What was found
AT FL330 APPROX 80 MI SW OF CLT WHEN CABIN BEGAN TO DEPRESSURIZE AND NUMEROUS ALERTS APPEARED ON STATUS PAGE. ALERTS AS / FOLLOWS: VIA FAIL, DCU FAIL, NR 1 FAIL, ILS NR 1 FAIL, GPS NR 1 FAIL, VOR NR 1 FAIL, CABIN PRESS MAN, CABIN TEMP MAN, CKPT TEMP MAN, FUEL QTY FAIL, GPWS FAIL, CABIN ATT / ALERT DESCENDING THROUGH 11,500 FT. MASKS DID NOT DEPLOY. FOUND CPC NR 2 FAIL. REPLACED NR 2 CPC IAW B717 AMM 21-31. RTS PASSED. REPLACED LEFT PCDU DUE TO POWER INTERRUPTION IAW B717 AMM 24-21. REPLACED BOTH MAIN POWER RELAYS ON LEFT PCDU IAW B717 AMM 24-21. ALL RTS TESTS PASSED.