Flight Crew Instrument; Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 55; Flight Crew Total 17119; Flight Crew Type 1350
Confusion; Situational Awareness
Conflict Ground Conflict; Critical; Ground Event / Encounter Aircraft
General Flight Cancelled / Delayed
Human Factors
While positioned on the ramp at FBO in ZZZ the aircraft I was operating came in contact with a parked aircraft.At brake release and at idle power I asked the pilot in the right seat if we had clearance from the winglet of the aircraft on our left which was on a tug. The pilot not flying told me that we had clearance and I released the brakes and rolled forward. The pilot not flying then told me to stop and I immediately applied brake pressure. My aircraft didn't move with the exception of the forward lurch from the brakes. I set the parking brake and then shut down both engines.I exited the aircraft and walked around to the right wing and observed the winglets of both aircraft in apparent contact with each other. Sometime later after the tugged aircraft was pushed back we observed no damage to my aircraft and that was further supported by four independent maintenance technicians and inspectors. There was however damage present to the Challenger that was still on the tug.
The crew; including dispatch; notified the FBO of our departure time; and request to be online; in the several days leading up to our departure.Upon arrival; we requested the aircraft be fueled. Upon passenger arrival; the marshaller and wing walker escorted the passengers to our plane; they then subsequently left without informing the crew. We then proceeded to start engines normally; and contacted ground for our taxi clearance.Upon block out; the PIC asked if our right wingtip was clear of obstacles. As I looked up I determined there was not enough room for wing tip clearance; and called for an immediate left turn. The PIC then applied brakes; but it was too late and we made contact with a Challenger; wingtip to wingtip. Maintenance personnel inspected our plane and determined there was no damage; and a logbook entry was made.
Gulfstream V flight crew reported impacting another aircraft's wingtip at the start of taxi.