What was found
PDIS 639 21-30 1698241 27SEP18 IAD CLOSE IN CLIMB AT APROZ 15000 FEET CABIN ALTITUDE REACHED ORANGE. HANUAL IMPUT HAD ON EFFECT ALL PRESSURIZATION INDICATIONS WERE DASHES ONCE ON GROUND CREW WAS UNABLE TO OPEN PAX DOOR. CB F8 WAS CYCLED WHICH RELEASED PRESSURIZATION HISTORY: NO, ACFT DIVERTED AND DECLARED EMERGENCY MEL 27SEP18 08:00 IAD C27005 21-10-3 PRESS CONTROL AUTO MANUAL FACT 28SEP18 09:32 MDT REACTIVATED PRES. CONTROL SYSTEM REF 21-31-03.OPS CHECKED IN MAN AND AUTO MODE REF 21-31-00 OPS CHECK FAILED.TROUBLESHOT REF FIM 21-31-00-810-803A TO BLOCK 14.R&RD ELEC. OUTFLOW VALVE OPS/LEAK CHECK GOOD.AUTO PASSED MAN FAILED.R&RD PNEUMATIC OUT FLOW VALVE.OPS/LEAK CHECK GOOD.AUTO PASSED.MAN PASSED.REF 21-30-04&21-31-03 PER EMB145 AMM.OK FOR SERVICE