Narrative:

Departing; late push; late night. At rotation we felt a mild bump/ thump as we broke ground; not unlike a bump or rough spot in the runway. However; after lift off there seemed to be a very subtle difference to the general cockpit noise. My initial concern was a tire issue; but I've had those before and its anything but subtle; so we raised the gear and continued. I asked the first officer if he thought something sounded 'off' and he shrugged his shoulders and said 'maybe the AC panel'. We quickly dismissed this possibility because it wasn't loud enough. Meanwhile all engine indicators were normal and unchanged. There were no cas message. And as we accelerated; things seemed to normalize sound wise; and the plane was flying normal. As we passed through 10000 ft.; we were about to call the flight attendant; but she called us first to ask us if the main cabin door was showing closed. It was and we told her that; and she said she was hearing a noise coming from the door. That was a relief to us because it explained the noise anomaly; and left me to think it was a door seal or some other minor door maintenance issue. With no other indication to warrant concern for safety; we pressed on to our planned destination. We landed normally and taxied to park. While the first officer was conducting the post flight; he found some damage. To our great surprise; the left main inboard tire had shed its tread. The tire was intact and holding what appeared to be normal air pressure. There were dents and damage in the trailing edge of the inboard flap at the wing root. There were black rubber swirl marks on the left engine inlet cone; and several bent compressor blades. We were shocked; and impressed; that this engine ingested what appeared to be a great deal of rubber; and showed no signs of distress on the instruments in the cockpit. I felt bad that this hard broke airplane was at an out station instead of a maintenance base; but the airplane gave us no reason to take it back.

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Original NASA ASRS Text

Title: A CRJ200's left inboard tire tread separated during takeoff damaging the inboard trailing edge flap and the left engine. All indications were normal and the damage was discovered during a walk around for the next flight.

Narrative: Departing; late push; late night. At rotation we felt a mild bump/ thump as we broke ground; not unlike a bump or rough spot in the runway. However; after lift off there seemed to be a very subtle difference to the general cockpit noise. My initial concern was a tire issue; but I've had those before and its anything but subtle; so we raised the gear and continued. I asked the First Officer if he thought something sounded 'off' and he shrugged his shoulders and said 'maybe the AC panel'. We quickly dismissed this possibility because it wasn't loud enough. Meanwhile all engine indicators were normal and unchanged. There were no CAS message. And as we accelerated; things seemed to normalize sound wise; and the plane was flying normal. As we passed through 10000 ft.; we were about to call the Flight Attendant; but she called us first to ask us if the main cabin door was showing closed. It was and we told her that; and she said she was hearing a noise coming from the door. That was a relief to us because it explained the noise anomaly; and left me to think it was a door seal or some other minor door maintenance issue. With no other indication to warrant concern for safety; we pressed on to our planned destination. We landed normally and taxied to park. While the First Officer was conducting the post flight; he found some damage. To our great surprise; the left main inboard tire had shed its tread. The tire was intact and holding what appeared to be normal air pressure. There were dents and damage in the trailing edge of the inboard flap at the wing root. There were black rubber swirl marks on the left engine inlet cone; and several bent compressor blades. We were shocked; and impressed; that this engine ingested what appeared to be a great deal of rubber; and showed no signs of distress on the instruments in the cockpit. I felt bad that this hard broke airplane was at an out station instead of a maintenance base; but the airplane gave us no reason to take it back.

Data retrieved from NASA's ASRS site as of April 2012 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.