Narrative:

As a flight instructor with a student, I was returning from a training flight in an small aircraft X. My student, 8 mi northeast of airport radioed for an advisory. The unicom operator responded with an advisory to use runway 19 at rutland. We continued to position the aircraft for the entry, reported 2 mi west entering on the 45 degree for the downwind. Once on downwind, we made another radio call. Once abeam the numbers at flight crew pattern altitude, I reduced the throttle to idle simulating a power plant failure for my student. My student started a turn towards the runway while I picked up the microphone to announce our intentions. At that point my student yelled and then leveled the wings. Off to our left side appeared an small aircraft Y below us flying away. Small aircraft Y had flown under us from right to left approximately 100-200' away. The small aircraft Y took no notice of us, did not appear to maneuver away, and continued to fly around the airport. We landed, and observed the small aircraft Y fly a right downwind (wrong way) for the runway and proceed to re-enter the correct downwind and land. Upon landing, there was only one person in the aircraft that we observed. This is not the only occurrence that I or other pilots at this airport have encountered with this aircraft. It is a local plane. Please contact me for further information regarding past problems. I have talked to the FAA before and they are not interested in local problems. The aircraft is known not to have a radio or to follow prescribed procedures.

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Original NASA ASRS Text

Title: INSTRUCTOR IN LIGHT ACFT HAS NMAC WITH ANOTHER LIGHT ACFT EXECUTING NON STANDARD PROC AT UNCONTROLLED ARPT.

Narrative: AS A FLT INSTRUCTOR WITH A STUDENT, I WAS RETURNING FROM A TRAINING FLT IN AN SMA X. MY STUDENT, 8 MI NE OF ARPT RADIOED FOR AN ADVISORY. THE UNICOM OPERATOR RESPONDED WITH AN ADVISORY TO USE RWY 19 AT RUTLAND. WE CONTINUED TO POSITION THE ACFT FOR THE ENTRY, REPORTED 2 MI W ENTERING ON THE 45 DEG FOR THE DOWNWIND. ONCE ON DOWNWIND, WE MADE ANOTHER RADIO CALL. ONCE ABEAM THE NUMBERS AT FLT CREW PATTERN ALT, I REDUCED THE THROTTLE TO IDLE SIMULATING A POWER PLANT FAILURE FOR MY STUDENT. MY STUDENT STARTED A TURN TOWARDS THE RWY WHILE I PICKED UP THE MICROPHONE TO ANNOUNCE OUR INTENTIONS. AT THAT POINT MY STUDENT YELLED AND THEN LEVELED THE WINGS. OFF TO OUR LEFT SIDE APPEARED AN SMA Y BELOW US FLYING AWAY. SMA Y HAD FLOWN UNDER US FROM RIGHT TO LEFT APPROX 100-200' AWAY. THE SMA Y TOOK NO NOTICE OF US, DID NOT APPEAR TO MANEUVER AWAY, AND CONTINUED TO FLY AROUND THE ARPT. WE LANDED, AND OBSERVED THE SMA Y FLY A RIGHT DOWNWIND (WRONG WAY) FOR THE RWY AND PROCEED TO RE-ENTER THE CORRECT DOWNWIND AND LAND. UPON LNDG, THERE WAS ONLY ONE PERSON IN THE ACFT THAT WE OBSERVED. THIS IS NOT THE ONLY OCCURRENCE THAT I OR OTHER PLTS AT THIS ARPT HAVE ENCOUNTERED WITH THIS ACFT. IT IS A LOCAL PLANE. PLEASE CONTACT ME FOR FURTHER INFO REGARDING PAST PROBLEMS. I HAVE TALKED TO THE FAA BEFORE AND THEY ARE NOT INTERESTED IN LOCAL PROBLEMS. THE ACFT IS KNOWN NOT TO HAVE A RADIO OR TO FOLLOW PRESCRIBED PROCS.

Data retrieved from NASA's ASRS site as of August 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.