Maintenance information available from Pilatus at Pilatus-Aircraft.com - customer support, Publications - PC12, Maintenance: Chapter 4 Airworthiness Limitations and Chapter 5 Scheduled / Unscheduled Maintenance

The following link is the the Pratt & Whitney Canada "Know Your PT-6A"

information booklet, refer to pages 27-32

Engine Oil System Inspection/Engine Washing

Service and authorized satellite support centers

Sales-Used PC12's

All Authorized Pilatus Sales/Service Centers