As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TANK NR 2, PUMP NR 2 SHOWED AMBER AS WE WERE CLEARED FOR T/O AT JFK. TAXIED CLEAR OF 31L AFTER CANCELING T/O CLEARANCE AND RAN ABNORMAL PROCEDURE. T/S TO A BAD PUMP NR 2 PRESS SWITCH TRANSFERRED TO DMI 4852 IAW MEL 28-21-01-C CAT ''C'' PLACARDED MXC NOTIFIED.