# STC SA01248SE - Type: Supplemental type certificate - Status: Current, Reissued - Holder: Blackhawk Modifications Inc., United States - Description: Installation of two Hartzell HC-E4N-3N/D8990SB propellers. - Applied: July 8, 2003 - Status date: June 7, 2007 - Product: Aircraft, Small Multi-Engine - Certification basis: Part 3, Part 21 - Data sheets: [TCDS A8EA](https://openairdocs.org/tcds/A8EA) - Certificate PDF: https://openairdocs.org/files/sha256/b4/43/b44336fe1a97f15c6731584bef692308c7245bd513a4a5a55480da361ab329f8 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/959E7A9F6A52E06B86257305006195F5.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA01248SE ## ADs that name it (0) None. ## Approved models (2) - Piper Aircraft Inc. PA-31T ([TCDS A8EA](https://openairdocs.org/tcds/A8EA)) - Piper Aircraft Inc. PA-31T1 ([TCDS A8EA](https://openairdocs.org/tcds/A8EA)) ## 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. United States of America Department of Transportation_Federal Aviation Administration Supplemental Type Certificate Number SA01248SE This certificate, issued to Blackhawk Modifications, Inc. 1800 East Sahara Drive Las Vegas, NV 89104 Part 3 of the Civil Air Regulations. Original Product⎯Type Certificate Number: A8EA Make: Piper Model: PA-31T, PA31T1 Description of the Type Design Change: Installation of two Hartzell HC-E4N-3N/D8990SB propellers in accordance with Aircraft Restoration Corporations Installation Instructions Report 158-4b, dated June 30, 2003, or later FAA approved revision of this document. 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 this model 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. A copy of this Certificate, and the Aircraft Flight Manual Supplement AFMS-158P, Revision IR, dated July 28, 2003, or later FAA approved revision to this document, must be maintained as part of the permanent records of 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: July 8, 2003 Date reissued: June 7, 2007 Date of issuance: July 28, 2003 Date amended: Original signed by Mike Pasion (Signature) Acting Manager, Seattle Aircraft Certification Office (Title) ## Every issue (1) - June 7, 2007: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/b4/43/b44336fe1a97f15c6731584bef692308c7245bd513a4a5a55480da361ab329f8) --- 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.