What is the TBO of a PT6 engine?
While the basic TBO for PT6T-3B and PT6T-3DF engines is 4,000 hours, it varies for each model and can be higher or lower. For the PW206 and PW207 series engines, the overhaul interval varies between 3,500 hours and 4,000 hours, depending on the engine’s configuration. Key Maintenance Intervals for PT6A Engines 100-Hour Inspections. Hour Inspections. Hour Hot Section Inspections.