Narrative:

During landing roll out on runway xx; as we approached taxiway a; decelerating toward 60 kts we felt a firm thump; as if the aircraft rolled over something or struck something. This was also noticed by our flight attendant who was seated in the cabin. Nothing obvious was apparent from the aircraft's condition; so we taxied to the ramp. After deplaning passengers; I conducted a post-flight inspection to check if there was an explanation for the thump; and discovered a roughly south shaped deep and jagged split or gouge in the center tread of the right inboard tire approximately 2 inches long running at a slight angle to the cord. I pointed this out to the other pilot; and we concluded we must have rolled over an unseen piece of FOD. I returned to the flight deck and radioed ground control to report the suspected FOD; they dispatched airport operations to look for the object; and a few minutes later a member of airport operations arrived and showed me an object found in the vicinity of where we experienced the thump. It was a hard plastic flanged cylinder with a metal bolt; the end of which was a roller. An inspection mark showed that it was clearly an airplane part. The operations manager said he had found these frequently around the airport; and went off to an airlines maintenance to ask if they knew what it was. They identified it as a thrust-reverser stop from a 737; but there was no way to identify which aircraft it came from. They said that there were roughly 24 of these on each airplane glued to the inside of the cowlings; and they were routinely found missing during inspections. The operations manager took a brief report; and apologized for the problem. We wrote the airplane up.given that the object was fairly small and random; I don't know of anything we could suggest other than boeing changing how these parts are attached to their airplanes.

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Original NASA ASRS Text

Title: Corporate jet Captain reported that during the landing rollout they felt a firm thump. A deep gouge was found in one of the tires. Airport Operations found a piece of FOD on the runway which appeared to be a thrust reverser stop from a B737.

Narrative: During landing roll out on Runway XX; as we approached Taxiway A; decelerating toward 60 kts we felt a firm thump; as if the aircraft rolled over something or struck something. This was also noticed by our flight attendant who was seated in the cabin. Nothing obvious was apparent from the aircraft's condition; so we taxied to the ramp. After deplaning passengers; I conducted a post-flight inspection to check if there was an explanation for the thump; and discovered a roughly S shaped deep and jagged split or gouge in the center tread of the right inboard tire approximately 2 inches long running at a slight angle to the cord. I pointed this out to the other pilot; and we concluded we must have rolled over an unseen piece of FOD. I returned to the flight deck and radioed Ground control to report the suspected FOD; they dispatched airport operations to look for the object; and a few minutes later a member of airport operations arrived and showed me an object found in the vicinity of where we experienced the thump. It was a hard plastic flanged cylinder with a metal bolt; the end of which was a roller. An inspection mark showed that it was clearly an airplane part. The Operations manager said he had found these frequently around the airport; and went off to an airlines maintenance to ask if they knew what it was. They identified it as a thrust-reverser stop from a 737; but there was no way to identify which aircraft it came from. They said that there were roughly 24 of these on each airplane glued to the inside of the cowlings; and they were routinely found missing during inspections. The Operations manager took a brief report; and apologized for the problem. We wrote the airplane up.Given that the object was fairly small and random; I don't know of anything we could suggest other than Boeing changing how these parts are attached to their airplanes.

Data retrieved from NASA's ASRS site 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.