As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE AT CRUISE ALTITUDE WITH BLEED 2 ON MEL, CREW RECEIVED A BLEED 1 LEAK MESSAGE. CREW FOLLOWED QRH ITEMS WITH NO RESULTS AND CABIN ALTITUDE STARTED TO SLOWLY RISE. CREW COMMENCED AN EMERGENCY DESCENT TO 10,000 FEET AND DECLARED AN EMERGENCY. BY THIS TIME THE CABIN ALTITUDE WAS BACK TO A NORMAL SITUATION AND CREW ELECTED TO BURN OFF FUEL TO AVOID AN OVER WEIGHT LANDING. CREW LANDED WITHOUT INCIDENT. MAINTENANCE FOUND THE NR 1 NAPRSOV LEAKING AND REMOVED AND REPLACED THE NR 1 NAPRSOV AND THE NR 2 NAPRSOV GASKET PER EMB AMM AND OPS CHECKED GOOD.