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.