Narrative:

About XA30-XB00 on nov/xa/97, I departed wjf to the north with 2 non pilots on board, turned north and climbed to 3500 ft MSL. At about the limit of wjf class D airspace, I caught something in my peripheral vision to my left. When I looked in that direction I saw another C170 at my 10 O'clock position making an evasive maneuver. I called the tower and asked them if there was any other traffic I should know about. They said that they had one cessna inbound from the north. I told the tower that I had had a near miss with him. On return to wjf, I spoke with the pilot of the other C170. He confirmed that the tower had not called traffic to either aircraft. He also stated that his pilot rated passenger made the first sighting. The problem was caused by a combination of my relinquishing traffic separation responsibility to the tower, and their failure to warn either pilot of a possible conflict. In the future, I will more clearly monitor other aircraft communications with ATC and work to improve my traffic scanning techniques.

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Original NASA ASRS Text

Title: A C170 PLT, DEPARTING WJF, EXPERIENCED AN NMAC WITH ANOTHER C170 ON ARR. THE TWR CTLR DID NOT ADVISE EITHER PLT OF EACH OTHER.

Narrative: ABOUT XA30-XB00 ON NOV/XA/97, I DEPARTED WJF TO THE N WITH 2 NON PLTS ON BOARD, TURNED N AND CLBED TO 3500 FT MSL. AT ABOUT THE LIMIT OF WJF CLASS D AIRSPACE, I CAUGHT SOMETHING IN MY PERIPHERAL VISION TO MY L. WHEN I LOOKED IN THAT DIRECTION I SAW ANOTHER C170 AT MY 10 O'CLOCK POS MAKING AN EVASIVE MANEUVER. I CALLED THE TWR AND ASKED THEM IF THERE WAS ANY OTHER TFC I SHOULD KNOW ABOUT. THEY SAID THAT THEY HAD ONE CESSNA INBOUND FROM THE N. I TOLD THE TWR THAT I HAD HAD A NEAR MISS WITH HIM. ON RETURN TO WJF, I SPOKE WITH THE PLT OF THE OTHER C170. HE CONFIRMED THAT THE TWR HAD NOT CALLED TFC TO EITHER ACFT. HE ALSO STATED THAT HIS PLT RATED PAX MADE THE FIRST SIGHTING. THE PROB WAS CAUSED BY A COMBINATION OF MY RELINQUISHING TFC SEPARATION RESPONSIBILITY TO THE TWR, AND THEIR FAILURE TO WARN EITHER PLT OF A POSSIBLE CONFLICT. IN THE FUTURE, I WILL MORE CLRLY MONITOR OTHER ACFT COMS WITH ATC AND WORK TO IMPROVE MY TFC SCANNING TECHNIQUES.

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.