# STC SA1431NM - Type: Supplemental type certificate - Status: Current, Reissued - Holder: General Aviation Modifications Inc., United States - Description: Installation of a Shadin 910502 or 910514 'Digiflo' digital fuel flow indicator system. - Applied: April 1, 1981 - Status date: February 28, 2020 - Product: Aircraft, Small Airplane - Certification basis: Part 3, Part 21 - Data sheets: [TCDS A1EA](https://openairdocs.org/tcds/A1EA) - Certificate PDF: https://openairdocs.org/files/sha256/93/73/9373a07ba3d5a9bba80691b72925e37d23afbe7c6a78bb32dadfed426f378e53 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/1C54B185514C64CF862586E80048DB12.0001 - DRS record last changed: December 5, 2025 - Page: https://openairdocs.org/stc/SA1431NM ## ADs that name it (0) None. ## Approved models (2) - Piper Aircraft Inc. PA-30 ([TCDS A1EA](https://openairdocs.org/tcds/A1EA)) - Piper Aircraft Inc. PA-39 ([TCDS A1EA](https://openairdocs.org/tcds/A1EA)) ## 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. 2800 Airport Road, Hangar A Ada, Oklahoma 74820 P art 3 of the Civil A ir R egulations . . Original Product Type Certificate N umber : M ake : M odel : AE1A Piper PA-30, PA-39 Description of Type Design Change: Installation of a Shadin 910502 or 910514 “Digiflo” digital fuel flow indicator system and optional removal of the fuel pressure indicating system on Piper Model PA-30 and PA-39 airplanes equipped with Lycoming Model IO-320-B1A and LIO-320-B1A, or IO-320-C1A and LIO-320-C1A engines in accordance with FAA Approved CAPCO Report No. 1, dated December 10, 1981, or later FAA approved revisions. Aircraft modified by this STC must be operated in accordance with FAA Approved Airplane Flight Manual Supplement (AFMS) appropriate to either the 910502 or 910514 installations, dated November 30, 1981, and February 7, 1983, respectively, or later FAA approved revisions. This approval should not be extended to other specific airplanes of these models on which other previously app roved 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. Approval of this change in type design applies to the above model aircraft only. A copy of this certificate, and the appropriate AFMS 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 : April 1, 1981 Date of issuance : November 30, 1981 Date reissued : March 1, 1988, February 28, 2020 Date amended : February 7, 1983, February 25, 1983 B y direction of the A dministrator (Signature) Manager, Technical & Administrative Support Section Los Angeles ACO Branch (Title) ## Every issue (1) - February 28, 2020: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/93/73/9373a07ba3d5a9bba80691b72925e37d23afbe7c6a78bb32dadfed426f378e53) --- 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.