What was found
HIGH E1 N1 VIB ON TAKEOFF. AFTER THRUST REDUCTION N1 WENT BACK TO WITHIN LIMIT VERIFIED CHIP DETECTOR INSTALLATION IAW GMM 09-10-05. EICS MESSAGE L ENG BB VIBRATION PRESENT. CREW REPORTED N3 ENGINEERING UPDATE: PLEASE ACCOMPLISH BLOCK 3, 7, 8 AND 9 WITHIN REF FIM TASK 71-05 FAULT TREE 808 BLOCK 9. PERFORMED MAGNETIC REF FIM TASK 71-05 FAULT TREE 808 BLOCK 9. PERFORMED MAGNETIC VIBRATION AT LOW IDLE, NO ENGINE SHUTDOWN, ALL OTHER ENGINE FIGURE 108 OF FIM TASK 71-05 FAULT TREE 808, HIGH VIBRATION CHIP DETECTORS INSPECTION REF AMM 79-21-03 AND GMM 09-10-05. CHIP DETECTORS INSPECTION REF AMM 79-21-03 AND GMM 09-10-05. PARAMETERS NORMAL. NO OVERWEIGHT LANDING. INDICATED. INSPECTION IS GOOD. INSPECTION IS GOOD. REF. FIM TASK 71-05 FAULT TREE 808 BLOCK 3, AVM BITE PROCEDURE FIM 77-31-00/101 FIG. 103, AVM SYS TEST AMM TASK 77-31-00-732-007-R00. NO FAULTS FOUND. R & R VIBRATION TRANSMITTER IAW AMM 77-31-01/401 AND FIM TASK C/W BLOCKS 7 AND 8 OF FIM 71-05 FAULT TREE 808. VIBRATION SURVEY ACCOMPLISHED AIRBORNE VIBRATION MONITOR SYSTEM TEST REF 71-05 FAULT TREE 808, STILL REQUIRED MM77-31-00. ACCELEROMETER TEST GOOD. WHEN PERFORMING TEST VIBRATION SURVEY TEST REF MM 71-00-00.