As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WITH APU RUNNING PLACED BLEEDS AND PACKS ON AND FWD CAB ZONE TEMP LIGHT ILLUMINATED. INTERMITTENTLY, MASTER CAUTION EXTINGUISHED LIGHTS. ZONE TEMP ILLUMINATES ON RECALL. GROUNDED - YES. REPLACED P5-10 PANEL REF AMM 21-51-65 OP CHECK NORMAL. FWD CABIN ZONE TEMP LIGHT NO LONGER ILLUMINATES ON RECALL.