As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON PREFLIGHT "AUTOFAIL" AND "ALT" LIGHTS WERE FOUND ILLUMINATED ON PRESSURATION PANEL ADDITIONALLY TRIP AIR SWITCH FOUND IN OFF POSITION. VERIFIED "AUTOFAIL" AND "ALT" LIGHTS ON. PERFORMED DCPD BITE TEST. FOUND FAULT "CONTROL LRU FAIL" FAULT CLEARED AND NO HISTORY. OK FOR SERVICE. REF FIM 21 31 00 810 801.