What was found
ORD - FLT 4140 - MAIN BRAKES FAILED. REPLACED ALL FOUR BRAKES P/N 21624, SERIAL 19362, NR 2 P/N 24707 SERIAL 0416, NR 3 P/N 21624 S/N 2951, NR 4 P/N 21707 S/N 3025. ALL FOUR MAIN TIRES POPPED, ALL FOUR PART NUMBERS 31641. REPLACED CONTROL UNIT P/N 42-951-5 S/N 789. REPLACED TRANSDUCERS P/N 0132AFU2. REPLACED ELECTRICAL HARNESS P/N 20017560. REPLACED BRAKE PEDAL TRANSDUCER P/N 200117500. ALL OPS CHECK GOOD. AIRCRAFT RETURNED TO SERVICE. (M)