As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
OVERHEAT CIRCUIT L1 LEFT ENGINE OVERHEAT DETECTION CIRCUIT 1 FAILURE. STATUS MSG-2610131 ACTIVE ER HARD. HISTORY ON THIS ITEM SINCE 2010APR. PLS REVIEW PARTS REPLACED AND HISTORY. ACCOMPLISHED FIM 26-11 TASK 808. USING MEAGOHMMETER FOUND RESISTANCE VALUE LESS THAN MINIMIM SHOWN IN FIM (0 MEGOHMS). FOR LWR AFT FIRE DETECTOR M26005, NEED 566-0133 NIS AT LAX. CONFIRMED LOOP M26005 IS OUT OF TOLERANCE PER FIM. REPLACED LOOP M26005 AND PERFORMED TEST. NO MESSAGE IS PRESENT.