EMB ERJ 145 ER/LR
Flight Crew Air Transport Pilot (ATP)
Aircraft Equipment Problem Critical; Inflight Event / Encounter Weather / Turbulence
Flight Crew Landed As Precaution; Flight Crew Returned To Departure Airport; General Declared Emergency; General Maintenance Action
Aircraft; Weather
While climbing out; we noticed that the aircraft was accumulating ice on the windshield wipers and nose. The anti-ice system did not turn on. We were about to manually put the anti-ice system Switch to the ALL position and the system turned on automatically. A minute later we got an EICAS master warning message while in icing conditions. We got a BLD 2 OVERTMP message. We opened the QRH; and followed the procedure in there. We notified ATC that we will level off at FL250 per the QRH. When we turned off bleed 2 and engaged Bleed 1 per the QRH we got a BLD 1 OVER TEMP message while still in the climb. So we went back to the previous configuration of Bleed 2 engaged and bleed 1 closed and the BLEED 2 OVER TEMP message was annunciated yet again. We then got WING ANTI ICE FAIL message. I declared an emergency and asked ATC if at lower altitudes there is no ice. He told us that bellow 16;000 feet we should be clear of ice; so we descended down to 14;000 feet initially and then to 10;000 feet. On the way down we got the message ENGINE-1 ANTI ICE FAIL. Once we got out of the icing we re-engaged the bleeds and the over temp message was gone. We did an ICE-TEST B; and everything worked fine. To note; we did an A-Ice-Test before we left; and we had no abnormalities. We decided to return to the airport of departure. Maintenance is inspecting the aircraft and conducting repairs as needed. To note; the Bleed 2 over-temp occurred while we were in unexpected severe icing. We did not land over weight. Maintenance found a faulty bleed 2 valve.
Passing about 20;000 feet on climbout we experience a BLD 2 overheat. The Captain got into the QRH and ran the checklist and I coordinated for a level off at FL250. After running the QRH we experienced a BLD 1 overheat followed by a wing anti ice fail and an ENG Bleed 1 anti-ice fail. At this point the crew decided to initiate a decent declare an emergency and return due to heavy icing in the area. Crew landed underweight without further incident.
EMB145 flight crew reports anti-ice system failures due to bleed overheat during climb in severe icing. QRH procedures are not successful and the crew elects to descend out of icing conditions and returns to the departure airport.