As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER START, UPON RECALL L PACK LIGHT ILLUMINATES. LIGHT EXTINGUISHES W MASTER CAUTION RESET. GROUNDED - YES. PERFORMED BITE TEST OF PACK CONTROLLER PER B737-900 FIM 21-62 TASK 801, FOUND SRADA INLET FAULTED AT PREVIOUS FLIGHT. PERFORMED FIM 21-62 TASK 851 AND TEST GOOD. NO DEFECT NOTED AT THIS TIME.