C150 with instructor aboard has near midair collision with C172 in pattern at uncontrolled airport.

Attributes
ACN	333707
Time
Date	199604
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : shd
State Reference	VA
Altitude	agl bound lower : 100 agl bound upper : 100
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	Cessna 150
Operating Under FAR Part	Part 91
Flight Phase	descent : approach landing other
Flight Plan	None
Aircraft 2
Make Model Name	Skyhawk 172/Cutlass 172
Operating Under FAR Part	Part 91
Flight Phase	climbout : takeoff
Person 1
Affiliation	Other
Function	instruction : instructor
Qualification	pilot : cfi pilot : commercial
Experience	flight time last 90 days : 150 flight time total : 700 flight time type : 500
ASRS Report	333707
Person 2
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : student
Events
Anomaly	conflict : nmac other spatial deviation
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 300 vertical : 400
Supplementary
Primary Problem	Aircraft

Narrative:

The events that occurred are as follows. C150 practicing takeoff/lndgs on runway 5. The winds were at a 90 degree angle and variable. Active runway was runway 5. C150 made a full stop landing and was taxiing back for takeoff. While taxiing a tail dragger was seen landing on runway 5. We then proceeded to takeoff for another pattern run. We never heard or saw any other aircraft at or near the airport. We turned final (short final) and saw another aircraft, a C172 departing runway 23. Both aircraft diverted to the right and continued on the flight paths. We parked the aircraft and inquired to unicom on the events. Due to an unknown radio problem in our aircraft, the position reports were never heard. We were on downwind for runway 5 when unicom switched the active to runway 23. Unicom was not aware that we were using runway 5. Therefore neither aircraft were heard or even seen. The other plane, the C172, was never seen by us, C150, due to blind spots, crossing, and color of wings and airframe. C172 seemed to blend into the background of the landscape. At no time were there 2 aircraft occupying the same runway. At no time was safety an imminent problem, and the event was reported as radio trouble. I feel this should be reported because it may happen again, at uncontrolled airports with aircraft that do not have radio capability or are experiencing radio failure.

Original NASA ASRS Text

Title: C150 WITH INSTRUCTOR ABOARD HAS NMAC WITH C172 IN PATTERN AT UNCTLED ARPT.

Narrative: THE EVENTS THAT OCCURRED ARE AS FOLLOWS. C150 PRACTICING TKOF/LNDGS ON RWY 5. THE WINDS WERE AT A 90 DEG ANGLE AND VARIABLE. ACTIVE RWY WAS RWY 5. C150 MADE A FULL STOP LNDG AND WAS TAXIING BACK FOR TKOF. WHILE TAXIING A TAIL DRAGGER WAS SEEN LNDG ON RWY 5. WE THEN PROCEEDED TO TKOF FOR ANOTHER PATTERN RUN. WE NEVER HEARD OR SAW ANY OTHER ACFT AT OR NEAR THE ARPT. WE TURNED FINAL (SHORT FINAL) AND SAW ANOTHER ACFT, A C172 DEPARTING RWY 23. BOTH ACFT DIVERTED TO THE R AND CONTINUED ON THE FLT PATHS. WE PARKED THE ACFT AND INQUIRED TO UNICOM ON THE EVENTS. DUE TO AN UNKNOWN RADIO PROB IN OUR ACFT, THE POS RPTS WERE NEVER HEARD. WE WERE ON DOWNWIND FOR RWY 5 WHEN UNICOM SWITCHED THE ACTIVE TO RWY 23. UNICOM WAS NOT AWARE THAT WE WERE USING RWY 5. THEREFORE NEITHER ACFT WERE HEARD OR EVEN SEEN. THE OTHER PLANE, THE C172, WAS NEVER SEEN BY US, C150, DUE TO BLIND SPOTS, XING, AND COLOR OF WINGS AND AIRFRAME. C172 SEEMED TO BLEND INTO THE BACKGROUND OF THE LANDSCAPE. AT NO TIME WERE THERE 2 ACFT OCCUPYING THE SAME RWY. AT NO TIME WAS SAFETY AN IMMINENT PROB, AND THE EVENT WAS RPTED AS RADIO TROUBLE. I FEEL THIS SHOULD BE RPTED BECAUSE IT MAY HAPPEN AGAIN, AT UNCTLED ARPTS WITH ACFT THAT DO NOT HAVE RADIO CAPABILITY OR ARE EXPERIENCING RADIO FAILURE.

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.