As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
JFK - FLT 657 - WHEN CLIMB RATE WAS SELECTED, NR 1 ENGINE WOULD NOT DEVELOP CLIMB POWER. RETURNED TO JFK AND LANDED WITHOUT INCIDENT. REPLACED NR 1 ENGINE. ACCOMPLISHED ENGINE RUN AND LEAK CHECKED NORMAL. SYSTEM GROUND CHECKED NORMAL OPERATION. OPERATIONAL CHECKED WITH NO DEFECTS. (M)