As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT PACK LIGHT ILLUMINATED WITH MASTER CAUSTION TEST AND RESETS WITH MASTER CAUTION RESET. ACFT GROUNDED. ACCOMPLISHED CTC BITE, SHOWED ONE FAULT, CLEARED FAULT AND RE-RAN CTC BITE TEST AGAIN WITH NO DISCREPANCIES NOTED. PACK LIGHT DOES NOT ILLUMINATE WITH RECALL. RAN PACK WITH NO DEFECTS NOTED. TESTED RECALL AGAIN, LIGHT REMAINS OUT. NO PRIOR HISTORY 90 DAYS. REF B737-900 AMM 21-61-00. GROUND VERIFICATION SATISFACTORY.