What was found
RETURN TO FIELD DUE TO LOUD NOISE BY DOOR 1R. ON SECOND ATTEMPT LOUD BANGING DETECTED FROM DOORS 1R AND 1L. APPEARS TO BE NORMAL NOISES FROM FUSELAGE DURING TAKEOFF AND CLIMB. ENGINEERING FLIGHT TEST CREW SHOWED NOTHING ABNORMAL.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
RETURN TO FIELD DUE TO LOUD NOISE BY DOOR 1R. ON SECOND ATTEMPT LOUD BANGING DETECTED FROM DOORS 1R AND 1L. APPEARS TO BE NORMAL NOISES FROM FUSELAGE DURING TAKEOFF AND CLIMB. ENGINEERING FLIGHT TEST CREW SHOWED NOTHING ABNORMAL.