Narrative:

During climb out; bleed 2 overheat indication. Followed aom; now operating in a single bleed operation. Warning extinguished. When we received this warning we were operating in icing conditions and when we climbed above 10000 ft we were in the clear and had exited icing. Aom referred us to single bleed operation in icing conditions. The note at the top of the procedure referred to a bleed leak indication which we did not have. We were not in icing conditions while en route. The procedure does not indicate that we will have a decrease in performance of the anti-ice system and that we should not enter or should use caution. During descent; received another warning 'ice condition/anti-ice inoperative' followed by associated messages 'stabilizer anti-ice fail' and 'wg anti-ice fail.' we elected to climb back up above the icing to approximately 11000 ft to work through this problem. The messages remained for quite some time even with the thrust levers advanced. At some point during cruise the message extinguished. Followed aom ice condition; anti-ice inoperative procedure and at this point we were to avoid and exit icing conditions. Diverted to nearest suitable airport.

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Original NASA ASRS Text

Title: EMB145 FLT CREW HAS FAILURE OF THE #2 BLEED AIR SOURCE. DURING APCH IN ICING CONDITIONS; EICAS WARNING 'WING ANTI-ICE FAIL' ILLUMINATES; FLT CREW CLBS ABOVE ICING CONDITIONS AND DIVERTS TO VFR ARPT.

Narrative: DURING CLBOUT; BLEED 2 OVERHEAT INDICATION. FOLLOWED AOM; NOW OPERATING IN A SINGLE BLEED OP. WARNING EXTINGUISHED. WHEN WE RECEIVED THIS WARNING WE WERE OPERATING IN ICING CONDITIONS AND WHEN WE CLBED ABOVE 10000 FT WE WERE IN THE CLR AND HAD EXITED ICING. AOM REFERRED US TO SINGLE BLEED OP IN ICING CONDITIONS. THE NOTE AT THE TOP OF THE PROC REFERRED TO A BLEED LEAK INDICATION WHICH WE DID NOT HAVE. WE WERE NOT IN ICING CONDITIONS WHILE ENRTE. THE PROC DOES NOT INDICATE THAT WE WILL HAVE A DECREASE IN PERFORMANCE OF THE ANTI-ICE SYS AND THAT WE SHOULD NOT ENTER OR SHOULD USE CAUTION. DURING DSCNT; RECEIVED ANOTHER WARNING 'ICE CONDITION/ANTI-ICE INOP' FOLLOWED BY ASSOCIATED MESSAGES 'STABILIZER ANTI-ICE FAIL' AND 'WG ANTI-ICE FAIL.' WE ELECTED TO CLB BACK UP ABOVE THE ICING TO APPROX 11000 FT TO WORK THROUGH THIS PROB. THE MESSAGES REMAINED FOR QUITE SOME TIME EVEN WITH THE THRUST LEVERS ADVANCED. AT SOME POINT DURING CRUISE THE MESSAGE EXTINGUISHED. FOLLOWED AOM ICE CONDITION; ANTI-ICE INOP PROC AND AT THIS POINT WE WERE TO AVOID AND EXIT ICING CONDITIONS. DIVERTED TO NEAREST SUITABLE ARPT.

Data retrieved from NASA's ASRS site as of January 2009 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.