As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT PACK LIGHT ILLUMINATED FL 260 IN CLIMB RAN QRH AND PACK LIGHT CLEARED 1 MINUTE LATER LIGHT RE-ILLUMINATED RAN QRH SHUT OFF PACK CLOSED ISOLATION VALVE. GROUNDED - YES. PERFORMED BITE CHECK OF LEFT AND RIGHT PACK TEMP CONTROLLER PER FIM 21-53-00 NO CURRENT FAULTS NO PREVIOUS LEG FAULTS. PERFORMED VERIFY NO FAULTS NOTED.