Narrative:

After making the VOR a approach at 29D, aircraft was turned upwind in traffic pattern at approximately 600 ft AGL as specified in instrument approach procedures. During upwind and crosswind, aircraft was taken up to traffic pattern altitude and the rest of approach made in VFR conditions. The instrument approach was 'under the hood' with a safety pilot and 1 additional passenger. All position reports were made in pattern, on unicom 122.70 MHZ. No traffic was noted visually or by radio during the approach. After landing, aircraft was pulled onto short taxiway about 3000 ft from approach end and 'cleaned' up. Out of the corner of my eye, I noted another aircraft off the side of the runway in the mud and grass. As I got out of my airplane, several people came out of the airport office building and informed me that another airplane had almost hit me from behind. A student pilot was flying the other aircraft. He stated that his plane had lost power (probably due to carburetor icing). The student was on a solo cross country and was trying to reach the nearest airport. A check of his plane showed he was on 122.80 (not local frequency). Student's description indicated he came in high and fast. He apparently did not use proper unicom frequency, and approached airport from right base position. Neither myself, safety pilot, nor passenger observed student's plane. Observers on ground also stated that they heard no communications on unicom frequency from student's aircraft.

Related reports:

Google
 

Original NASA ASRS Text

Title: PLT OF SMA PVT ACFT HAD AN NMAC WITH ANOTHER ACFT ON AN EMER LNDG DUE TO ENG FAILURE;

Narrative: AFTER MAKING THE VOR A APCH AT 29D, ACFT WAS TURNED UPWIND IN TFC PATTERN AT APPROX 600 FT AGL AS SPECIFIED IN INST APCH PROCS. DURING UPWIND AND XWIND, ACFT WAS TAKEN UP TO TFC PATTERN ALT AND THE REST OF APCH MADE IN VFR CONDITIONS. THE INST APCH WAS 'UNDER THE HOOD' WITH A SAFETY PLT AND 1 ADDITIONAL PAX. ALL POS RPTS WERE MADE IN PATTERN, ON UNICOM 122.70 MHZ. NO TFC WAS NOTED VISUALLY OR BY RADIO DURING THE APCH. AFTER LNDG, ACFT WAS PULLED ONTO SHORT TAXIWAY ABOUT 3000 FT FROM APCH END AND 'CLEANED' UP. OUT OF THE CORNER OF MY EYE, I NOTED ANOTHER ACFT OFF THE SIDE OF THE RWY IN THE MUD AND GRASS. AS I GOT OUT OF MY AIRPLANE, SEVERAL PEOPLE CAME OUT OF THE ARPT OFFICE BUILDING AND INFORMED ME THAT ANOTHER AIRPLANE HAD ALMOST HIT ME FROM BEHIND. A STUDENT PLT WAS FLYING THE OTHER ACFT. HE STATED THAT HIS PLANE HAD LOST PWR (PROBABLY DUE TO CARB ICING). THE STUDENT WAS ON A SOLO XCOUNTRY AND WAS TRYING TO REACH THE NEAREST ARPT. A CHK OF HIS PLANE SHOWED HE WAS ON 122.80 (NOT LCL FREQ). STUDENT'S DESCRIPTION INDICATED HE CAME IN HIGH AND FAST. HE APPARENTLY DID NOT USE PROPER UNICOM FREQ, AND APCHED ARPT FROM R BASE POS. NEITHER MYSELF, SAFETY PLT, NOR PAX OBSERVED STUDENT'S PLANE. OBSERVERS ON GND ALSO STATED THAT THEY HEARD NO COMS ON UNICOM FREQ FROM STUDENT'S ACFT.

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.