What was found
PDIS 415 21-30 0007170 FWD NR 1 OUTFLOW VALVE STUCK IN THE OPEN POSITION (AMBERARROW ON ECAM). NR 1 PRESS REGULATOR IN USE-ECAM SHOWED 0 V/S AND CABIN ALT. AT 260 FT. WHEN SWITCHED TO NR 2 REG. ECAM SHOWED ACTUAL V/S MATCHED A/C CLIMB RATE AND CABIN ALT. EQUALED A/C ALT. NO ECAM IND. THAT OUTFLOW VALVE FAULTED MEL 06AUG04 03:36 BOS R ACN RELEASED FOR SERVICE IAW MEL/CDL: 21-31-04-02-A CATEGORY: C , FACT 09AUG04 20:41 GSO R, REMOVED AND REPLACED REPLACEMENT VLV FOR NR 1 FWD POSITION IAW MM 21-31-12-4-01. TEST NORMAL. (MEL 21-31-04-02-A: OUTFLOW VALVE(S) (IDENTIFY)FWD NR 1, INOP. VALVES DEACTIVATED IN CLOSED POSITION PERFORMED PRESSURIZATION CHECK IAW MM 21-31-00-5-01.