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Pilot of small aircraft descending toward 36WI has near midair collision with another small aircraft that overflew him from his 8 O'clock.
| Attributes | |
| ACN | 142620 |
| Time | |
| Date | 199004 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : lse airport : 36wi |
| State Reference | WI |
| Altitude | msl bound lower : 3200 msl bound upper : 3200 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | general aviation : personal |
| Make Model Name | Small Aircraft, Low Wing, 1 Eng, Fixed Gear |
| Flight Phase | descent other |
| Flight Plan | None |
| Aircraft 2 | |
| Make Model Name | Small Aircraft, High Wing, 1 Eng, Fixed Gear |
| Flight Phase | cruise other |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Qualification | pilot : private |
| Experience | flight time last 90 days : 30 flight time total : 230 flight time type : 100 |
| ASRS Report | 142620 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Qualification | pilot : private |
| Events | |
| Anomaly | conflict : nmac |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 200 vertical : 20 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
Narrative:
I was en route from odi into new holland airpark and had an airspeed of 80 mph and was descending at about 200'/FPM to pattern altitude at new holland approximately 1700' MSL. I was crossing the western edge of the mississippi river and was listening to winona unicom for possible traffic. The other airplane, a larger high wing single engine, was descending and was noticed over and slightly in front of my left wing. Initially the other airplane seemed much higher, but by the time I had recognized a problem (2-3 seconds) I had to make an abrupt descending right turn. The difference in terrain perhaps caused me to misjudge the other aircraft's altitude as well. The high rate of closure also was probably a contributing factor in my hesitation. I don't believe the other aircraft saw me at all probably due to the blind spot created by his engine cowling. I also believe his speed was much greater than mine.
Original NASA ASRS Text
Title: PLT OF SMA DESCENDING TOWARD 36WI HAS NMAC WITH ANOTHER SMA THAT OVERFLEW HIM FROM HIS 8 O'CLOCK.
Narrative: I WAS ENRTE FROM ODI INTO NEW HOLLAND AIRPARK AND HAD AN AIRSPD OF 80 MPH AND WAS DSNDING AT ABOUT 200'/FPM TO PATTERN ALT AT NEW HOLLAND APPROX 1700' MSL. I WAS XING THE WESTERN EDGE OF THE MISSISSIPPI RIVER AND WAS LISTENING TO WINONA UNICOM FOR POSSIBLE TFC. THE OTHER AIRPLANE, A LARGER HIGH WING SINGLE ENG, WAS DSNDING AND WAS NOTICED OVER AND SLIGHTLY IN FRONT OF MY L WING. INITIALLY THE OTHER AIRPLANE SEEMED MUCH HIGHER, BUT BY THE TIME I HAD RECOGNIZED A PROB (2-3 SECS) I HAD TO MAKE AN ABRUPT DSNDING R TURN. THE DIFFERENCE IN TERRAIN PERHAPS CAUSED ME TO MISJUDGE THE OTHER ACFT'S ALT AS WELL. THE HIGH RATE OF CLOSURE ALSO WAS PROBABLY A CONTRIBUTING FACTOR IN MY HESITATION. I DON'T BELIEVE THE OTHER ACFT SAW ME AT ALL PROBABLY DUE TO THE BLIND SPOT CREATED BY HIS ENG COWLING. I ALSO BELIEVE HIS SPD WAS MUCH GREATER THAN MINE.
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.