What was found
RETURN TO IAH FOR VERY HIGH AND AUDIBLE ENGINE VIBRATION IND WAS AS AT TOP OF SCALE MAXED OUT AFTER VISITING WITH THE PILOTS, THE VIBRATION INDICATIONS WERE COMING FROM THE RT ENG ONLY. RESONANCE SOUNDS WERE DISTINCTLY COMING FROM THE RIGHT SIDE. NO VIBRATIONS FELT IN FLT CONTROLS OR AIRFRAME. THE RESONANCE & THE VIBE INDICATIONS SUBSIDED & WENT AWAY AS THE POWER LEVERS PULLED BACK & RETURNED WHEN THE POWER LEVERS WERE ADVANCED A ND THEY WERE CLIMBING. WORK CARD 7221-01347-001.ON-WING- FAN BLADE ULTRASONIC INSPECTION AND BROACHED DISK LUBRICATION AD 2018-09-51 COMPLETED ON NR 2 ENGINE WITH A POWER RUN VIBRATION SURVEY TEST 7 COMPLETED IAW AMM 71-00-00-700-814-F00. TEST PASSED, NO ABNORMAL VIBRATIONS NOTED