What was found
DUCT PRESSURE DIFFERENTIAL EXCEEDS 20 PSI DURING CLIMB: FL 370 100.1 PERCENT N1 53 DEG C L. 45 PSI R. 22 PSI FL 380 99.7 PERCENT N1 54 DEG C L. 43 PSI R. 22 PSI (CLIMB PWR) FL 380 90.2 PERCENT N1 54 DEG C L. 41 PSI R. 25 PSI (CRUISE PWR). REPLACED NR 2 ENGINE PRECOOLER CONTROL VALVE SENSOR. LEAK CHECKS NORMAL. REF M/M 36-12-03-400-801. REPLACED NR 2 ENGINE 450 DEGREE THERMOSTAT LEAK CHECKS NORMAL. REF M/M 36-11-05-400-801. ACCOMPLISHED REPAIR CONFIRMATION REF FIM 36-10-00-810-807 STEPS G (1) (13), ALL OPERATION TESTS PASS.