| After following the controller's instruction, the pilot of DLH411 advised he was climbing the aircraft in response to a TCAS resolution advisory. |
| Neither could it be determined whether the self-test of the TCAS had been carried out before departure or on previous flights on the day of the occurrence. |
| It was also unusually well equipped with the latest avionics, including TCAS II Change 7, TAWS and satcom. |
| Aircraft operating in Class G airspace, without the benefit of ATC traffic advisories, are not required to be equipped with a TCAS or a transponder. |
| Although the TCAS systems were not needed to resolve the conflict between the two flights, they helped the crews visually acquire and monitor their aircraft traffic. |
| All TCAS Resolution Advisories should be collected in the ECCAIRS data base. |
