As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PLACED GEAR HANDLE TO DOWN POSITION DURING FLIGHT, NOSE GEAR MADE A VERY HARD AND LOUD BANG FOLLOWED BY AN UNUSUAL VIBRATION AND WIND NOISE AT 190KTS. SLOWED BELOW APROX 160KTS THE NOISE & VIBRATION WENT AWAY. REMOVED DEBONDED NOSE GEAR ACTUATOR DOOR CLOSEOUT PANEL IAW MM 32-30-03 & 52-80-20. OPS CHECKED GOOD DURING GEAR SWING.