As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(SUPPORT TASK) EMERGENCY LIGHTS ASSOCIATED WITH POWER SUPPLY M28 16 INOP. TRANSCRIBED FROM HAECO GSO NR 9282944. REMOVED AND REPLACED BATTERY PACK M2816 AND PERFORMED OPERATIONA L TEST, OPERATIONAL TEST GOOD IAW B737 AMM 35-51-00. REF HAECO GSO MECH V934695 INSP QC467