What was found
BKUP BATT OFF BUS NEVER CLEARED IN FLIGHT, (CREW) RAN QRH, MSG NEVER CLEARED. R&R BACKUP BATTERY IRT AMM 24-35-01. NO FIX. R&R RELAYS K0456,K0457 IRT AMM 20-13-02. NO FIX. R&R ELEC CONTROL PANEL IRT AMM 24-00-01. NO FIX. DISCONNECT ELECTRICAL CONNECTOR TO B/U BATT. DFRL 20APR26 00:02 CLT CONTACTOR LOOSE. RE-SEATED CONNECTOR. PEFORMED APU GENERATION OPS CK IRT 24-34-00. OPS CK OK. C/W AVIONICS OPS CK, OPS CK IRT 24-62-00. CHECK GOOD. C/W AC GENERATION OPS CK AMM 24-20-00. OPS CK OK. FACT 20APR26 00:03 CLT C/W DC DISTRIBUTION OPS CK AMM 24-60-00. OPS CK OK. C/W GENERATOR OPS CK AMM 24-31-00. OPS CK OK. A/C OK FOR SVC.