Narrative:

We were getting marshaled by one [1] marshaller into an extremely tight spot between another aircraft and a hangar on the FBO ramp. We were at taxiing at a snail's pace on the ramp because of the large amount of snow and ice in addition to the small space into which we were being guided. We followed the guide signals to turn left into the space then straight. Suddenly; the guide man signaled a pretty sharp left turn then straight again and never gave us a stop signal. We stopped when it appeared to me we were about to hit the pre-placed chocks. During the initial left turn and subsequent maneuvering; I was closely monitoring the right winglet's position relative to the hangar.it appeared to me the winglet was clear of the hangar. The lighting was at best poor for most of the hangar and nonexistent at the left edge of the hangar. The floodlights are aimed more toward the ramp than the edge of the hangar. Moreover; the edge of the hangar is not straight up and down -it protrudes from the face of the hangar more at some points than others because of preexisting damage. Because of poor lighting and irregular shape of the hangar; it is practically impossible to ascertain where the different edges of the hangar are.we opened the door after cleaning the aircraft; and we were told we had hit the hangar. We were shocked and stupefied by this supposition since we had neither heard; nor felt anything. We went outside to look at the airplane and hangar. It was at this time we saw the shape and jagged edges of the hangar structure described in the first paragraph. In regard to the plane; we saw what appeared to be a seam on the right side of the outside of the right winglet and a very similar seam on the inside of the right winglet. The inside and outside 'seams' appear to be of similar length; angle and distance from the top of the winglet. Additionally the left winglet has similar seams.if the winglet scraped anything; it seems like there would be a seam only on the outside of the winglet. It appeared to me there was sufficient clearance to preclude any touching or scraping. If there was contact it was certainly unintended since the captain and I did all we could to avoid hitting anything. A minimum of two wing walkers and a guide man should always be used to park a plane. Also better and complete illumination of the ramp and any structures; which are close to any aircraft; should be mandated. There must be a way to communicate directly with the guide man. Finally parking on small spaces should be prohibited at night.

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Original NASA ASRS Text

Title: Challenger 300 First Officer reported that Ground Personnel told them that the winglet made contact with the hangar while taxiing into the FBO ramp.

Narrative: We were getting marshaled by ONE [1] marshaller into an extremely tight spot between another aircraft and a hangar on the FBO ramp. We were at taxiing at a snail's pace on the ramp because of the large amount of snow and ice in addition to the small space into which we were being guided. We followed the guide signals to turn left into the space then straight. Suddenly; the guide man signaled a pretty sharp left turn then straight again and never gave us a stop signal. We stopped when it appeared to me we were about to hit the pre-placed chocks. During the initial left turn and subsequent maneuvering; I was closely monitoring the right winglet's position relative to the hangar.It appeared to me the winglet was clear of the hangar. The lighting was at best poor for most of the hangar and nonexistent at the left edge of the hangar. The floodlights are aimed more toward the ramp than the edge of the hangar. Moreover; the edge of the hangar is not straight up and down -it protrudes from the face of the hangar more at some points than others because of preexisting damage. Because of poor lighting and irregular shape of the hangar; it is practically impossible to ascertain where the different edges of the hangar are.We opened the door after cleaning the aircraft; and we were told we had hit the hangar. We were shocked and stupefied by this supposition since we had neither heard; nor felt anything. We went outside to look at the airplane and hangar. It was at this time we saw the shape and jagged edges of the hangar structure described in the first paragraph. In regard to the plane; we saw what appeared to be a seam on the right side of the outside of the right winglet and a very similar seam on the inside of the right winglet. The inside and outside 'seams' appear to be of similar length; angle and distance from the top of the winglet. Additionally the left winglet has similar seams.If the winglet scraped anything; it seems like there would be a seam only on the outside of the winglet. It appeared to me there was sufficient clearance to preclude any touching or scraping. If there was contact it was certainly unintended since the Captain and I did all we could to avoid hitting anything. A minimum of two wing walkers and a guide man should always be used to park a plane. Also better and complete illumination of the ramp and any structures; which are close to any aircraft; should be mandated. There must be a way to communicate directly with the guide man. Finally parking on small spaces should be prohibited at night.

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.