As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: WHILE REPLACING ESCAPE SLIDE 833LH FORWARD, AFTER INSTALLATION PER JOB CARD 26L0002512. EMERGENCY POWER SUPPLY UNIT TEST FAILED. TROUBLE SHOT TO FAULTY R1 DOOR ESCAPE SLIDE/RAFT. REMOVED AND REPLACED R1 SLIDE/RAFT PER JOB 26L00025011.