Narrative:

Just prior to taxi, the FBO towed out an aircraft Y and parked it at the end of the row we were parked in. The aircraft was positioned at an angle and in an opposite direction to the other aircraft in the same row. It was also positioned 10-15' back into the taxiway. The other side of the taxiway also had 4 aircraft parked. There were no centerlines on the taxiway but rather a line off centered to the left that would have put a corporate medium large transport Y wig into the parking area on the left side. We taxied out very slowly knowing there was no excessive room. I moved the aircraft to the left of the taxiway to proceed around the parked medium large transport Y saving approximately 10' of clearance on the left side. As we approached the medium large transport Y we were barely moving. As I was working the left side the senior captain in the right seat said we were clear but to move over another 2-3'. I assumed that was to clear the wingtip since the aircraft was parked at an angle. Shortly after making a slight left adjustment in the nose wheel steering. We felt the aircraft stop. The right wingtip had penetrated the last 8 inches of the tail cone on the other medium large transport Y obviously if wing walkers would have been present this may not have happened. Also if the FBO had not parked an aircraft so as to make the taxi conditions difficult this incident would not have happened. If we could have someone from the cabin of the aircraft watching it might have helped. The beset would be to have the medium large transport X towed out to a safe starting area. However sfo does not have sufficient space to do this.

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Original NASA ASRS Text

Title: CORPORATE ACFT HAS MINOR COLLISION WITH ANOTHER CORPORATE ACFT WHILE MANEUVERING IN RESTRICTED AND CONGESTED RAMP AREA.

Narrative: JUST PRIOR TO TAXI, THE FBO TOWED OUT AN ACFT Y AND PARKED IT AT THE END OF THE ROW WE WERE PARKED IN. THE ACFT WAS POSITIONED AT AN ANGLE AND IN AN OPPOSITE DIRECTION TO THE OTHER ACFT IN THE SAME ROW. IT WAS ALSO POSITIONED 10-15' BACK INTO THE TXWY. THE OTHER SIDE OF THE TXWY ALSO HAD 4 ACFT PARKED. THERE WERE NO CENTERLINES ON THE TXWY BUT RATHER A LINE OFF CENTERED TO THE LEFT THAT WOULD HAVE PUT A CORPORATE MLG Y WIG INTO THE PARKING AREA ON THE LEFT SIDE. WE TAXIED OUT VERY SLOWLY KNOWING THERE WAS NO EXCESSIVE ROOM. I MOVED THE ACFT TO THE LEFT OF THE TXWY TO PROCEED AROUND THE PARKED MLG Y SAVING APPROX 10' OF CLRNC ON THE LEFT SIDE. AS WE APCHED THE MLG Y WE WERE BARELY MOVING. AS I WAS WORKING THE LEFT SIDE THE SENIOR CAPT IN THE RIGHT SEAT SAID WE WERE CLEAR BUT TO MOVE OVER ANOTHER 2-3'. I ASSUMED THAT WAS TO CLEAR THE WINGTIP SINCE THE ACFT WAS PARKED AT AN ANGLE. SHORTLY AFTER MAKING A SLIGHT LEFT ADJUSTMENT IN THE NOSE WHEEL STEERING. WE FELT THE ACFT STOP. THE RIGHT WINGTIP HAD PENETRATED THE LAST 8 INCHES OF THE TAIL CONE ON THE OTHER MLG Y OBVIOUSLY IF WING WALKERS WOULD HAVE BEEN PRESENT THIS MAY NOT HAVE HAPPENED. ALSO IF THE FBO HAD NOT PARKED AN ACFT SO AS TO MAKE THE TAXI CONDITIONS DIFFICULT THIS INCIDENT WOULD NOT HAVE HAPPENED. IF WE COULD HAVE SOMEONE FROM THE CABIN OF THE ACFT WATCHING IT MIGHT HAVE HELPED. THE BESET WOULD BE TO HAVE THE MLG X TOWED OUT TO A SAFE STARTING AREA. HOWEVER SFO DOES NOT HAVE SUFFICIENT SPACE TO DO THIS.

Data retrieved from NASA's ASRS site as of August 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.