A global 700 autopilot disconnected on the teb runway 24 ruudy 4 departure at 1;300 ft due to turbul...

Attributes
ACN	1073930
Time
Date	201303
Local Time Of Day	0601-1200
Place
Locale Reference	TEB.Airport
State Reference	NJ
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Global Express (BD700)
Operating Under FAR Part	Part 91
Flight Phase	Initial Climb
Route In Use	SID RUUDY 4
Flight Plan	IFR
Component
Aircraft Component	Altitude Hold/Capture
Person 1
Function	Pilot Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 25 Flight Crew Total 8000 Flight Crew Type 1000
Events
Anomaly	Deviation - Altitude Crossing Restriction Not Met Deviation - Altitude Overshoot Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy Inflight Event / Encounter Weather / Turbulence

Narrative:

Takeoff teterboro runway 24; winds variable 320-360 degrees; 12 KTS gusting to 30 KTS. Altitude select set to 1;500 ft. LNAV departure; vs as vertical mode. Departure - fly 240 degrees to wentz intersection. Cross wentz at 1;500 ft - right turn to 280 degrees to ruudy and maintain 2;000 ft. Windy conditions on departure and liftoff. At 1;300 ft and leveling; the autopilot disengaged due to moderate turbulence and strong winds. Immediately took control of the global and flew manually. Due to turbulence I was unable to level at 1;500 ft. Global climbed to 1;800 ft - 1;900 ft when I finally was able to start descent to 1;500 ft approaching wentz. Crossing wentz I turned 280 degrees; turned back on the autopilot; called for 2;000 ft in the altitude select and climbed to approaching ruudy. At no time was the aircraft out of control of in conflict with other aircraft.

Original NASA ASRS Text

Title: A Global 700 autopilot disconnected on the TEB Runway 24 RUUDY 4 Departure at 1;300 FT due to turbulence and the pilot descended from 1;800 FT to cross WENTZ at 1;500 FT.

Narrative: Takeoff Teterboro Runway 24; winds variable 320-360 degrees; 12 KTS gusting to 30 KTS. Altitude Select set to 1;500 FT. LNAV Departure; VS as vertical mode. Departure - fly 240 degrees to WENTZ Intersection. Cross WENTZ at 1;500 FT - right turn to 280 degrees to RUUDY and maintain 2;000 FT. Windy conditions on departure and liftoff. At 1;300 FT and leveling; the autopilot disengaged due to moderate turbulence and strong winds. Immediately took control of the Global and flew manually. Due to turbulence I was unable to level at 1;500 FT. Global climbed to 1;800 FT - 1;900 FT when I finally was able to start descent to 1;500 FT approaching WENTZ. Crossing WENTZ I turned 280 degrees; turned back on the autopilot; called for 2;000 FT in the Altitude Select and climbed to approaching RUUDY. At no time was the aircraft out of control of in conflict with other aircraft.

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.

A global 700 autopilot disconnected on the teb runway 24 ruudy 4 departure at 1;300 ft due to turbulence and the pilot descended from 1;800 ft to cross wentz at 1;500 ft.