Narrative:

As I was taxiing into the gate at msy; I noticed a portable air stair vehicle parked in the vicinity of the left safe area. There are no painted safe area lines at this gate; only a yellow lead-in line to the stopping point. There was a wing walker adjacent to the stairs and he had his lighted wand up signaling the wing would clear the stairs. As I approached the marshaller; he began doing what appeared to be a sort-of dancing motion on the yellow line for about 5 seconds. This was a slight distraction as I approached the gate; and I am not sure how close to the stairs the wing was at that time; I think the dance move was early on in the marshalling process. My focus was staying on the line and following the marshaller's directions. At no time was there any attempt by ground personnel to stop the aircraft as it approached the stairs. I never felt any yaw or bump as the wing made contact with the stairs. First officer said he may have felt a slight bump. First officer went outside to perform the post flight walkaround approximately 7-8 minutes after the shutdown checklist. During this time; no one from the ramp came to the cockpit to inform the crew that we had hit the stairs. Outside; first officer noticed the stairs very close to the wing and asked the wing walker if we had hit it and he said yes. First officer asked him why he didn't signal the marshaller or the captain of imminent contact and he stated he was not trained to do that; only to stand and look up at the wing and hold his wand up. First officer returned to the cockpit to tell me of the events. I went down and had the same conversation with the wing walker. It is not inconceivable that had first officer not gone out to do the post flight walkaround; we would have never known of the incident. First officer and I both looked at the wingtip and only saw some paint damage to the winglet on the underside. A maintenance write up was placed in the fdml. The ramp personnel are contracted in msy; they are not [company] employees.

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Original NASA ASRS Text

Title: A319 flight crew reported their wingtip contacted the air stairs while under Marshaller guidance taxiing in to a gate in MSY.

Narrative: As I was taxiing into the gate at MSY; I noticed a portable air stair vehicle parked in the vicinity of the left safe area. There are no painted safe area lines at this gate; only a yellow lead-in line to the stopping point. There was a wing walker adjacent to the stairs and he had his lighted wand up signaling the wing would clear the stairs. As I approached the Marshaller; he began doing what appeared to be a sort-of dancing motion on the yellow line for about 5 seconds. This was a slight distraction as I approached the gate; and I am not sure how close to the stairs the wing was at that time; I think the dance move was early on in the marshalling process. My focus was staying on the line and following the Marshaller's directions. At no time was there any attempt by ground personnel to stop the aircraft as it approached the stairs. I never felt any yaw or bump as the wing made contact with the stairs. First Officer said he may have felt a slight bump. First Officer went outside to perform the post flight walkaround approximately 7-8 minutes after the Shutdown Checklist. During this time; no one from the ramp came to the cockpit to inform the crew that we had hit the stairs. Outside; First Officer noticed the stairs very close to the wing and asked the wing walker if we had hit it and he said yes. First Officer asked him why he didn't signal the Marshaller or the Captain of imminent contact and he stated he was not trained to do that; only to stand and look up at the wing and hold his wand up. First Officer returned to the cockpit to tell me of the events. I went down and had the same conversation with the wing walker. It is not inconceivable that had First Officer not gone out to do the Post Flight Walkaround; we would have never known of the incident. First Officer and I both looked at the wingtip and only saw some paint damage to the winglet on the underside. A maintenance write up was placed in the FDML. The ramp personnel are contracted in MSY; they are not [Company] employees.

Data retrieved from NASA's ASRS site as of July 2013 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.