# STC SE000EN - Type: Supplemental type certificate - Status: Current, Reissued - Holder: MORE Company Inc, United States - Description: Engines will be maintained IAW 'Maintenance or Reliable Engines(MORE) Program,' Rev 4, dated 8/16/95. - Applied: October 24, 1992 - Status date: October 4, 2022 - Product: Engine - Certification basis: Part 21, Part 33 - Data sheets: [TCDS E4EA](https://openairdocs.org/tcds/E4EA) - Certificate PDF: https://openairdocs.org/files/sha256/6e/3a/6e3a97b188b549e16007967beb5307ebf1de7fb9ad2a7fd5dba2c9aa0aaf81f2 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID165501654420221012152310.0001 - DRS record last changed: February 25, 2026 - Page: https://openairdocs.org/stc/SE000EN ## ADs that name it (0) None. ## Approved models (3) - Pratt & Whitney Canada, Inc. PT6A-21 ([TCDS E4EA](https://openairdocs.org/tcds/E4EA)) - Pratt & Whitney Canada, Inc. PT6A-27 ([TCDS E4EA](https://openairdocs.org/tcds/E4EA)) - Pratt & Whitney Canada, Inc. PT6A-28 ([TCDS E4EA](https://openairdocs.org/tcds/E4EA)) ## 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 AviationAdministration Supplemental Type Certificate Number: SE000EN This certificate issued to: MORE Company, Inc. 5395 Mountain Creek Court Reno, NV 89511 33 of Federal Aviation Regulations . E4EA Make: Pratt & Whitney Canada Model: PT6A-21, PT6A-27, PT6A-28 Description of Type Design Change: Instructions for Continued Airworthiness for the PT6A-21, PT6A-27 and PT6A-28 engine models that define specific maintenance tasks and their associated maintenance schedules, and that are used as a supplement to the applicable Pratt & Whitney Canada manuals. Use of these Instructions for Continued Airworthiness provides for the extension of hot section inspection (HSI), and time between overhaul (TBO) intervals, and supersedes the need for compliance with the HSI and TBO intervals (Continued on page 3) Limitations and Conditions: PT6A-21, PT6A-27 and PT6A-28 engines using this Supplemental Type Certificate will be maintained in accordance with Revision 6 of the Maintenance on Reliable Engines (MORE) Instructions for Continued Airworthiness, dated February 18, 2019. (Continued on page 3) Date of Application: October 24, 1992 Date Reissued: October 4, 2022 Date of Issuance: May 13, 1993 Date Amended: December 22, 2000 Manager, ECO Branch, Section B United States of America Department of Transportation Federal AviationAdministration Supplemental Type Certificate Number: SE000EN United States of America Department of Transportation Federal AviationAdministration Supplemental Type Certificate (Continuation Sheet) Number: SE000EN Description of Type Design Change (Continued): defined in Pratt & Whitney Canada PT6A Service Bulletin Number 1803 latest revision. The rotor component service lives defined in Pratt & Whitney Canada PT6A Service Bulletin Number 1002, latest revision, are to be complied with, and are not superseded by the module repair intervals defined in the MORE Program. 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, the holder shall give the other person written evidence of that permission. ## Every issue (2) - October 4, 2022: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/6e/3a/6e3a97b188b549e16007967beb5307ebf1de7fb9ad2a7fd5dba2c9aa0aaf81f2) - March 3, 2009: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/b2/29/b229553feb5f9f05ae292de11a4324755a631032177e3ded03e0a3b4e57be2b4) --- 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.