Narrative:

Ground crew brought to my attention something on top of the wing. I went to look at it and it looked like black nylon cord; maybe six inches long; on the top back right wing root; stuck on the side fuselage fairing. I couldn't reach it but determined it was ok to continue. Flight to and landing at [destination] was uneventful. Called maintenance to remove the debris and was told it was (in fact) a cable and the aircraft was grounded.I am new in the captain seat but have learned a valuable lesson. I will no longer assume I can determine if something is ok to continue. Maintenance personnel are the experts and I will defer to them on anything I'm not 100 percent sure of.

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Original NASA ASRS Text

Title: B737 flight crew reported that they were alerted by ground personnel that something was sticking out of the top of the inboard side of the right wing. Maintenance determined it was a cable and took the aircraft out of service.

Narrative: Ground Crew brought to my attention something on top of the wing. I went to look at it and it looked like black nylon cord; maybe six inches long; on the top back right wing root; stuck on the side fuselage fairing. I couldn't reach it but determined it was ok to continue. Flight to and landing at [destination] was uneventful. Called Maintenance to remove the debris and was told it was (in fact) a cable and the aircraft was grounded.I am new in the Captain seat but have learned a valuable lesson. I will no longer assume I can determine if something is ok to continue. Maintenance Personnel are the experts and I will defer to them on anything I'm not 100 percent sure of.

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.