I am not a lawyer, however in the case of a car crash the deceased's estate is usually sued by the survivors requiring compensation in the event of an at-fault crash. It is my understanding that it is a requirement to sue the at-fault persons before the TAC will pay out their share.
Suicide is a very selfish thing as we all know, but to use someone else's aircraft or vehicle to complete the task is merely only putting unjustified financial pressure on those left behind. If the aircraft is owned by another private party or a club, commercial reality says that costs should be sought.
If one were to have a life insurance policy that was valid (as in held for 12 months prior or the mandatory waiting period), then there may be some financial assistance available for aforementioned circumstance.