What was found
UPPER LEFT TURBINE VALVE AND BLADE COOLING AIR S/O VALVE REMOVED DUE TO FAILURE. LEFT ENGINE REPLACED (UPPER LEFT) TVBC AIR SHUTOFF VALVE OF LEFT ENGINE. REFRENCE AMM TASK 75-25-01-410-801-NR 2 ENGINE DUCT INSTALLATION NEEDS TO BE ACCOMPLISHED, TASK 36-11-01-400-801-002 AND POWER PLANT REFRENCE TEST, TASK 71-00-00-800-801-N00. ROTABLE PARTS CHANGE WAS INDICATED - TT 1390991 SN OFF 9199 VALVE, AY-TBVC OFF 27-7525-9-9002 9199 ON 27-7525-9-9002 1396 INSTALLED HP/IP MANIFOLD. REFRENCE AMM TASK 36-11-01-400-801-002.