Narrative:

King air entered traffic pattern on left downwind leg for runway 2R at pdk airport. When established on left base leg for runway 2R, a high wing cessna suddenly reported to the tower that he had to dive, in a left turn to base leg for runway 2L, to avoid a king air on a left base leg for runway 2R. The cessna reported a near miss. The tower informed me, in the king air, that a cessna, on my left, had to dive to avoid me, while he was turning his left base leg to runway 2L. I was established on my left base leg to runway 2R. The tower never pointed out conflicting traffic to me, and I informed the tower that I never saw the traffic, after the tower informed me of the reported near miss. Factors contributing to the situation are: left base legs to parallel runways at a busy airport, control tower not pointing out cessna traffic to the king air. The king air had previously been cleared to land on runway 2R by the tower, but never saw the cessna, because that traffic was not reported to the king air. Suggestions to prevent reoccurrence are better ATC and communication, establish left traffic pattern and right traffic pattern for parallel runways.

Related reports:

Google
 

Original NASA ASRS Text

Title: A KING AIR, ON THE L BASE LEG FOR RWY 2R AT PDK, EXPERIENCED AN NMAC WITH A CESSNA ON L BASE LEG FOR RWY 2L.

Narrative: KING AIR ENTERED TFC PATTERN ON L DOWNWIND LEG FOR RWY 2R AT PDK ARPT. WHEN ESTABLISHED ON L BASE LEG FOR RWY 2R, A HIGH WING CESSNA SUDDENLY RPTED TO THE TWR THAT HE HAD TO DIVE, IN A L TURN TO BASE LEG FOR RWY 2L, TO AVOID A KING AIR ON A L BASE LEG FOR RWY 2R. THE CESSNA RPTED A NEAR MISS. THE TWR INFORMED ME, IN THE KING AIR, THAT A CESSNA, ON MY L, HAD TO DIVE TO AVOID ME, WHILE HE WAS TURNING HIS L BASE LEG TO RWY 2L. I WAS ESTABLISHED ON MY L BASE LEG TO RWY 2R. THE TWR NEVER POINTED OUT CONFLICTING TFC TO ME, AND I INFORMED THE TWR THAT I NEVER SAW THE TFC, AFTER THE TWR INFORMED ME OF THE RPTED NEAR MISS. FACTORS CONTRIBUTING TO THE SIT ARE: L BASE LEGS TO PARALLEL RWYS AT A BUSY ARPT, CTL TWR NOT POINTING OUT CESSNA TFC TO THE KING AIR. THE KING AIR HAD PREVIOUSLY BEEN CLRED TO LAND ON RWY 2R BY THE TWR, BUT NEVER SAW THE CESSNA, BECAUSE THAT TFC WAS NOT RPTED TO THE KING AIR. SUGGESTIONS TO PREVENT REOCCURRENCE ARE BETTER ATC AND COM, ESTABLISH L TFC PATTERN AND R TFC PATTERN FOR PARALLEL RWYS.

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.