As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LGA - FLT 4727 - EN ROUTE, THE LEFT ENGINE SPOOLED TO 40 PERCENT N1. THE FLIGHT CREW SECURED THE ENGINE AND DIVERTED TO SWF LANDING WITHOUT INCIDENT. MAINTENANCE WAS NOTIFIED AND DISPATCHED TO THE AIRCRAFT. MAINTENANCE FOUND THE PY LINE BETWEEN THE FCU AND P3 FILTER HAD CRACKED. THE LINE WAS REPLACED AND THE AIRCRAFT RETURNED TO SERVICE. (X)