What was found
AVIONICS COMPARTMENT BATTERY RACK CENTER HAT CHANNEL IS CRACKED AT FRAME 15C. REMOVED AND REINSTALLED BATTERIES IAW A300-600 AMM 24-31-11-4. ACFT BATTERIES OPS CHECKED GOOD IAW AMM 24-31-00-5. SET A/C CLOCKS IAW AMM 31-21-00. REMOVED AND REINSTALLED BATTERY RACK COVER SUPPORT IAW SRM 51-40-21, PARA 7, PG 5. REMOVED BATTERY RACK HAT CHANNEL IAW SRM 51-72-10, PARA 5. LOCATED AND DRILLED HAT CHANNEL P/N A9242053522200 IAW SRM 51-72-10, PARA 6-A. INSTALLED BATTERY RACK HAT CHANNEL IAW SRM 51-72-10, PARA 6.