What was found
AFTER GEAR RETRACTION ON T/O, HEARD LOUD BANGING NOISE COMING FROM NOSE WHEEL AREA. SOUND LASTED 3 TO 5 MIN THEN EXTINGUISHED. DURING WHICH NOSE DOOR OPEN WARNING MSG WAS ON. INSP NOSE GEAR AREA, DOORS, NOSE GEAR, NO DAMAGE NOTED. INSP FUSELAGE, ENGS AND ENG INLETS, NO DAMAGE NOTED. TAXIED ACFT, NO MALFUNCTIONS NOTED. (K)