What was found
NR 2 ENGINE HAS HISTORY OF FUEL LEAKS ON THE GROUND AT ENGINE START ON FIRST FLIGHT OF THE DAY. ACFT GROUNDED. REPLACED NR 2 ENG TBV IAW AMM 75-23-01. FOUND LEAK COMING FROM FUEL PUMP PAD DRAIN. ACCOMPLISHED FUEL PACKAGE REMOVAL IAW AMM 73-11-01-000-801-F00, STEP 2A-H14. FINISHED FUEL PACKAGE REMOVAL IAW MM73-11-01-000-801-F00 STEP 2(H) 15-17. INSTALLED HMU TO FUEL PUMP IAW AMM 73-21-10-400-801-F00 THRU STEP H1. INSTALLED MAIN OIL/ FUEL HEAT EXCHANGER IAW AMM 79-21-02-400-801-F00, STEP 3(G)(1). COMPLETED INSTALL OF HMU, MAIN/ OIL FUEL HT EXCHANGER & FUEL PUMP PACKAGE REF AMM'S 73-11-01-400-801-F00, 73-21-10-400-801-F00 & 79-21-02-400-801-F00. LEAK CHECK AND ALL ASSOCIATED TESTS PASSED.