What is the PT6E-67XP engine's TBO (Time Between Overhaul)?

• A. 3,000 hours
• B. 5,000 hours
• C. 7,000 hours
• D. 10,000 hours

Answer: (B)

TBO is the manufacturer’s recommended interval between complete engine overhauls, based on expected life of major rotating parts and hot-section components under normal operation. For the PT6E-67XP used in the PC-12 NGX, that published interval is 5,000 flight hours. This longer life reflects the engine’s advanced design, materials, and FADEC-controlled operation, which optimize wear and performance between major overhauls. Operators follow this 5,000-hour figure unless an approved maintenance program or extension is provided. While inspections and specific component wear checks occur along the way, the overhaul recommendation remains 5,000 hours.