Narrative:

On departure from ont in ca, on the prado 2 departure we were climbing out through approximately 7500' (I was flying head in the cockpit at the time) when the captain and F/east both noticed an aircraft (possibly an small transport) very close to our altitude pass to our left. It had passed right to left in front of us and appeared to be descending. The captain told the controller that he had just gone by and the controller asked 'yes I see him now, sorry I missed the call.' it was very hazy out and we were very busy complying with the restrictions on the departure and the controller was very busy with traffic. Perhaps an easier SID in an area like this would be helpful so pilots can remain 'heads up' more and the controller seemed quite overloaded at the time.

Google
 

Original NASA ASRS Text

Title: ACR ON SID HAS CONFLICT WITH SMT. TRAFFIC NOT CALLED.

Narrative: ON DEP FROM ONT IN CA, ON THE PRADO 2 DEP WE WERE CLBING OUT THROUGH APPROX 7500' (I WAS FLYING HEAD IN THE COCKPIT AT THE TIME) WHEN THE CAPT AND F/E BOTH NOTICED AN ACFT (POSSIBLY AN SMT) VERY CLOSE TO OUR ALT PASS TO OUR L. IT HAD PASSED R TO L IN FRONT OF US AND APPEARED TO BE DSNDING. THE CAPT TOLD THE CTLR THAT HE HAD JUST GONE BY AND THE CTLR ASKED 'YES I SEE HIM NOW, SORRY I MISSED THE CALL.' IT WAS VERY HAZY OUT AND WE WERE VERY BUSY COMPLYING WITH THE RESTRICTIONS ON THE DEP AND THE CTLR WAS VERY BUSY WITH TFC. PERHAPS AN EASIER SID IN AN AREA LIKE THIS WOULD BE HELPFUL SO PLTS CAN REMAIN 'HEADS UP' MORE AND THE CTLR SEEMED QUITE OVERLOADED AT THE TIME.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.