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Near midair collision between 2 C172's approaching the traffic pattern at 3 mi from a controled airport. TA issued.
| Attributes | |
| ACN | 515877 |
| Time | |
| Date | 200106 |
| Day | Mon |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : sgr.airport |
| State Reference | TX |
| Altitude | msl bound lower : 900 msl bound upper : 1000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : sgr.tower |
| Operator | general aviation : instructional |
| Make Model Name | Skyhawk 172/Cutlass 172 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | descent : approach |
| Route In Use | approach : visual |
| Flight Plan | None |
| Aircraft 2 | |
| Controlling Facilities | tower : sgr.tower |
| Operator | Other |
| Make Model Name | Skyhawk 172/Cutlass 172 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | descent : approach |
| Route In Use | approach : visual |
| Person 1 | |
| Affiliation | other |
| Function | instruction : instructor oversight : pic |
| Qualification | pilot : instrument pilot : commercial pilot : cfi |
| Experience | flight time last 90 days : 150 flight time total : 520 flight time type : 250 |
| ASRS Report | 515877 |
| Person 2 | |
| Affiliation | other |
| Function | instruction : trainee |
| Events | |
| Anomaly | conflict : nmac other anomaly other |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | controller : issued alert controller : issued advisory flight crew : took evasive action |
| Miss Distance | horizontal : 0 vertical : 40 |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
Narrative:
Upon returning to sgr, my student made initial call to sgr tower that we were 8 mi south inbound (distance determined by chart location). Tower instructed us to report 4 mi southeast for the left downwind to runway 17. Shortly thereafter, while we were approximately 7 mi out, aircraft #1 reported 3 mi southeast. I began looking for aircraft #1 about 3 mi ahead of our position (I did not have him in sight). We passed 4 mi (distance determined by chart position) and my student reported to sgr tower shortly thereafter at 3 mi (late call due to radio traffic). I still did not have aircraft #1 in sight, but expected him to be 3 mi ahead based on his previous position report. At this time I alerted my student of his altitude, which was 900 ft MSL (pattern altitude is 1000 ft MSL). Tower then called me saying that traffic was to my right. A few seconds later, I noticed aircraft #1 merging and overtaking us from right to left (heading difference was about 20 degrees). Vertical distance was 40 ft as he passed directly underneath us. I took control of the airplane, and initiated a climbing right turn away from the traffic, falling into a wide downwind outside and behind aircraft #1.
Original NASA ASRS Text
Title: NMAC BTWN 2 C172'S APCHING THE TFC PATTERN AT 3 MI FROM A CTLED ARPT. TA ISSUED.
Narrative: UPON RETURNING TO SGR, MY STUDENT MADE INITIAL CALL TO SGR TWR THAT WE WERE 8 MI S INBOUND (DISTANCE DETERMINED BY CHART LOCATION). TWR INSTRUCTED US TO RPT 4 MI SE FOR THE L DOWNWIND TO RWY 17. SHORTLY THEREAFTER, WHILE WE WERE APPROX 7 MI OUT, ACFT #1 RPTED 3 MI SE. I BEGAN LOOKING FOR ACFT #1 ABOUT 3 MI AHEAD OF OUR POS (I DID NOT HAVE HIM IN SIGHT). WE PASSED 4 MI (DISTANCE DETERMINED BY CHART POS) AND MY STUDENT RPTED TO SGR TWR SHORTLY THEREAFTER AT 3 MI (LATE CALL DUE TO RADIO TFC). I STILL DID NOT HAVE ACFT #1 IN SIGHT, BUT EXPECTED HIM TO BE 3 MI AHEAD BASED ON HIS PREVIOUS POS RPT. AT THIS TIME I ALERTED MY STUDENT OF HIS ALT, WHICH WAS 900 FT MSL (PATTERN ALT IS 1000 FT MSL). TWR THEN CALLED ME SAYING THAT TFC WAS TO MY R. A FEW SECONDS LATER, I NOTICED ACFT #1 MERGING AND OVERTAKING US FROM R TO L (HDG DIFFERENCE WAS ABOUT 20 DEGS). VERT DISTANCE WAS 40 FT AS HE PASSED DIRECTLY UNDERNEATH US. I TOOK CTL OF THE AIRPLANE, AND INITIATED A CLBING R TURN AWAY FROM THE TFC, FALLING INTO A WIDE DOWNWIND OUTSIDE AND BEHIND ACFT #1.
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.