As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: CLIMBING THROUGH 22,000 FEET WITH ENGINE ANTI ICE ON, NUMBER 1 ENGINE LOST THRUST AND EXHIBITED EXCESSIVE VIBRATION. REDUCED THRUST BUT COULD NOT ACHIEVE MORE THAN 40% WITHOUT VIBRATION SO SHUT ENGINE DOWN. EMERGENCY WAS DECLARED AND AIRCRAFT WAS NOT OVERWEIGHT FOR LANDING. REMOVED AND REPLACED LEFT ENGINE PER JOBCARD 08L40072003.