As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF A LOUD BANG CAN BE HEARD AND FELT AS THE GEAR HANDLE IS RAISED. LAST TAKEOFF AT -6C WAS THE MOST PRONOUNCED. REMOVED FAULTY BRAKE METERING VALVE AND INSTALLED NEW UNIT. PERFORMED LEAK AND OPS CHECKED GOOD. IAW MM 32-42-03.