As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOLLOW-UP TO RECENT REPORTS OF BOTH SPAR VALVES CLOSED LIGHTS ON BRIGHT WITH VALVES CLOSED. ACFT GROUNDED. INSPECTED C1472, C359, AND C360. FOUND LOOSE TERMINAL AT C360. TIGHTENED 1 TURN ON LOAD SIDE. THE REST OF THE TERMINALS OK. DIODE R669 LOOKS OK, NO DEFECTS. REMOVED AND INSTALLED NEW M1957 BATTERY PACK REF 28-22-14. ACCOMPLISHED FUEL SHUTOFF VALVE BATTERY TEST REF AMM 28-22-00-720-801. VALVE LIGHTS GO BRIGHT TO DIM. SYS CHECKS NORMAL.