As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU OVERSPEED LT AND AUTO SHUTDOWN ON TAXI IN. GROUNDED - YES. PERFORMED APU BITE TEST FOUND FAULT APU OVERSPEED MSG 49-31014. APU REMAINS ON MEL 49-1B. PERFORMED FIM 49-30 TASK 802. PER FIM TASK, REMOVED AND REPLACED THE FUEL CONTROL UNIT REF AMM 49-31-11. PERFORMED APU OPS TEST, REF AMM 49-11-00-710-801. OPS CHECK GOOD. APU FAULT HISTORY DID NOT SHOW MSG 49-31014 ON LAST APU CYCLE. THIS CLEARS MEL 49-1B.