As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
JUST PRIOR TO PUSHBACK EMER LIGHTS AT LEFT O/W EXIT AND AFT LEFT DOOR ILLUMINATED WITH SWITCH IN ARM POSITION. FOUND C/B LEFT AFT CHG POPPED. FOUND POWER SUPPLY M01673 AT FAULT. REMOVED AND REPLACED POWER SUPPLY M01673. OPS CK GOOD. REF WDM 33-51-11. (8722042) AIRCRAFT WAS GROUNDED