Narrative:

The flight was the last leg of a 3-DAY pairing to ZZZ1. The first officer was the PF and the captain was the pm. During the takeoff roll after 100 KTS; the master caution illuminated. The takeoff was continued and it was noted that the cowl anti-ice valve was illuminated. During this time both pilots noticed an acrid burning smell. I donned my oxygen mask at that time as a precautionary measure. ATC switched us to departure and we continued the climb out. During the climb out; the smell went away and I also switched off the #2 engine anti-ice switch. I got out the QRH and we attempted to extinguish the cowl anti-ice light by reducing thrust on the #2 engine. The light would not extinguish. Checking the circuit breakers I saw the cowl engine #2 circuit breaker was popped. At this point we broke out on top of the WX. In an attempt to extinguish the light I reset the circuit breaker and then turned on the #2 engine anti-ice switch. The smell returned immediately with a trace of smoke. It was equivalent to a match being struck. We both donned our oxygen masks at this time and I turned the switch off and the smell immediately stopped. At this time we also noticed that the engine #2's wing control circuit breaker in the anti-ice section was popped. No further attempts were made to reset the system and the smell/smoke was gone. The smell was contained to the top console and the flight attendants reported no abnormal odors in the cabin. We believed the problem was in the anti-ice switch. I started looking for a divert airport that did not have icing conditions. I checked nearby airports and they all had icing conditions. I contacted dispatch through ACARS and told them I might need to make a VMC descent and they said the clearing line was at ZZZ2; wherever that is; and said ZZZ1 had scattered clouds and should pose no problem getting in. Since there was no trace of smoke or odors; the decision was made to go to ZZZ1 where it was VMC. During the flight to ZZZ1 I continually checked the WX at possible divert fields and they all had icing conditions. I wrote up the malfunction in the logbook and told maintenance at ZZZ1 about the smoke.

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Original NASA ASRS Text

Title: A B737 #2 ENGINE COWL AND ANTI-ICE WING CONTROL CIRCUIT BREAKERS POPPED AFTER TAKEOFF IN ICING CONDITIONS. A BRIEF ELECTRICAL SMELL WITH SMOKE WAS PRESENT.

Narrative: THE FLT WAS THE LAST LEG OF A 3-DAY PAIRING TO ZZZ1. THE FO WAS THE PF AND THE CAPT WAS THE PM. DURING THE TKOF ROLL AFTER 100 KTS; THE MASTER CAUTION ILLUMINATED. THE TKOF WAS CONTINUED AND IT WAS NOTED THAT THE COWL ANTI-ICE VALVE WAS ILLUMINATED. DURING THIS TIME BOTH PLTS NOTICED AN ACRID BURNING SMELL. I DONNED MY OXYGEN MASK AT THAT TIME AS A PRECAUTIONARY MEASURE. ATC SWITCHED US TO DEP AND WE CONTINUED THE CLBOUT. DURING THE CLBOUT; THE SMELL WENT AWAY AND I ALSO SWITCHED OFF THE #2 ENG ANTI-ICE SWITCH. I GOT OUT THE QRH AND WE ATTEMPTED TO EXTINGUISH THE COWL ANTI-ICE LIGHT BY REDUCING THRUST ON THE #2 ENG. THE LIGHT WOULD NOT EXTINGUISH. CHKING THE CIRCUIT BREAKERS I SAW THE COWL ENG #2 CIRCUIT BREAKER WAS POPPED. AT THIS POINT WE BROKE OUT ON TOP OF THE WX. IN AN ATTEMPT TO EXTINGUISH THE LIGHT I RESET THE CIRCUIT BREAKER AND THEN TURNED ON THE #2 ENG ANTI-ICE SWITCH. THE SMELL RETURNED IMMEDIATELY WITH A TRACE OF SMOKE. IT WAS EQUIVALENT TO A MATCH BEING STRUCK. WE BOTH DONNED OUR OXYGEN MASKS AT THIS TIME AND I TURNED THE SWITCH OFF AND THE SMELL IMMEDIATELY STOPPED. AT THIS TIME WE ALSO NOTICED THAT THE ENG #2'S WING CTL CIRCUIT BREAKER IN THE ANTI-ICE SECTION WAS POPPED. NO FURTHER ATTEMPTS WERE MADE TO RESET THE SYS AND THE SMELL/SMOKE WAS GONE. THE SMELL WAS CONTAINED TO THE TOP CONSOLE AND THE FLT ATTENDANTS RPTED NO ABNORMAL ODORS IN THE CABIN. WE BELIEVED THE PROB WAS IN THE ANTI-ICE SWITCH. I STARTED LOOKING FOR A DIVERT ARPT THAT DID NOT HAVE ICING CONDITIONS. I CHKED NEARBY ARPTS AND THEY ALL HAD ICING CONDITIONS. I CONTACTED DISPATCH THROUGH ACARS AND TOLD THEM I MIGHT NEED TO MAKE A VMC DSCNT AND THEY SAID THE CLRING LINE WAS AT ZZZ2; WHEREVER THAT IS; AND SAID ZZZ1 HAD SCATTERED CLOUDS AND SHOULD POSE NO PROB GETTING IN. SINCE THERE WAS NO TRACE OF SMOKE OR ODORS; THE DECISION WAS MADE TO GO TO ZZZ1 WHERE IT WAS VMC. DURING THE FLT TO ZZZ1 I CONTINUALLY CHKED THE WX AT POSSIBLE DIVERT FIELDS AND THEY ALL HAD ICING CONDITIONS. I WROTE UP THE MALFUNCTION IN THE LOGBOOK AND TOLD MAINT AT ZZZ1 ABOUT THE SMOKE.

Data retrieved from NASA's ASRS site as of May 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.