Hot Section Inspection Interval Also Lengthened
Pratt & Whitney Canada has announced the extension of the basic Time Between Overhaul (TBO) and Hot Section Inspection (HSI) intervals for in-service and future PT6A-140, -140A and -140AG engines. The TBO is increasing to 4,000 from 3,600 hours, while the HSI interval is extended from 1,800 to 2,000 hours. These improvements will benefit general aviation operators by increasing flying time and decreasing maintenance costs.