As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PHL FLT 1526 EN ROUTE CLT TO PHL. R ENG WILL NOT ATTAIN CLB THRUST FROM APPROX FL260 AND HIGHER WITH THRUST LEVER FULL FWD TRAVEL. N1 APPROX 1 PERCENT BELOW CLB THRUST WITH THRUST LEVER STAGGER OVER 1 THROTTLE WIDTH. REPLACED RT ENG EEC HARNESS DUE TO CHAFE, AND REPLACED RT ENG EEC. ACCOMPLISHED MEC ADJUSTMENT AND EEC/PMC INTERFACE TEST. ALL PARAMETERS OK.