Narrative:

I was flying aircraft X with my CFI in the right seat. I am a student pilot with class 3 medical and 1.6H solo time. We were practicing crosswind lndgs after a quick run-through of diversions. Ahead of us in the pattern was a remos light sport; flown by an instructor. The remos is slower and was making tight patterns. We had to widen a little to keep from overtaking it. Immediately prior to our departure; a C152 or C172 departed for practice about 15 mi west. Things happened quickly; so I may have the aircraft swapped; but I believe the remos was already on short final. We; in the DA40; were on downwind; first notch of flaps; just descending through 1500 ft; and about to go wing up for base. We hear tower speaking to the cessna. They were returning from the west. The tower cleared them to continue in on base; then turn final. I slowed the DA40 a bit; to about 78 KIAS. The tower asked us to widen our base. We were already near the end of our downwind. At this point; we spot the cessna on a 90 degree collision course. My CFI; took the controls and steeply turned left since turning right would have put us inside the cessna's turns. The cessna made no evasive maneuvers and continued on-course. Afterwards; we turned back and were a little wide and a little downwind. The rest of the approach and landing was uneventful. The cessna and our DA40 came within 50 ft vertical and about 500 ft horizontal.

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Original NASA ASRS Text

Title: STUDENT ABOARD DA40 ON DOWNWIND EXPERIENCES CLOSE ENCOUNTER WITH AN INBOUND CESSNA CLEARED TO ENTER ON THE PATTERN ON BASE LEG.

Narrative: I WAS FLYING ACFT X WITH MY CFI IN THE R SEAT. I AM A STUDENT PLT WITH CLASS 3 MEDICAL AND 1.6H SOLO TIME. WE WERE PRACTICING XWIND LNDGS AFTER A QUICK RUN-THROUGH OF DIVERSIONS. AHEAD OF US IN THE PATTERN WAS A REMOS LIGHT SPORT; FLOWN BY AN INSTRUCTOR. THE REMOS IS SLOWER AND WAS MAKING TIGHT PATTERNS. WE HAD TO WIDEN A LITTLE TO KEEP FROM OVERTAKING IT. IMMEDIATELY PRIOR TO OUR DEP; A C152 OR C172 DEPARTED FOR PRACTICE ABOUT 15 MI W. THINGS HAPPENED QUICKLY; SO I MAY HAVE THE ACFT SWAPPED; BUT I BELIEVE THE REMOS WAS ALREADY ON SHORT FINAL. WE; IN THE DA40; WERE ON DOWNWIND; FIRST NOTCH OF FLAPS; JUST DSNDING THROUGH 1500 FT; AND ABOUT TO GO WING UP FOR BASE. WE HEAR TWR SPEAKING TO THE CESSNA. THEY WERE RETURNING FROM THE W. THE TWR CLRED THEM TO CONTINUE IN ON BASE; THEN TURN FINAL. I SLOWED THE DA40 A BIT; TO ABOUT 78 KIAS. THE TWR ASKED US TO WIDEN OUR BASE. WE WERE ALREADY NEAR THE END OF OUR DOWNWIND. AT THIS POINT; WE SPOT THE CESSNA ON A 90 DEG COLLISION COURSE. MY CFI; TOOK THE CTLS AND STEEPLY TURNED L SINCE TURNING R WOULD HAVE PUT US INSIDE THE CESSNA'S TURNS. THE CESSNA MADE NO EVASIVE MANEUVERS AND CONTINUED ON-COURSE. AFTERWARDS; WE TURNED BACK AND WERE A LITTLE WIDE AND A LITTLE DOWNWIND. THE REST OF THE APCH AND LNDG WAS UNEVENTFUL. THE CESSNA AND OUR DA40 CAME WITHIN 50 FT VERT AND ABOUT 500 FT HORIZ.

Data retrieved from NASA's ASRS site as of May 2009 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.