The More Supplemental Type Certificate for an 8000 Hour TBO is equivalent to the Pratt Whitney Canada Type Certificate for a 3600 Hour TBO. Source (FAA SAIB: NE-08-40).
The MORE STC’s cover 31 PT6A engine models, and the MORE Non-STC Version (ICA) cover all PT6A-60 series engine models.
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.
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