What was found
DURING TAXI CREW REPORTED AFTER STARTING L&R ENG. EEC MODE AND PROBE HEAT EICAS MESSAGE DISPLAYED , A/C RETERNED TO THE GATE (BTB) AND MTX GROUNDED A/C , FOUND RELAY K528 AND RELAY SOCKET MELTED, REPLACED K528 RELAY SOCKET AND RETERMINATED ASSOCIATED WIRING IAW B767 WDM 30-31-21C AND SWPM 20-81-12, ALSO REMOVED AND REPLACED K528 RELAY, OPS AND CONTINUITY CHECK GOOD, .OPS AND CONTINUITY CHECKS GOOD IAW AMM 30-31-00.AIRCRAFT REMAINS NO ETOPS. A/C RETURNED TO SERVICE.