What happened
During an approach to landing, a Cessna 421C lost controlled flight while the crew was being provided with radar vectors. The aircraft subsequently struck the ground. Observers on the ground noted that the engines appeared to be functioning normally prior to the impact.
Findings
An investigation into the crash revealed no mechanical failures or irregularities regarding the aircraft's systems. However, a pilot operating a Boeing 727 at the same airport reported experiencing rapid ice accumulation during a descent occurring less than an hour before the accident. This suggests that severe icing conditions may have been present in the vicinity during the flight phase.