As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB OUT AT APPROXIMATELY FL 240 FA REPORTED LOUD HISSING SOUND FROM DOOR L2 ASSOCIATED WITH CURRENT MEL FOR DOOR L2. RETURNED TO FIELD. LANDING UNEVENTFUL. REMOVED FROM SERVICE. PERFORMED PRESSURIZATION LEAKAGE TEST REF AMM TASK 21-31-00-720-802-A. TEST GOOD. NO NOISE NOTED FROM AFT PAX DOOR(L2). AIRCRAFT RETURNED TO SERVICE.