What was found
FLT#21, BOS-PBI. (AIRCRAFT PERFORMED AN AIR TURN BACK TO BOS). '" R BLEED OVHT" CAUTION MESSAGE O N CLIMBOUT. SEVERAL MINUTES AFTER TAKE OFF. SYNOPTIC PAGE SHOWS YELLOW BLEED DUCTS ON THE FLIGHT SIDE FROM X BLEED VALVE TO PACK VALVE. RAN ECL MESSAGE STAYED ON . NO ICING CONDITIONS MESSAGE CLEARED DURING IDLE DESCENT LATER IN LIGHT; PLEASE REF ITEM 2 BELOW FOR EXISTING MEL RECLASSIFYING CAUTION ( MDDR 585205 ((RESOLVED ON W/O: 1417749 TASKCARD: NR-00005 ) ITEM CLEARED BY REMOVED AND REPLACED OF FAN AIR VALVE & PRECOOLER SEE DEFECT 4202632-1 & 2, 420239-2 FOR OPS & R&R INFO THIS CLEARS MDDR A/C OK FOR SERVICE)) WHICH ADDRESSED THIS WRITE UP.'