As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA - ON FLIGHT 2398, AFTER START WITH BLEED SELECTOR ON NORM OR MAX F/A REPORTED LOUD WHISTLING NOISE FROM SERVICE DOOR. MAINTENANCE ADJUSTED RIGHT AFT SERVICE DOOR VENT DOOR MECHANISM. OPERATIONAL CHECK GOOD. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.