As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ETOPS SIGNIFICANT SYS -TOP OF CLIMB LT EGT INDICATOR SKEWED LOW 470-540 DEG C, WHEN NORMAL 724 DEG C. FOUND 2 EGT PROBE AT TOP OF ENG LOOSE TERMINAL NUTS. RETORQUED NUTS IAW AMM 77-21-01. RAN-UP BOTH ENGINES. EGT IND SYS OPS CHECK OK IAW AMM 77-21-00.