As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REPEAT GRIPE BODY DUCT OVERHEAT LIGHT ON MOMENTARILY AFTER SECOND ENG START. RAN ENGINES 1 AND 2 GOT DUCT OVERHEAT GOT LIGHT AGAIN. REPLACED CARD M691, NO HELP. RE-INSTALLED ORIGINAL CARD. FOUND DETECTION LOOP TS226 LAYING ON APU BLEED DUCT JUST FWD OF APU BLEED VALVE. REPOSITIONED LOOP. RAN ENGS, DUCT LEAK LIGHT REMAINS EXTINGUISHED.