What was found
CABIN ALTITUDE EICAS MSG WARNING. PERFORMED EMERGENCY DESCENT TO 10,000 FT @ FL330, DIFF PSI 60-7.0, CABIN ALT 10000-11000 FT. NOTED OUTFLOW VALVE WAS APPROX HALF OPEN, NO CHANGE W/ AUTO 2 OR AUTO 1, WAS A SLOW RATE DECOMPRESSION.(<P>PERFORMED BITE TEST OF CABIN PRESSURE AUTO CONTROLLER IAW AMM 21-31-00. FOUND LOW INFLOW FAULT. R/R OUTFLOW VALVE IAW AMM 21-31-03 & IPC 21-31-03. OPS CHK GOOD. R/R CABIN PRESSURE AUTO CONTROLLER 2 IAW AMM 21-31-02 & IPC 21-31-02-03. OPS CHK OK. C/W AP 34620.</P> / <P> </P> / <P>OUTFLOW VALVE P/N 606832-21 S/N 124-2005</P> / <P>AUTO PRESSURE CONTROLER 2 P/N 2117388-6 S/N 59-1772</P>)