Know your PT6A - Pratt & Whitney Canada

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Hot Section Inspection A Hot Section Inspection (HSI) is usually done halfway through the basic TBO interval or when performance loss dictates. This involves splitting the engine between the compressor and power turbines at “C” Flange. Since it is generally not necessary to remove the engine from the aircraft during an HSI, the inspection procedure is both simple and fast. 33
Overhaul The basic Time Between Overhaul (TBO) and Hot Section Inspection (HSI) interval is published in the appropriate Service Bulletin for each <strong>PT6A</strong> engine model. Under extreme conditions, maintenance action prior to the recommended overhaul life may be necessary. The TBO interval depends on the specified operation of the engine. The interval can be escalated incrementally with the approval of <strong>your</strong> airworthiness authority, using an “on-condition” or a sampling program. The current TBO escalation is limited at 8,000 hours for single-engine aircraft and 10,000 hr to 12,500 hr, for twin-engine aircraft, depending on the application. TBO escalation recommendations take into account the average effect of flight duration, time at a given power level, climate, environment, maintenance practices, utilization and engine hardware standard. 34
Page 1 and 2: Key NEW OWNER WISDOm YOUR PT6A turb
Page 3 and 4: Know your pt6A turboprop Should you
Page 6 and 7: Disclaimer Disclaimer The informati
Page 8 and 9: Nomenclature Np PPSP PLA POH PT RPM
Page 10 and 11: Know your pt6A turboprop Once we ha
Page 12 and 13: Modularity The design of the PT6A e
Page 14 and 15: Principles of Operation The PT6A en
Page 16 and 17: Power Train A shaft connects the po
Page 18 and 19: FOD Protection Inertial Separator T
Page 20 and 21: Oil System The PT6A engine has a se
Page 22 and 23: Controls Cockpit Powerplant Control
Page 24 and 25: CONTROLS Propeller Overspeed Govern
Page 26 and 27: Scheduled Maintenance The following
Page 28 and 29: Oil System Inspection and Servicing
Page 30 and 31: Performance Check Over the life of
Page 32 and 33: Engine Washing External Engine Wash
Page 36 and 37: Cycle Counting Certain rotating com
Page 38 and 39: Engine Condition Trend Monitoring®
Page 40 and 41: Recommended PT6A Engine Power Manag
Page 48: P&WC Customer FIRST Centre Global C

Know your PT6A - Pratt & Whitney Canada

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