What was found
PASSING THROUGH 10,000 FT, RECEIVED CABIN ALT ALERT. DESCENDED TO 10,000. ACFT WOULD NOT PRESSURIZE IN AUTO WITH REGULATORS NR 1, NR 2 OR IN MANUAL POSITION. ALL DOORS & OUTFLOW VALVES INDICATED, SHOWED CLOSED. FOUND NR 2 CABIN PRESSURE CONTROLLER FAULTING AT WARN CKT STEP. REPLACED NR 2 CABIN PRESSURE CONTROLLER PER AMM 21-31-11-04 OPS WAS NORMAL PER MOCC.