As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI FWD CABIN TEMP EICAS PLUS FWD CABIN INOP LIGHT ,A/C RETURNED TO GATE AND MAINTENANCE GROUNDED A/C.DEFERRED SYSTEM FOR DEPARTURE IAW MEL ABX-21-61-1-2 TROUBLE SHOT AT NEXT BASE AND REMOVED AND REPLACED FWD CABIN TRIM AIR MODULATING VALVE IAW B AMM21-61-07,AND REMOVED AND REPLACED TEMP CONTROL PANEL IAW B AMM 21-51-13 THIS CLEARES DMI 48261