Narrative:

I was the flight instructor riding in the right seat and the student pilot (pre-solo) was taxiing the small aircraft X to a tie- down space on the ramp. We taxied around the left wing and then in front of the small aircraft Y (parked and unoccupied). I looked down to fold a chart and we contacted the small aircraft Y vertical propeller trailing edge with our right wing leading edge (2 ft inboard) at a speed of about 2-3 mph. Dented X's leading edge about 1.5 inches deep (between wing ribs), notified Y's pilot and visually inspected Y's propeller for damage. No visual or apparent damage to propeller. The problem was discovered by sound of contact. Contributing factors were inattn of myself and inexperience of student. Corrective actions: repair small dent in leading edge and inspect propeller. Student pilot did not have correct perception of wing length or consider propeller tip as a factor.

Google
 

Original NASA ASRS Text

Title: 1 SMA, TAXIING TFC, ENCOUNTERS ANOTHER SMA, PARKED ON RAMP. ACFT DAMAGED.

Narrative: I WAS THE FLT INSTRUCTOR RIDING IN THE R SEAT AND THE STUDENT PLT (PRE-SOLO) WAS TAXIING THE SMA X TO A TIE- DOWN SPACE ON THE RAMP. WE TAXIED AROUND THE L WING AND THEN IN FRONT OF THE SMA Y (PARKED AND UNOCCUPIED). I LOOKED DOWN TO FOLD A CHART AND WE CONTACTED THE SMA Y VERT PROP TRAILING EDGE WITH OUR R WING LEADING EDGE (2 FT INBOARD) AT A SPD OF ABOUT 2-3 MPH. DENTED X'S LEADING EDGE ABOUT 1.5 INCHES DEEP (BTWN WING RIBS), NOTIFIED Y'S PLT AND VISUALLY INSPECTED Y'S PROP FOR DAMAGE. NO VISUAL OR APPARENT DAMAGE TO PROP. THE PROB WAS DISCOVERED BY SOUND OF CONTACT. CONTRIBUTING FACTORS WERE INATTN OF MYSELF AND INEXPERIENCE OF STUDENT. CORRECTIVE ACTIONS: REPAIR SMALL DENT IN LEADING EDGE AND INSPECT PROP. STUDENT PLT DID NOT HAVE CORRECT PERCEPTION OF WING LENGTH OR CONSIDER PROP TIP AS A FACTOR.

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.