Narrative:

Dec/xa/99 at approximately XA30, I was the instructor pilot in skyhawk flying with the holder of a private pilot certificate who was undergoing instruction for an instrument rating. We were concluding the lesson having just shot a VOR approach, under VFR conditions, to the camarillo airport. At ceece intersection, we were instructed to contact cma tower on 128.2. This was accomplished. Cma tower advised us to enter a right downwind for runway 8. The student was satisfactorily holding the final approach course and descending at approximately 500 FPM. This was complicated by a strong wind out of the northeast at 30+ KTS or better. I pulled the student out from under the view limiting device at 1100 ft and instructed him to enter right traffic for runway 8. He leveled off at 1000 ft, entered a right downwind, and started to slow down prior to extending his flaps. On the downwind, slightly east of the tower and over the freeway, we were advised of traffic on final. We were looking for this traffic when all of a sudden a high wing C172 was observed climbing to our altitude and turning left. The right wing was up and the aircraft was positioned at approximately 45 degrees, heading towards the downwind. At this angle and wing up position, it would have been impossible for the pilot to see us. We took evasive action and the aircraft passed within 500 ft of our position. Cma tower never advised us of the traffic. The pilot of the other aircraft was in a turn and did not see us. I called tower and told them of the traffic. A voice (not idented) came on the air and said to the effect that he didn't see us. We completed our traffic pattern and full stop landing without further incident. I called cma tower at approximately XB30 and spoke with the controller on duty when this incident occurred. He said that he clearly remembered the incident and that he had called the other aircraft but had to do something else at the time so he didn't call us. In my opinion this is not a satisfactory answer. The other aircraft had no opportunity to see us due to his position in the turn. My belief is that the controller was grossly negligent in not notifying us of the potential near miss. As per the tower's previous instructions we were looking on the final approach course for the traffic that had been called. We had no reason to scan the runway for traffic taking off and turning left. The traffic taking off was in a turn and climbing into a wind in excess of 35 KTS. This greatly slowed the aircraft down and allowed it to climb up faster over the ground. I told the tower controller that I wanted him to file a near midair collision report. He stated this would be done. This is the second near midair collision I have been involved with at the cma airport within the past 60 days. I strongly suggest that competent supervision and controllers be assigned to this tower. This is a busy GA tower. The chances for a tragedy occurring are great, and in my opinion increasing daily.

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Original NASA ASRS Text

Title: NMAC BTWN 2 C172'S ON THE DOWNWIND LEG AT THE CMA CTLED ARPT.

Narrative: DEC/XA/99 AT APPROX XA30, I WAS THE INSTRUCTOR PLT IN SKYHAWK FLYING WITH THE HOLDER OF A PVT PLT CERTIFICATE WHO WAS UNDERGOING INSTRUCTION FOR AN INST RATING. WE WERE CONCLUDING THE LESSON HAVING JUST SHOT A VOR APCH, UNDER VFR CONDITIONS, TO THE CAMARILLO ARPT. AT CEECE INTXN, WE WERE INSTRUCTED TO CONTACT CMA TWR ON 128.2. THIS WAS ACCOMPLISHED. CMA TWR ADVISED US TO ENTER A R DOWNWIND FOR RWY 8. THE STUDENT WAS SATISFACTORILY HOLDING THE FINAL APCH COURSE AND DSNDING AT APPROX 500 FPM. THIS WAS COMPLICATED BY A STRONG WIND OUT OF THE NE AT 30+ KTS OR BETTER. I PULLED THE STUDENT OUT FROM UNDER THE VIEW LIMITING DEVICE AT 1100 FT AND INSTRUCTED HIM TO ENTER R TFC FOR RWY 8. HE LEVELED OFF AT 1000 FT, ENTERED A R DOWNWIND, AND STARTED TO SLOW DOWN PRIOR TO EXTENDING HIS FLAPS. ON THE DOWNWIND, SLIGHTLY E OF THE TWR AND OVER THE FREEWAY, WE WERE ADVISED OF TFC ON FINAL. WE WERE LOOKING FOR THIS TFC WHEN ALL OF A SUDDEN A HIGH WING C172 WAS OBSERVED CLBING TO OUR ALT AND TURNING L. THE R WING WAS UP AND THE ACFT WAS POSITIONED AT APPROX 45 DEGS, HDG TOWARDS THE DOWNWIND. AT THIS ANGLE AND WING UP POS, IT WOULD HAVE BEEN IMPOSSIBLE FOR THE PLT TO SEE US. WE TOOK EVASIVE ACTION AND THE ACFT PASSED WITHIN 500 FT OF OUR POS. CMA TWR NEVER ADVISED US OF THE TFC. THE PLT OF THE OTHER ACFT WAS IN A TURN AND DID NOT SEE US. I CALLED TWR AND TOLD THEM OF THE TFC. A VOICE (NOT IDENTED) CAME ON THE AIR AND SAID TO THE EFFECT THAT HE DIDN'T SEE US. WE COMPLETED OUR TFC PATTERN AND FULL STOP LNDG WITHOUT FURTHER INCIDENT. I CALLED CMA TWR AT APPROX XB30 AND SPOKE WITH THE CTLR ON DUTY WHEN THIS INCIDENT OCCURRED. HE SAID THAT HE CLRLY REMEMBERED THE INCIDENT AND THAT HE HAD CALLED THE OTHER ACFT BUT HAD TO DO SOMETHING ELSE AT THE TIME SO HE DIDN'T CALL US. IN MY OPINION THIS IS NOT A SATISFACTORY ANSWER. THE OTHER ACFT HAD NO OPPORTUNITY TO SEE US DUE TO HIS POS IN THE TURN. MY BELIEF IS THAT THE CTLR WAS GROSSLY NEGLIGENT IN NOT NOTIFYING US OF THE POTENTIAL NEAR MISS. AS PER THE TWR'S PREVIOUS INSTRUCTIONS WE WERE LOOKING ON THE FINAL APCH COURSE FOR THE TFC THAT HAD BEEN CALLED. WE HAD NO REASON TO SCAN THE RWY FOR TFC TAKING OFF AND TURNING L. THE TFC TAKING OFF WAS IN A TURN AND CLBING INTO A WIND IN EXCESS OF 35 KTS. THIS GREATLY SLOWED THE ACFT DOWN AND ALLOWED IT TO CLB UP FASTER OVER THE GND. I TOLD THE TWR CTLR THAT I WANTED HIM TO FILE A NMAC RPT. HE STATED THIS WOULD BE DONE. THIS IS THE SECOND NMAC I HAVE BEEN INVOLVED WITH AT THE CMA ARPT WITHIN THE PAST 60 DAYS. I STRONGLY SUGGEST THAT COMPETENT SUPERVISION AND CTLRS BE ASSIGNED TO THIS TWR. THIS IS A BUSY GA TWR. THE CHANCES FOR A TRAGEDY OCCURRING ARE GREAT, AND IN MY OPINION INCREASING DAILY.

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.