What was found
AT TOP OF DESCENT, CREW ALTITUDE EICAS MSG. CABIN ALT WENT TO 11,000 FT AFTER DESCENT TO 8000 FT, CABIN PRESS DIFF WAS 0.(<P>FOLLOWED FIM FOR CABIN ALTITUDE BITE CHECK PER FIM 21-31-00. FOUND CABIN ALT CONTROLLER 2 FAULT LOW FLOW. THEN FOLLOWED AMM 36-23-00 AIR SUPPLY CONT SYS BITE, WHICH TESTED GOOD. GOOD PRESSURE CHECK PER AMM 05-51-21. </P> / <P>LP 1727920: CABIN ALT CONTROLLER 2 WORKS NORMAL IN MANUAL MODE. PLACED AUTO MODE ON MEL. R & R AUTO PRESS UNIT ASSY IAW AMM 21-31-00-001. BITE & OPS TEST OK, NO REPORTS NOTED IAW AMM 21-31-00-705-001. PLACARDS REMOVED.