Staying updated with the latest technical manual changes is crucial for ensuring safety and efficiency in aviation maintenance. Recent updates to the Pratt & Whitney Canada manuals, specifically the PT6A-34AG Manual 3021242 Issue 72.0 and the PT6A-34AG Overhaul Manual 3021243 Revision 51, bring significant changes that mechanics and operators need to be aware of.
Key Updates:
1. Prop Strike and Sudden Stoppage Inspection:
Pratt & Whitney Canada has introduced detailed descriptions and decision trees to determine the maintenance level required for prop strikes and sudden stoppages. This includes factors such as the speed at which the propeller struck an object and the type of object struck.
2. Service Information Letter (SIL) Gen-135:
Completion of SIL Gen-135 is now a crucial first step in the inspection process for prop strikes and sudden stoppages. This report helps repair shops determine the necessary steps to get the engine back in operation safely.
3. Power Section Overhaul Requirements:
The overhaul manual now mandates a full overhaul level of inspection for almost all components of the power section, including non-destructive testing and measuring. Notably, the propeller shaft and the #5 bearing are now automatically discarded, which could increase repair costs and lead times.
4. Test Cell Run Requirement:
After repairing the power section, a test cell run is required unless waived by engineering, which reviews the replaced parts before determining the necessity of the test.
Robert Craymer, with over three decades of experience on PT6A engines and PT6A-powered aircraft, including 25+ years at Covington Aircraft, emphasizes the importance of understanding these updates. As a licensed A&P mechanic and an instructor of PT6A Maintenance and Familiarization courses, Robert highlights the potential cost-saving measures available through Pratt & Whitney Canada’s network and encourages discussions with Designated Overhaul Facilities or Field Service Managers regarding prop strikes.
For more detailed insights and guidance, reach out to Robert Craymer at [email protected] or 662-910-9899.
Stay informed and ensure your maintenance practices align with the latest standards to keep your operations safe and efficient.
Read the full text on our blog for an in-depth analysis of these updates and their implications for your maintenance operations.
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