As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
#2 ENG "FAIL" DURING TAXI OUT. GROUNDED - YES. REMOVED AND REPLACED HMU. REMOVED AND REPLACED MAIN OIL/FUEL HEAT EXCHANGER REF. AMM 79-21-02-000-801-F00 AND AMM 79-21-02-400-801-F00. PERFORMED TEST 3A,12 AND 13; NO LEAK NOTED, OPERATIONAL CKS GOOD, NO FAULT ON EEC BITE TEST REF.