AN A319 PILOT REPORTS THE ECAM CRT'S ARE UNREADABLE IN DAYLIGHT CONDITIONS DUE TO THEIR DIMNESS.

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THIS MAKES MULTIPLE TIMES I'VE WRITTEN UP CRT'S THAT ARE UNUSABLE IN DAYLIGHT CONDITIONS BECAUSE THEY ARE SIMPLY TOO DIM AND MAINT MANUAL 'OPS CHKS OK' AFTER I LEAVE THE ACFT. THIS WAS SIGNED OFF WHEN IT WAS DARK OUTSIDE -- NO WAY TO DUPLICATE THE CONDITIONS OF FAILURE. WHAT MAKES IT WORSE IS THAT PLTS HAVE BEEN TOLD 'IT'S A BUS THING' AND THEY BELIEVE IT. I DO NOT WANT TO BE THE GUY WHO HAS AN ECAM HE CAN'T READ WITHOUT HOLDING UP A CHKLIST TO SEE WHICH ENG IS ON FIRE AND WHAT THE IMMEDIATE PROCS ARE. I HAVE BROUGHT THIS TO YOUR ATTN SEVERAL TIMES BEFORE. AS I HAVE TIME; I WILL CONTACT OUR FLEET; FAA FOLKS IN THE BUILDING; AND FAA FOLKS NOT CONNECTED TO ACR X IF THAT IS WHAT IT TAKES. NOBODY IS PICKING UP THIS BALL SEEMINGLY BECAUSE IT IS A VERY EXPENSIVE ONE AND THE CRT'S HAVE NOT YET BEEN THE CAUSE OF AN ACCIDENT. ONCE AGAIN -- MAINT MANUAL HAS NO WAY OF MEASURING THE CANDLE PWR OF A SCREEN; SO THE FIX IS: 1) 'LOOKS GOOD TO ME;' 2) 'WE DON'T HAVE ANY IN STOCK SO IT MUST BE OK;' 3) 'LOOKS AS GOOD AS THE ONE NEXT TO IT;' 4) 'LOOKS AS GOOD AS THIS BAD ONE FROM SUPPLY;' 5) 'CAPT -- WHY WON'T YOU TAKE THIS? I CAN SEE IT FINE UNDER THE CLOUDS HERE AT THE GATE WHEN THE SUN IS NO FACTOR AND I'M WEARING A DARK BLUE COAT!' IT TAKES A MECH WHO UNDERSTANDS THE DIFFERENCE BTWN NIGHT AND DAY; BRIGHT SUNSHINE AND SIMPLE DAYLIGHT; AND THE FACT THAT THE ACFT FACES MANY DIFFERENT DIRECTIONS THAN THE STATIC LOOK AT THE GATE.