What was found
#1 ENGINE TREND DATA SHOWS LOW PRESSURE ROTOR VIBRATION LEVELS RISING AFTER LAST FAN LUBE. CNR 20220622052. GROUNDED - YES. ACCOMPLISHED ON BOARD FANTRIM BALANCE PROCEDURE REF B737-800 AMM 71-00-00 TEST14B. NEED TO ACCOMPLISH VIBRATION SURVEY REF AMM 71-00-00 TEST 7 TO VERIFY VIBRATION LEVELS HAVE RETURNED TO NORMAL. ACCOMPLISHED TEST 7 -VIBRATION SURVEY PER TASK 71-00-00-700-814-F00. A/C GOOD FOR SERVICE. CLEARED TSR712581.