Incident: Missing Aircraft (fatalities), DRC

A WFP-chartered light plane was reported missing in eastern Democratic Republic of Congo. If your office uses chartered aircraft, does your safety and security plan address things like "flight following" (having the pilot periodically radio in a current location), overdue procedures, and safety checks (the aircraft has been recently inspected, the pilot has valid credentials, the aircraft is carrying sufficient emergency and survival gear, etc.)?

5/6/06 Update - Rescuers found the crashed plane and the bodies of all three on board. Condolences to family, friends, and colleagues.