C-65(Army L-4, L-48, L-4H, L-4J; Navy NE-1, NE-2), PA-11 Description of Type Design Change: Fabrication of North River Aviation Model 8400 brake booster assemblies, and modification of Scott Aviation Model B-711 brake master cylinders by installation of said assemblies, both in accordance with North River Aviation, Inc., Drawing List No. 84-100, revised April 17, 1993, or later FAA approved revision. Limitations and Conditions: The approval of this change in type design applies to the basic Piper J3C-40, J3C-50, J3C-65(Army L-4, L-48, L-4H, L-4J; Navy NE-1, NE-2), PA-11 airplanes that have been equipped with Scott Aviation Model B-711 brake master cylinders, FAA approved high-pressure brake lines, and with brakes FAA approved for a maximum available hydraulic pressure of at least 1698 PSI, only. (See Continuation of Limitations and Conditions on Page 3 of 3) Date of application: March 20, 1985 Date of issuance: June 29, 1990 Date reissued: July 19, 2004; January 26, 2006 Date amended: July 19, 2004; January 26, 2006 ( Signature) Gregory J. Holt Manager Anchorage Aircraft Certification Office (Title) FAA Form 8110-2-1(10-69) Page 3 of 3 Number SA4629NM Date reissued: July 19, 2004; January 26, 2006 Date amended: July 19, 2004; January 26, 2006 Limitations and Conditions (Continued) This approval should not be extended to other aircraft of these models on which other previously approved modifications are incorporated, unless it is determined by the installer that the modification will introduce no adverse effect on the airworthiness of such aircraft. FAA approved high-pressure brake lines, under the meaning of this Certificate, are brake lines which the FAA has found to be sufficiently flexible for their intended purpose, compatible with MIL-H-5606BB (red) hydraulic fluid, and capable of sustaining an ultimate internal hydraulic pressure of at least 2547 PSI for at least 3 seconds without failure or leakage; and which the FAA has approved for installation on the airplane. The modification approved by this Certificate is also eligible on Piper J3C-50S, J3C-65S, AND pa-11S airplanes that have been converted to landplanes in accordance with FAA approved data. 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. -- END -- ## Every issue (1) - January 26, 2006: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/f1/71/f171f2e4219d925a1546ff6c1b7e3dae49f53f92cefe6a86f1fb55c6f9c93728) --- 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.