What was found
DISCREPENCY:DURING CLIMBOUT WE EXPERIENCED SMOKE IN THE COCKPIT AND HEARD WHINING SOUND FROM THE AVIONICS BAY, TURNED OFF BLOWER MOTOR AND SMOKE AND WHINING SOUND CEASED. ATB / INSPECTED AIRCRAFT FOUND CAUSE OF SMOKE IN COCKPIT DUE TO BLOWER FAN, NO OTHER DEFECT NOTED AT THIS TIMESEE ITEM 3 FOR BLOWER FAN DISCREPANCY OK FOR SERVICE. / BLOWER FAN INOP / PLACED ON MEL 21-26-01A CONTROL # 1169121 DUE 4-4-2021 WITH MCC. - LP1269513 - REF MDDR 1169121 CORRECTIVE ACTION: REMOVED AND REPLACED BLOWER FAN, OPS CHECK GOOD NO FAULTS AT THIS TIME REF AMM 21-26-51-400-001-A & AMM 21-26-00-710-001-A. THIS CLEARS MEL, PLACARDS REMOVED .