Remove the following 10 screws securing the lower case to the Air: Six 2.8 mm Phillips screws. Two 3.8 mm Phillips screws. Two 5.4 mm Phillips screws. /Guide/Installing-MacBook-Air-Models-A1237-and-A1304-AirPort-Bluetooth-Board/849/all#s4617 Slightly lift the lower case near the vents and push it toward the rear of the computer to free the mounting tabs. /Guide/Installing-MacBook-Air-Models-A1237-and-A1304-AirPort-Bluetooth-Board/849/all#s4618 Slightly lift the lower case near the vents and push it toward the rear of the computer to free the mounting tabs. /Guide/Installing-MacBook-Air-Models-A1237-and-A1304-AirPort-Bluetooth-Board/849/all#s4618 Disconnect the battery connector by pulling it straight out of its socket. /Guide/Installing-MacBook-Air-Models-A1237-and-A1304-AirPort-Bluetooth-Board/849/all#s4619 Remove the following nine screws securing the battery to the Air: Four 2.9 mm Phillips. Four 3.8 mm Phillips. One 7.2 mm Phillips. /Guide/Installing-MacBook-Air-Models-A1237-and-A1304-AirPort-Bluetooth-Board/849/all#s4621 Lift the battery out of the Air. /Guide/Installing-MacBook-Air-Models-A1237-and-A1304-AirPort-Bluetooth-Board/849/all#s4622 Remove the two following screws securing the AirPort/Bluetooth board bracket to the upper case: One 4.7 mm Phillips. One 3.9 mm Phillips. Lift the AirPort/Bluetooth bracket out of the upper case. /Guide/Installing-MacBook-Air-Models-A1237-and-A1304-AirPort-Bluetooth-Board/849/all#s4623 Remove the two following screws securing the AirPort/Bluetooth board bracket to the upper case: One 4.7 mm Phillips. One 3.9 mm Phillips. Lift the AirPort/Bluetooth bracket out of the upper case. /Guide/Installing-MacBook-Air-Models-A1237-and-A1304-AirPort-Bluetooth-Board/849/all#s4623 Using a spudger, pry the AirPort/Bluetooth ribbon cable connector straight up off the AirPort/Bluetooth board. /Guide/Installing-MacBook-Air-Models-A1237-and-A1304-AirPort-Bluetooth-Board/849/all#s4624 Use a spudger to pry the three antenna cables up off the AirPort/Bluetooth board. /Guide/Installing-MacBook-Air-Models-A1237-and-A1304-AirPort-Bluetooth-Board/849/all#s4625 Remove the single 3.2 mm Phillips screw from the upper right corner of the AirPort/Bluetooth board. Lift the AirPort/Bluetooth board out of the upper case. /Guide/Installing-MacBook-Air-Models-A1237-and-A1304-AirPort-Bluetooth-Board/849/all#s4626 Remove the single 3.2 mm Phillips screw from the upper right corner of the AirPort/Bluetooth board. Lift the AirPort/Bluetooth board out of the upper case. /Guide/Installing-MacBook-Air-Models-A1237-and-A1304-AirPort-Bluetooth-Board/849/all#s4626