What was found
DURING BLOCK IN AFTER SETTING PARKING BRAKE AND STARTING ENGINE SHUTDOWN, HEARD A GRINDING FAN NOISE WITH AN ACCOMPANING ODOR OF SOMETHING BURNING, MOST LIKELY AN ELECTRICAL FAN. PERFORMED GVI OF FWD AVIONICS BAY ON ACFT ARRIVAL. NO SMOKE NOTED OR SIGNS OF BURNING. ARCING, OR DAMAGE. NO SMOKE NOTED IN COCKPIT AND NO CIRCUIT BREAKERS TRIPPED. PERFORMED AIR SYS TEST IAW AMM 21-08-01. TEST FAULTS AVIONICS RACK FAN 3. R & R THE NR 3 AVIONICS RACK COOLING FAN IAW MM 21-26-02-2-1 , OPS CHECKED GOOD.