PA-28 Cherokee/Archer/Dakota/Pillan/Warrior
Flight Crew Commercial; Flight Crew Flight Instructor
Communication Breakdown
Conflict NMAC
General None Reported / Taken
Airport; Human Factors
We were climbing out from CHD and setting up an approach into CGZ. The traffic alerting system was not working at the time. While setting up the GPS I looked up and saw another aircraft (a PA-44) over head less than 500 feet. By the time of recognition the PA-44 had already passed. There was no communication between the two aircraft. Aircraft 2 was inbound to CHD and in a descent.
An instructor pilot aboard a PA-28 suffered an NMAC with an inbound PA-44 while departing CHD to the south.