Step 22
Remove the following 6 screws:
One 3 mm Phillips on the right side of the fan.
One 6 mm Phillips on the left side of the fan.
Four 9 mm Phillips securing the heat sink to the lower case.
Step 23
Hold the heat sink with one hand and the fan with your other hand, and lift the heat sink and fan assembly out of the computer. The fan is attached to the heat sink only with a strip of black felt tape, so be sure to remove both parts as a unit
Step 24
Disconnect the three antenna cables from the Airport card, and the black inverter cable from the logic board.