As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAKEOFF-INITIAL CLIMB, RT PACK OFF EICAS AND ON OVERHEAD PANEL. REPEAT PACK PROBLEM. RT PACK FLOW CONTROL VALVE. REPLACED VALVE. NO HELP. SUSPECT BAD VALVE FROM STOCK. CLEARED EICAS MESSAGE. WHEN PACK WAS TURNED ON RT PACK BITE MESSAGE RETURNED. CHECKED CONTROLLER, FAULTS FLOW CONTROL VALVE. SWAPPED CONTROLLERS NO HELP. SWAPPED FLOW CONTROL CARD, NO HELP. REPLACED FLOW CONTROL VALVE IAW MM. RT PACK OPS CHECKED GOOD. PREVIOUS FLOW CONTROL VALVES BAD FROM STOCK.