Narrative:

During taxi to runway 31 at lga; both engines running on taxiway a; holding short of taxiway V. Taxi checklist was complete. Both engines had been running approximately 5 mins. We had a caution chime message 'EICAS comparator monitor.' at this time; the gauges for #2 engine went blank. The round gauges (N1; N2; itt) were there; but had no numbers on them. 5-10 seconds later; engine indications reappeared. N1 and N2 were reading abnormally and itt was in the red. Captain then shut down #2 engine. We decided to taxi back to the gate for maintenance. As we taxied back; I asked ramp control if they saw anything abnormal with our #2 engine/right side; and they said no. As we were rolling into spot X on blast fence; we smelled a strong burning odor. Captain said to notify the flight attendant we were evacing the aircraft. I called the flight attendant and told her to evacuate/evacuation passenger out the main cabin door as soon as we came to a stop. Captain told me to go assist in getting passenger off the aircraft; to which I did; and 12 passenger were evacuate/evacuationed without injury or incident. Callback conversation with reporter revealed the following information: the reporter stated the tapes were analyzed of the #2 engine performance and it was noted the engine had a number of starting irregularities and coupled with the overtemp event the engine was changed. The evacuate/evacuation on the gate went smoothly and no injuries were incurred.

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Original NASA ASRS Text

Title: A CRJ200 ON TAXI OUT HAD CAUTION CHIME MESSAGE 'EICAS COMPARATOR MONITOR' ENG INDICATORS ON #2 ENG BLANK. INDICATORS RETURNED WITH ITT IN RED 990 DEGS. ENG SHUT DOWN.

Narrative: DURING TAXI TO RWY 31 AT LGA; BOTH ENGS RUNNING ON TXWY A; HOLDING SHORT OF TXWY V. TAXI CHKLIST WAS COMPLETE. BOTH ENGS HAD BEEN RUNNING APPROX 5 MINS. WE HAD A CAUTION CHIME MESSAGE 'EICAS COMPARATOR MONITOR.' AT THIS TIME; THE GAUGES FOR #2 ENG WENT BLANK. THE ROUND GAUGES (N1; N2; ITT) WERE THERE; BUT HAD NO NUMBERS ON THEM. 5-10 SECONDS LATER; ENG INDICATIONS REAPPEARED. N1 AND N2 WERE READING ABNORMALLY AND ITT WAS IN THE RED. CAPT THEN SHUT DOWN #2 ENG. WE DECIDED TO TAXI BACK TO THE GATE FOR MAINT. AS WE TAXIED BACK; I ASKED RAMP CTL IF THEY SAW ANYTHING ABNORMAL WITH OUR #2 ENG/R SIDE; AND THEY SAID NO. AS WE WERE ROLLING INTO SPOT X ON BLAST FENCE; WE SMELLED A STRONG BURNING ODOR. CAPT SAID TO NOTIFY THE FLT ATTENDANT WE WERE EVACING THE ACFT. I CALLED THE FLT ATTENDANT AND TOLD HER TO EVAC PAX OUT THE MAIN CABIN DOOR AS SOON AS WE CAME TO A STOP. CAPT TOLD ME TO GO ASSIST IN GETTING PAX OFF THE ACFT; TO WHICH I DID; AND 12 PAX WERE EVACED WITHOUT INJURY OR INCIDENT. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE TAPES WERE ANALYZED OF THE #2 ENG PERFORMANCE AND IT WAS NOTED THE ENG HAD A NUMBER OF STARTING IRREGULARITIES AND COUPLED WITH THE OVERTEMP EVENT THE ENG WAS CHANGED. THE EVAC ON THE GATE WENT SMOOTHLY AND NO INJURIES WERE INCURRED.

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.