As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING MPD - SEG 6 CK (WO# 16337064), FOUND SPARE BATTERY M735 FOR EMERGENCY LIGHTS INOP. REMOVED AND REPLACED EMERGENCY LIGHT POWER SUPPLY BATTERY M735 IAW B767 AMM 33-51-07 OPS CHECK GOOD. AIRCRAFT RETURNED TO SERVICE AFTER SEG 6 CK WAS C/W.