As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT FROM SAL TO PTY THE AIRCRAFT DIVERT TO MGA DUE TO EICAS MESSAGE CAB ALT HI EMERGENCY DESCEND MEMORY ITEM. AT MGA STATION PERFORMED TASK CARD IAW AMM 21.31.01 REMOVAL AND REPLACED CPCS AND PERFORMED OPERATIONAL TEST IAW AMM 21.30.00.720.801.A WAS PERFORMED CABIN PRESSURIZATION LEAKAGE TEST IAW AMM TASK CARD 21.31.00.720.802.A THE AIRCRAFT RETURN TO NORMAL OPERATION.