What was found
ENGINE NR 1 IS BURNING NEARLY 200 POUNDS PER HOUR MORE THAN ENGINE 2. PREVIOUS CREW ON INBOUND FLIGHT REPORTED 1,200 - 1,500 LBS OVER BURN ON LANDING, NR 1 ENG BURNED 900 LBS MORE FUEL THAN NR 2 ENGINE. OVERBURN BY 800 LBS TOTAL FUEL BALANCE ON LANDING WAS WITHIN 100 LBS FROM LT TO RT TANKS. GROUNDED - YES. FUEL USAGE 800-1200 LBS OVER FORECAST, NO UNUSUAL WINDS OR WEATHER, NO IMBALANCE DURING FLIGHT, NR 1 ENG FF 2.2 & NR 2 ENG FF 2.0. IMBALANCE IN FUEL FLOW CORRELATED WITH OVERBURN, NR 1 ENG EGT 40 LESS THAN NR 2 AT ALL PHASES OF FLT. ALL OTHER INDS NORMAL. LANDING FUEL 5.5 LBS FORECAST 6.3 LBS. FUEL USED PAGE SHOWS NR 1 11.60 & #2 10.73. C/W ENG NR 1 EEC BITE & SELF TEST & CDS BITE TEST, NO FAULTS. C/W CONTINUITY CHECK OF WIRING BETWEEN FF XMTR & EEC NO FAULTS FOUND. IAW FIM 23-07 TASK 802. R & R NR 1 ENGINE FUEL FLOW TRANSMITTER IAW AMM 73-31-01 OPS & LEAK CK GOOD. NO FAULTS PRESENT ON ENGINE RUN - EEC BITE CK (TEST 13) ETOPS GROUND VERIFICATION SUCCESSFUL.