As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHORTLY AFTER TAKEOFF, NOTICED ENGINES EXTREMELY OUT OF SYNC. COULD NOT FIX PROBLEM BY CHANGING POWER. RETURNED TO LAND. NR 2 ENGINE WAS AT 98 PERCENT WHILE NR 1 ENGINE WAS AT 100.1 PERCENT. REMOVED AND REPLACED RIGHT PCU IAW MM 61-21-00 AND 61-20-02.