As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ETOPS SIGNIFICANT SYSTEM, AFT COMPT TEMP STUCK AT 99 DEG F (ECS PG SHOWS "BLANK" AFT DUCT TEMP). AFT COMP TEMP SELECTOR CYCLED FULL COLD THEN FULL HOT. INDICATION ALL NORMAL THROUGHOUT RANGE. OK FOR FURTHER SERVICE. BOTH LEFT AND RIGHT EICAS COMPUTERS BITE CHECK CARRIED OUT. NO FAULTS FOUND. ECS PAGE IND NORMAL.