A few years back there was an AD calling for NDT inspection of the radius rod housing bodies for cracks on the J31/32 which if left unchecked could cause the radius rod to fail leaving the gear attached at the bearing housings but potentially not locked down, Seen one which failed in NZ and in that case the gear jammed against the wing skin at the outboard area of the gear bay preventing collapse but wonder in a strong cross wind if the same failure condition could cause the gear to collapse??, assuming the crack issue still remains and has not been modified out. Also seen a J32 land in the states with the brakes locked on one axle, ripped the tyre from the wheel and ground part of the wheel away but the aircraft remained on the tarmac with minor damage so would be surprised if a puncture alone caused the incident.