What was found
SJU-POS - DURING WET T/O, THE RT ENG PRODUCED 80 PERCENT TQ AND THE T/O WAS ABORTED. WHEN ENG WAS RAN DRY, IT PRODUCED CHARTED TQ AND THE CAWI SYSTEM WAS DEFERRED. ON THE ENSUING DRY TAKEOFF, THE RT ENG PRODUCED 74 PERCENT TQ AND T/O WAS ABORTED. MX ADJUSTED SCREW 'X', PERFORMED ENG GROUND RUNS, RUNS WERE SATISFACTORY, AND A/C WAS RETURNED TO SERVICE. IN FLT FROM SJU TO POS, DURING CLIMB, THE RT ENG TQ DROPPED TO 98 PERCENT AND STARTED BY-PASSING. THE A/C RETURNED TO SJU AND MX ADJUSTED SCREW 'X', PERFORMED ENG GROUND RUNS, RUNS WERE SATISFACTORY. A FCF WAS FLOWN BUT WAS UNSATISFACTORY. MX DRAINED THE WATER/METHANOL, SERVICED THE SYSTEM WITH A NEW WATER/METHANOL MIXTURE, AND PERFORMED AN OP CHECK