What was found
TECH SERVICE REQUEST. NR 1 ENG (S/N 896469) HAS HAD AN INCREASE IN OIL PRESSURE. GROUNDED - YES. REMOVED AND REPLACED AFT SUMP OIL SUPPLY TUBE REF. AMM 72-56-00-300-801-F00, NOTE OIL INLET COVER REMOVED TO GAIN ACCESS TO OIL SUPPLY TUBE ON #1 ENGINE. RAN ENGINE FOR LEAK CK OF MCDS NO LEAKS NOTED. PERFORMED 70% N1 RUN AND FOUND OIL PRESSURE WITHIN LIMITS ALSO CK'D OTHER POWER SETTINGS UP TO T/O POWER AND OIL PRESSURE STAYED WITHIN LIMITS, REF AMM 71-00-00-800-806 -F00, NO EXTERNAL LEAKS NOTED ON OIL INLET COVER OIL SUPPLY OR OIL SCAVENGE LINES, ALSO NO RESIDUAL OIL LEAKAGE FROM AFT VENT TUBE.