As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: DOOR EMERGENCY POWER ASSIST SYSTEM SENSORS 1L STATUS MESSAGE. REMOVED AND REPLACED L1 EMERGENCY POWER ASSIST SYSTEM MODULE (AALA202111168005) PER B787-A-52-10-F2-89A-421A-A. REMOVED AND REPLACED 1L DOOR ASSIST EMERGENCY POWER ASSIST SYSTEM BOTTLE PER B787-A-52-11-22-00A-720A-A.