As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU INOP - AUTO-SHUTDOWN DURING ENG START. AIRCRAFT BACK TO BLOCK AND GROUNDED BY MAINTENANCE. MAINTENANCE DEFERRED THE APU IAW MEL 49-11-1A. NO MAINTENANCE PROCEDURES APPLY. PLACARDS INSTALLED. MBCB 07/26/2022. AIRCRAFT RETURNED TO SERVICE