As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
10 MINUTES PRIOR TO PUSH APU MAINT LIGHT ILLUMINATED. ACFT GROUNDED. INTERROGATED CDU FOUND MESSAGE 49-91227 LOW OIL QUANTITY, ACCOMPLISHED SHUTDOWN OF APU & VERIFIED OIL QUANITIY FULL. RESTARTED APU WITH NO LIGHT ILLUMINATION OF MAINTENANCE REF AMM FIM TASK 49-90-804. NO HISTORY, 30 DAYS, OK FOR CONTINUED SERVICE.