Gulfstream V / G500 / G550
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Last 90 Days 60; Flight Crew Total 11500; Flight Crew Type 4000
Human-Machine Interface
Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter Weather / Turbulence
Air Traffic Control Issued New Clearance; Flight Crew Returned To Clearance
Human Factors; Weather
Took off into icing conditions and turbulence from Runway 1 at TEB. I made the initial turn manually to 040; called flaps up; and then called for the 'autopilot on.' The Teterboro 8 SID was programed and LNAV engaged. As we approached 1;800 FT MSL ATC cleared us to 10;000 FT. My copilot dialed in the altitude and bumped the autopilot off in the turbulence. I grabbed the yoke and he reengaged the autopilot and selected heading. I called for flight level change and LNAV. This all occurred in a very small amount of time. Even though we acted quickly; we had passed the 2.3 NM turn on the SID. I selected heading and started the turn. 15 degrees into the turn ATC issued a heading of 270. We missed the turn by 2 NM. There were no conflicts or further action required or requested.
G-V Captain reports a late turn on the TEB 8 departure from Runway 1 when the First Officer inadvertently bumps the autopilot off while setting a new MCP altitude; due to turbulence.