As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING PUSHBACK, FIRE/OVHT SYS EICAS MSG. CREW ACCOMPLISHED QRH 8.35. MSG CLEARED THEN REAPPEARED ON FINAL. MTC SWAPPED LT ENG LP2 FIRE DETECTION CARD (M682) AND R/H ENG LP2 FIRE DETECTION CARD (M684) IAW B767 AMM 26-10-01. OPS CHECK GOOD. A/C REMAINS NO ETOPS. A/C RETURNED TO SERVICE.