As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING POWER ON CHECKLIST EMER LTS DO NOT ILLUMINATE WHILE IN THE ARM POSITION. POWERED UP A/C AND EMER LIGHTS OPS CHECKS GOOD. POWERED UP APU AND CHARGED BATTERIES AS REQUIRED. LIGHTS OPS CHECKS GOOD. WORK DONE IN REF CE680A MM 33-50-00. BATTERIES TOOK EXTRA TIME TO CHARGE.