As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EXCESSIVE N1 VIBRATION ON LT ENG DURING TAKEOFF & CLIMB. N1 STAYED IN AMBER BAND. RAN QRH PROCEDURE & UNABLE TO OBTAIN CLIMB POWER. RETARDED THROTTLE TO OPERATE BELOW AMBER BAND & RETURNED. PERFORMED FAN TRIM BALANCE OF LT ENG IAW AMM 71-00-00-5-3 TEST 7. INSTALLED NOSE CONE FAIRING & ROTOR SPINNER IAW AMM 72-35-01-4-4.