What was found
#1 ENGINE TREND DATA SHOWS INDICATION ERRORS HAVE BEEN RESOLVED. LOW PRESSURE ROTOR VIBRATION LEVELS CONTINUE TO BE HIGHER THAN DESIRED. GROUNDED - YES. ACCOMPLISHED B737-900 AMM TASK 71-00-00-750-808-F00 TEST 14B- FAN TRIM BALANCE. ACCOMPLISHED ENG #1 BALANCE SOLUTION, BEFORE SOLUTION ENG WEIGHT CONFIG. POS12= P11, POS13=P13, POS14=P13, POS15=P13, POS16=P11. AFTER SOLUTION POS15=P13, POS16=P13, POS17=P13, POS18=P13. ALL ELSE NOMINAL. VERIFIED ACTUAL CONFIG & AVM WEIGHTS MATCHED BEFORE & AFTER SOLUTION. PER TECH SERVICES GE TREND DATA SHOWS VIBRATION LEVELS HAVE RETURNED TO NORMAL.