What was found
APU CT5ATP EGT HAS SHIFTED ABOVE THE 593 DEGREE THRESHOLD AND REMAINS BELOW THE 605 THRESHOLD. ERRONEOUS INLET TEMP OR PRESSURES ARE SUSPECT. GROUNDED - YES. REMOVED AND REPLACED APU INLET TEMP SENSOR REF B7237-900 AMM 49-61-31. DURING INSTALL OF CANNON PLUG P21, GROUND WIRE TERMINAL BROKE OFF OF BACKSHELL. REMOVED AND REPLACED GROUND WIRE TERMINAL ON BACKSHELL OF CONNECTOR P21 REF SWPM 20-30-11. REMOVED INLET PRESSURE SENSOR REF AMM 49-52-31 AND INSPECTED ORIFICE W/ NO DEFECTS NOTED. ALSO APPLIED PRESSURIZED AIR TO ORIFICE W/ NO DEFECTS NOTED. REINSTALLED INLET PRESSURE SENSOR REF AMM 49-52-31. APU BITE AND OPS CHECK GOOD.