As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
"MAINT" LIGHT ILLUMINATED ON LANDING ROLLOUT. GROUNDED - YES. CHECKED STATUS MESSAGE PAGE & NOTED PACK RAM AIR L. PRESENT LEG FAULTS NOTED MAINT MESSAGE 21-55010. LEFT AIR CONDITIONING PACK EXIT RAM AIR DOOR ACTUATOR HAS A SIGNAL ERROR. C/W B737-9 IFIM INITIAL EVAL AND GROUND TEST PASSED & NO MAINTENANCE MESSAGE ON THE GROUND TEST DISPLAY. REF IFIM TASK 31-65-00-810-835 & 21-51-00-810-803.