What was found
EICAS RIGHT PACK TEMP. FOUND APU BLEED DUCT PRESSURE TO BE 8 PSI ON LEFT AND 10 PSI ON RIGHT. BITE CHECK OF APU ECU MINI FLAG 3 & 6. FAULTY APU SURGE CONTROL VALVE. REMOVED AND REPLACED APU SURGE CONTROL VALVE AND REMOVED AND REPLACED BELLOW SEAL, AFT OF APU SURGE CONTROL VALVE. REMOVED AND REPLACED RIGHT PACK TEMP SENSOR IAW AMM 49-53-01 AND AMM 21-51-18-402. PACK TEMP TEST, OPS CHECK GOOD IAW AMM 21-51-18-702. APU BLEED PRESSURE GOOD. NO FAULTS NOTED AT THIS TIME.