As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SUPPLEMENTAL AT 36000 CABIN ALTITUDE WENT TO 10000 GOT A MASTER WARNING. C/A-DEFERRED PRESSURIZATION CONTROL SYS AUTOMATIC MODE (M) CW. MEL 21-17 AUTH 100429DM-C. FOUND BONDING JUMPER TO BE BROKEN AND STUCK IN ELECTRO-PNEUMATIC OUTFLOW VALVE. R&R BONDING JUMPER IAW AMM 20-13-21. OPC GOOD IAW AMM 21-31-00. MEL ITEM RESTORED.