As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMB OUT AT APPROX 4000 R ENG STARTED A SLOW ROLLED BACK. 2000 POUND FF LESS THAN L ENG WITH CORRESPONDING ENG PERFORMANCE. WE WATCHED IT AND CLIMBED TO 16K WHERE ENGINE FF HAD FALLEN TO 4000ILB. LOWER THAN THE LEFT AND NO PERFORMANCE FROM R ENG. (R EPR MAXED OUT) WE DECLARED A PAN AND RETURNED FOR AN UNEVENTFUL LANDING. REPLACED P1 TUBE ASSY IAW AMM 73-21-04-434-045-R00 AND TORQUED IAW AMM 70-51-00-2.