Narrative:

Performed preflight with no abnormals remaining. After a normal start and taxi out, during takeoff roll we overheard a radio transmission stating that it appeared a part may have come off an aircraft of our type. There were no abnormal indications. After takeoff we eventually found out through our company by radio that an engine cowling had come off our aircraft. We returned to our airport for an uneventful landing. There were no abnormal indications throughout the flight. Post-flight revealed damage caused by cowling departing engine. There were no obvious reasons for this occurrence.

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Original NASA ASRS Text

Title: WDB ENG COWLING FELL OFF ACFT DURING TKOF.

Narrative: PERFORMED PREFLT WITH NO ABNORMALS REMAINING. AFTER A NORMAL START AND TAXI OUT, DURING TKOF ROLL WE OVERHEARD A RADIO XMISSION STATING THAT IT APPEARED A PART MAY HAVE COME OFF AN ACFT OF OUR TYPE. THERE WERE NO ABNORMAL INDICATIONS. AFTER TKOF WE EVENTUALLY FOUND OUT THROUGH OUR COMPANY BY RADIO THAT AN ENG COWLING HAD COME OFF OUR ACFT. WE RETURNED TO OUR ARPT FOR AN UNEVENTFUL LNDG. THERE WERE NO ABNORMAL INDICATIONS THROUGHOUT THE FLT. POST-FLT REVEALED DAMAGE CAUSED BY COWLING DEPARTING ENG. THERE WERE NO OBVIOUS REASONS FOR THIS OCCURRENCE.

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.