AN MD11 ON CLBOUT AT 3000 FT IN ICING DECLARED AN EMER AND DIVERTED DUE TO L WING ANTI-ICE 'DISAGREE' LIGHT; FOLLOWED BY STICK SHAKER AND STALL WARNING. THEN #1 MANIFOLD FAIL AND L BLEED AIR FAULT WARNING ILLUMINATED.

Narrative

DEPARTING RWY 32; WX RPTED AS 25 FEW 45 OVCST -7/-10. ON CLBOUT; PASSING APPROX 1500 FT AGL; A 'WING ANTI-ICE L DISAGREE' LIGHT ILLUMINATED IN THE COCKPIT. WE ENTERED THE CLOUDS AT APPROX 2000 FT AGL AS WE CONTINUED TO CLB OUT; TO A SAFE ALT. AT 3000 FT; FLAP RETRACTION WAS INITIATED; FOLLOWED BY THE STICK SHAKER; AND STALL WARNING INDICATION. THE CAPT IMMEDIATELY HAD ME ADVISE ATC THAT A DSCNT TO 2000 FT WAS REQUIRED TO COMPLETE THE STALL WARNING RECOVERY; AND EXIT THE POSSIBLE ICING CONDITIONS (2000 FT WAS THE LAST KNOWN ALT THE CAPT FELT WAS CLR OF CLOUDS). DURING THE RECOVERY; A #1 MANIFOLD FAILURE (RED LIGHT) WAS OBSERVED ON THE OVERHEAD PANEL; ALONG WITH A BLEED AIR #1 FAULT. THE CAPT DIRECTED THE RELIEF PLT AND JUMP SEATER TO GET OUT THE CHKLIST AND DETERMINE OUR PROB. AT 2000 FT; WE WERE STILL NOT CLR OF CLOUDS; THE STALL WARNING AND STICK SHAKER HAD JUST STOPPED; SO HE CONTINUED A DSCNT TO DEPART THE IMC CONDITIONS. WE INITIALLY WENT DOWN TO 1200 FT AGL MOMENTARILY; AND THEN ON ADVICE FROM ATC; FOUND 1500 FT AGL AN ACCEPTABLE ALT. ATC WAS ADVISED THAT FUEL DUMPING WAS REQUIRED; AND A REQUEST WAS MADE FOR A HOLDING PATTERN TO DUMP GAS. ENRTE TO THE HOLDING POINT; CHKLISTS WERE RUN TO RECTIFY OUR AIR MALFUNCTION; AND THE CAPT DETERMINED THAT IN THE INTEREST OF SAFETY OF FLT; WE SHOULD REMAIN CLR OF THE CLOUDS AND CLR OF ANY POSSIBLE ICING CONDITIONS. AFTER DUMPING FUEL TO OUR MAX GROSS LNDG WT; WE REQUESTED FROM ATC; AND WERE GIVEN RADAR VECTORS FOR AN ILS APCH AND LNDG ON RWY 6R. A 35 DEG FLAP LNDG WITH MINIMUM AUTOBRAKES WAS COMPLETED WITHOUT INCIDENT; A COMPLETE WRITE-UP WAS MADE IN THE FLT LOGBOOK; AND THE ACFT TURNED OVER TO MAINT. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE TECHNICIAN AT HAD CLRED THE INBOUND DEFERRED ITEM ON THE L WING 'DISAGREE' WARNING WITH A STATEMENT IN THE LOGBOOK THAT OP OF THE AIR SYS WAS TO BE IN MANUAL MODE. THE RPTR SAID THE AIR SYS ON THIS AIRPLANE HAS BEEN A CHRONIC PROB FOR ALMOST 1 YR. THE RPTR STATED THE ENVIRONMENTAL CTLR WAS AGAIN REPLACED BUT IS NOT SURE IF IT FIXED THE PROB AS THE CREW LEFT THE AIRPLANE IN ZZZ. CALLBACK CONVERSATION WITH RPTR ACN 601074: THE RPTR STATED THE MAINT ACTION TAKEN AT ZZZ IS UNKNOWN. THE RPTR STATED THE AIRPLANE WAS OTS FOR MAINT AND NO DETAILS WERE RELEASED BY MAINT. SUPPLEMENTAL INFO FROM ACN 601074: PRIOR TO DEP THERE WAS 2 COMPLETE EXAMINATIONS OF THE ACFT TO DETERMINE IF DEICING WAS NEEDED; THERE WAS NO ICE ON THE ACFT. THE L WING ANTI-ICE DISAGREE HAS A LONG HISTORY OF OCCURRENCE AND HAS BEEN WRITTEN UP SO IN THE ACFT MAINT LOG.