Near midair collision between two smas below TCA.

Attributes
ACN	197476
Time
Date	199112
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : cps
State Reference	MO
Altitude	msl bound lower : 1600 msl bound upper : 1600
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : olm
Operator	general aviation : personal
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Fixed Gear
Flight Phase	cruise other
Flight Plan	None
Aircraft 2
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Fixed Gear
Flight Phase	descent other
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : private pilot : instrument
Experience	flight time last 90 days : 12 flight time total : 552 flight time type : 400
ASRS Report	197476
Person 2
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : private
Events
Anomaly	conflict : nmac other anomaly other
Independent Detector	other other : unspecified cockpit
Resolutory Action	flight crew : took evasive action
Consequence	Other
Miss Distance	horizontal : 0 vertical : 100
Supplementary
Primary Problem	Flight Crew Human Performance

Narrative:

I was level at 1600 ft MSL heading 360 degree had just received frequency change from cps tower saw an small aircraft B opposite direction 12:00 appeared to be descending rapidly and converging (about 700-800 ft away when first noticed). Took evasive action by diving 20 degrees of pitch. Aircraft passed above me approximately 100 ft. Other aircraft never gave indication that he saw me. Mode C operating at the time, not under ATC control. Other aircraft was likely obscured by my cabin roof and or center windshield column until spotted. Other aircraft was heading into the sun and my aircraft may have been in his glare. Also the incident took place over granite city, il, an area with extensive and contrasting ground features. It may have been hard for him to distinguish among this.

Original NASA ASRS Text

Title: NMAC BTWN TWO SMAS BELOW TCA.

Narrative: I WAS LEVEL AT 1600 FT MSL HDG 360 DEG HAD JUST RECEIVED FREQ CHANGE FROM CPS TWR SAW AN SMA B OPPOSITE DIRECTION 12:00 APPEARED TO BE DSNDING RAPIDLY AND CONVERGING (ABOUT 700-800 FT AWAY WHEN FIRST NOTICED). TOOK EVASIVE ACTION BY DIVING 20 DEGS OF PITCH. ACFT PASSED ABOVE ME APPROX 100 FT. OTHER ACFT NEVER GAVE INDICATION THAT HE SAW ME. MODE C OPERATING AT THE TIME, NOT UNDER ATC CTL. OTHER ACFT WAS LIKELY OBSCURED BY MY CABIN ROOF AND OR CENTER WINDSHIELD COLUMN UNTIL SPOTTED. OTHER ACFT WAS HDG INTO THE SUN AND MY ACFT MAY HAVE BEEN IN HIS GLARE. ALSO THE INCIDENT TOOK PLACE OVER GRANITE CITY, IL, AN AREA WITH EXTENSIVE AND CONTRASTING GND FEATURES. IT MAY HAVE BEEN HARD FOR HIM TO DISTINGUISH AMONG THIS.

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.