As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
JFK - FLT 4775 - AFTER TAKEOFF, CREW REPORTED THE AIRCRAFT WOULD NOT PRESSURIZE BOTH PACKS AND CIRCUIT BREAKER B-8 WERE RESET BY CREW WITH NO EFFECT. CABIN RATE WOULD GO FROM -200 TO -1950 THEN TO AMBER DASHES. MAINTENANCE FOND THE APU BLEED 'Y' DUCT CRACKED. DUCT WAS REPLACED IAW EMB MM. OPERATIONAL CHECK WAS GOOD AND AIRCRAFT WAS RETURNED TO SERVICE. (M)