Narrative:

Upon descent into the harrisburg, PA, area, we encountered icing conditions. Selected engine cowl anti-ice on, and standby wing anti-ice on (the normal wing anti-ice system was deferred by maintenance). A 'left wing anti-ice' caution message illuminated, so we followed the QRH procedure and opened the 14TH stage isolation valve, and the caution message extinguished, and we landed without incident. After landing, I called our company maintenance department, and told them that the standby wing anti-ice was now malfunctioning, in addition to the normal wing anti-ice system. Maintenance told me to do a ground operations check of the system, and call them back. I performed the operations check. The standby wing anti-ice worked correctly, so I shut down the aircraft again and called maintenance. I told them the operations check was good, the standby anti-ice system was working normally. I told them that I had not yet written a maintenance write-up, and asked them if they wanted me to write it up. They said if there is no write-up, and the aircraft operations checked good, that I could continue flying the aircraft. I returned to the airplane, and we flew to cincinnati. Upon climb out of harrisburg, we encountered icing conditions, and I turned on the engine cowl anti-ice and the standby wing anti-ice. Once again we got a 'left wing anti-ice' caution message, and I pulled out the QRH and selected 14TH stage isolation valve open, and the message cleared. I informed maintenance via radio that we would arrive in cincinnati with a standby wing anti-ice problem, and the flight continued without incident. Upon landing, I wrote up that malfunction, called maintenance, and gave a thorough briefing to the oncoming captain who was to take over the aircraft from me. The next day I learned that maintenance had reported to the FAA that I had flown an aircraft with a known malfunction, and had not written it up, and had handed the aircraft over to the next crew without informing them of the problem.

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Original NASA ASRS Text

Title: A CANADAIR CL65 WAS DISPATCHED INTO ICING CONDITIONS IN NON COMPLIANCE WITH 2 KNOWN L WING ANTI-ICE VALVE FAILURES.

Narrative: UPON DSCNT INTO THE HARRISBURG, PA, AREA, WE ENCOUNTERED ICING CONDITIONS. SELECTED ENG COWL ANTI-ICE ON, AND STANDBY WING ANTI-ICE ON (THE NORMAL WING ANTI-ICE SYS WAS DEFERRED BY MAINT). A 'L WING ANTI-ICE' CAUTION MESSAGE ILLUMINATED, SO WE FOLLOWED THE QRH PROC AND OPENED THE 14TH STAGE ISOLATION VALVE, AND THE CAUTION MESSAGE EXTINGUISHED, AND WE LANDED WITHOUT INCIDENT. AFTER LNDG, I CALLED OUR COMPANY MAINT DEPT, AND TOLD THEM THAT THE STANDBY WING ANTI-ICE WAS NOW MALFUNCTIONING, IN ADDITION TO THE NORMAL WING ANTI-ICE SYS. MAINT TOLD ME TO DO A GND OPS CHK OF THE SYS, AND CALL THEM BACK. I PERFORMED THE OPS CHK. THE STANDBY WING ANTI-ICE WORKED CORRECTLY, SO I SHUT DOWN THE ACFT AGAIN AND CALLED MAINT. I TOLD THEM THE OPS CHK WAS GOOD, THE STANDBY ANTI-ICE SYS WAS WORKING NORMALLY. I TOLD THEM THAT I HAD NOT YET WRITTEN A MAINT WRITE-UP, AND ASKED THEM IF THEY WANTED ME TO WRITE IT UP. THEY SAID IF THERE IS NO WRITE-UP, AND THE ACFT OPS CHKED GOOD, THAT I COULD CONTINUE FLYING THE ACFT. I RETURNED TO THE AIRPLANE, AND WE FLEW TO CINCINNATI. UPON CLBOUT OF HARRISBURG, WE ENCOUNTERED ICING CONDITIONS, AND I TURNED ON THE ENG COWL ANTI-ICE AND THE STANDBY WING ANTI-ICE. ONCE AGAIN WE GOT A 'L WING ANTI-ICE' CAUTION MESSAGE, AND I PULLED OUT THE QRH AND SELECTED 14TH STAGE ISOLATION VALVE OPEN, AND THE MESSAGE CLRED. I INFORMED MAINT VIA RADIO THAT WE WOULD ARRIVE IN CINCINNATI WITH A STANDBY WING ANTI-ICE PROB, AND THE FLT CONTINUED WITHOUT INCIDENT. UPON LNDG, I WROTE UP THAT MALFUNCTION, CALLED MAINT, AND GAVE A THOROUGH BRIEFING TO THE ONCOMING CAPT WHO WAS TO TAKE OVER THE ACFT FROM ME. THE NEXT DAY I LEARNED THAT MAINT HAD RPTED TO THE FAA THAT I HAD FLOWN AN ACFT WITH A KNOWN MALFUNCTION, AND HAD NOT WRITTEN IT UP, AND HAD HANDED THE ACFT OVER TO THE NEXT CREW WITHOUT INFORMING THEM OF THE PROB.

Data retrieved from NASA's ASRS site as of July 2007 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.