As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 6400 - DCA-LGA - EXTREMELY LOUD NOISE (AIR FLOW) AROUND L-1 DOOR IMMEDIATELY AFTER TAKEOFF. RETURNED TO BASE. PRESSURIZATION INDICATION NORMAL OPERATION. FOUND LOWER DOOR HINGE COVER BENT AND OUT OF ALIGNMENT. INSTALLED NEW HINGE COVER AND REALIGNED. PRESSURIZED AIRCRAFT ON GROUND AND CHECKED FOR AIR LEAK, NONE FOUND. (M)