A PA44 sustains propeller damage; but the pilot does not know when or how the damage occurred.

Attributes
ACN	647253
Time
Date	200502
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : rvs.airport
State Reference	OK
Environment
Flight Conditions	VMC
Light	Dawn
Aircraft 1
Controlling Facilities	tracon : tul.tracon tower : rvs.tower
Operator	general aviation : instructional
Make Model Name	PA-44 Seminole Turbo Seminole
Operating Under FAR Part	Part 91
Flight Plan	None
Person 1
Affiliation	other
Function	instruction : trainee oversight : pic
Qualification	pilot : cfi
Experience	flight time last 90 days : 192 flight time total : 821 flight time type : 1.2
ASRS Report	647253
Person 2
Affiliation	other
Events
Anomaly	aircraft equipment problem : less severe ground encounters : fod ground encounters other
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Supplementary
Problem Areas	Airport
Primary Problem	Airport

Narrative:

After the training flight ended; it was brought to my attention from another instructor that there was a cut in the right engine's propeller blade. I was not aware of any damage prior to the flight; and had no reason to suspect that anything had happened during the flight. Not knowing what happened brings me to believe maybe that a rock might have been picked up during taxi. I'm still not sure what exactly happened. Maybe paying closer attention to the surface conditions around the aircraft would help in reducing debris from being struck by the propeller.

Original NASA ASRS Text

Title: A PA44 SUSTAINS PROP DAMAGE; BUT THE PLT DOES NOT KNOW WHEN OR HOW THE DAMAGE OCCURRED.

Narrative: AFTER THE TRAINING FLT ENDED; IT WAS BROUGHT TO MY ATTN FROM ANOTHER INSTRUCTOR THAT THERE WAS A CUT IN THE R ENG'S PROP BLADE. I WAS NOT AWARE OF ANY DAMAGE PRIOR TO THE FLT; AND HAD NO REASON TO SUSPECT THAT ANYTHING HAD HAPPENED DURING THE FLT. NOT KNOWING WHAT HAPPENED BRINGS ME TO BELIEVE MAYBE THAT A ROCK MIGHT HAVE BEEN PICKED UP DURING TAXI. I'M STILL NOT SURE WHAT EXACTLY HAPPENED. MAYBE PAYING CLOSER ATTN TO THE SURFACE CONDITIONS AROUND THE ACFT WOULD HELP IN REDUCING DEBRIS FROM BEING STRUCK BY THE PROP.

Data retrieved from NASA's ASRS site as of January 2009 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.