As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 2 ENGINE GAVE NORMAL INDICATIONS UNTIL ADDING POWER ABOVE 85%. ENGINE DID NOT GO MORE THAN 85%, BUT MATCHED ENGINE #1 IN ALL INDICATIONS WITH N1 RPM MATCHING. AIR TURNBACK. THE DIFFERENCE BETWEEN THROTTLE POSITION AND ACTUAL N1 DECREASED AS WE CLIMBED. BEFORE LANDING AT 4000FT. MSL THE SAME ISSUE RETURNED. R&R FUEL PUMP PACKAGE IAW MM.