As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT 13000FT 10NM NORTH OF COATE INTERSECTION CREW HEARD A LOUD NOISE FROM L1 ESCAPE HATCH DOOR. NO LOSS OF CABIN PRESSURE OCCURRED AND THE A/C DESCENDED TO 10000FT AND RETURNED BACK TO EWR FOR FURTHER MX INSPECTION. CREW DID NOT DECLARE AN EMERGENCY AND A/C LANDED IN EWR WITHOUT FURTHER INCIDENT.