As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLIMBING THROUGH FL280 HAD PARTIAL LOSS OF POWER ON THE RT ENGINE, POWER LEVERS IN CLIMB. MAX POWER WAS 64.5 % WITH FUEL FLOW OF 360. LT ENG APPROX 85 % & FUEL FLOW AROUND 800. DESCENDING THROUGH FL250 ENG POWER RETURNED TO NORMAL. R & R RT ENG EEC IAW MM 73-20-03. R & R RT ENG FCU IAW MM 73-20-01. PERFORMED REQUIRED CHECKS IAW MM 71-00-00, CHECKS IN LIMITS. FOUND CONTAMINATION, RT FUEL FILTER & FUEL LINES.