Narrative:

I departed H41, mo, sep/xa/97 XA30Z direct to hot, 188 degree heading at 4500 ft MSL, 120 KTS. Using a kansas city current sectional and my GPS my mode C encoder squawking 1200. When I was about 10 mi northwest of tbn at XB10Z, I monitored forney ATIS 118.7, which declared forney closed. Therefore, I would expect minimum traffic in the area. My route passed 10 mi west of tbn, 3 mi west of the west edge of R4501, 1 mi west of cannon B MOA western edge. But through cannon a MOA, kansas city sectional lists all of the above areas as not used on sundays. As I approached the north edge of cannon a MOA, I observed an A10 warthog passing below me at 2500 ft MSL on a 350 degree heading. I thought 'what a nice airplane.' 20 seconds later, I observed the same aircraft passing me at my altitude about 1000 ft to my right. It continued to pass me and about 1 mi in front of me made a violent maneuver and dove for the ground. 'How strange.' no sooner had that thought passed when I hit his wash. I thought my aircraft would come apart. I'm sure there are some that would. I decided not to share this airspace and immediately turned to a 270 degree heading and held that for 10 mi. At that time I resumed my previous route. I did not observe the A10 after the incident. I did not feel at any time that I would collide with another aircraft. I did feel that the action that took place was intentional and wondered how would any one explain an aircraft coming apart in midair, in this airspace. I feel that the above was as accurate as I remember it. I also would like to state that at no time did I deviate more than .3 mi from my route prior to this action. Also, if other aircraft were to be denied this area, the ATIS could have so stated.

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Original NASA ASRS Text

Title: THE PLT OF AN SMA RPTS A WAKE ENCOUNTER INVOLVING AN A10 IN THE CANNON A MOA ON A SUNDAY MORNING. HE SAW THE A10, BUT WAS UNABLE TO AVOID ITS WAKE WHEN IT CROSSED IN FRONT OF HIM IN WHAT, APPARENTLY, WAS A TACTICAL MANEUVER. THE MOA WAS SUPPOSED TO BE CLOSED ON SUNDAYS UNLESS NOTAMED OTHERWISE.

Narrative: I DEPARTED H41, MO, SEP/XA/97 XA30Z DIRECT TO HOT, 188 DEG HDG AT 4500 FT MSL, 120 KTS. USING A KANSAS CITY CURRENT SECTIONAL AND MY GPS MY MODE C ENCODER SQUAWKING 1200. WHEN I WAS ABOUT 10 MI NW OF TBN AT XB10Z, I MONITORED FORNEY ATIS 118.7, WHICH DECLARED FORNEY CLOSED. THEREFORE, I WOULD EXPECT MINIMUM TFC IN THE AREA. MY RTE PASSED 10 MI W OF TBN, 3 MI W OF THE W EDGE OF R4501, 1 MI W OF CANNON B MOA WESTERN EDGE. BUT THROUGH CANNON A MOA, KANSAS CITY SECTIONAL LISTS ALL OF THE ABOVE AREAS AS NOT USED ON SUNDAYS. AS I APCHED THE N EDGE OF CANNON A MOA, I OBSERVED AN A10 WARTHOG PASSING BELOW ME AT 2500 FT MSL ON A 350 DEG HDG. I THOUGHT 'WHAT A NICE AIRPLANE.' 20 SECONDS LATER, I OBSERVED THE SAME ACFT PASSING ME AT MY ALT ABOUT 1000 FT TO MY R. IT CONTINUED TO PASS ME AND ABOUT 1 MI IN FRONT OF ME MADE A VIOLENT MANEUVER AND DOVE FOR THE GND. 'HOW STRANGE.' NO SOONER HAD THAT THOUGHT PASSED WHEN I HIT HIS WASH. I THOUGHT MY ACFT WOULD COME APART. I'M SURE THERE ARE SOME THAT WOULD. I DECIDED NOT TO SHARE THIS AIRSPACE AND IMMEDIATELY TURNED TO A 270 DEG HDG AND HELD THAT FOR 10 MI. AT THAT TIME I RESUMED MY PREVIOUS RTE. I DID NOT OBSERVE THE A10 AFTER THE INCIDENT. I DID NOT FEEL AT ANY TIME THAT I WOULD COLLIDE WITH ANOTHER ACFT. I DID FEEL THAT THE ACTION THAT TOOK PLACE WAS INTENTIONAL AND WONDERED HOW WOULD ANY ONE EXPLAIN AN ACFT COMING APART IN MIDAIR, IN THIS AIRSPACE. I FEEL THAT THE ABOVE WAS AS ACCURATE AS I REMEMBER IT. I ALSO WOULD LIKE TO STATE THAT AT NO TIME DID I DEVIATE MORE THAN .3 MI FROM MY RTE PRIOR TO THIS ACTION. ALSO, IF OTHER ACFT WERE TO BE DENIED THIS AREA, THE ATIS COULD HAVE SO STATED.

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.