P/N: CFM56-7-B27/83 S/N: .4S$144.$' IC )li) the top aft location on the thrust reverser inner surface, as per AMM Subtask 71-00-02-420-016-F00. E. De-preserve the Engine (if the engine preservation procedure has been done), as per AMM Task 71-00- 03-600-803-F00. F. Carry out Bleed Air Check Valve Inspecti