As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ON LANDING THE PIC COULD NOT ACTIVATE THE NORMAL BRAKES AND THE NOSE WHEEL STEERING. PIC USED NR 2 BRAKE SYSTEM AND DIFFERENTIAL POWER TO CONTROL THE AC. SQUAT SWITCH WAS REMOVED, CLEANED AND RE-INSTALLED. NORMAL BRAKES AND NOSE WHEEL STEERING FUNCTION TESTED SERVICEABLE. AC RETURNED TO SERVICE. OPERATOR PLANS TO IMPLEMENT MONTHLY INSPECTION AND CLEANING OF ALL LANDING GEAR SWITCHES OF MOISTURE.