As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING DEICE, APU FLAMED OUT. OVERSPEED LIGHT ILLUMINATED STEADY. DID NOT ATTEMPT RE-START. ACFT GROUNDED. APU INTERAGATION SHOWS MAINTENANCE MESSAGE 49-31014. ACCOMPLISHED FIM TASK 49-30, TASK 802 PERFORMED OPERATIONAL TEST OF APU IAW AMM TASK 49-11-00-710-801. OPS CHECKED NORMAL. REINTERAGATED APU ON NEW FAULTS NOTED.