As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: WHILE ACCOMPLISHING DOOR 1R EMERGENCY POWER ASSIST SYSTEM RESERVOIR INSPECTION, STEP 8A EMERGENCY POWER ASSIST SYSTEM FUNCTIONAL TEST FAILED. AFTER TROUBLESHOOTING FOUND ON 1R DOOR MODE SELECTOR WAS BAD. REMOVED AND REPLACED MODE SELECTOR SWITCH, TEST GOOD ALL PER B777 52-12-28-000-801.