A falcon 900 autopilot failed to capture 1;500 ft on the teb ruudy 4 SID so the captain disconnected...

Attributes
ACN	1044333
Time
Date	201210
Local Time Of Day	1201-1800
Place
Locale Reference	TEB.Airport
State Reference	NJ
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Falcon 900
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	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Flight Instructor
Experience	Flight Crew Last 90 Days 75 Flight Crew Total 4500 Flight Crew Type 350
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Altitude Crossing Restriction Not Met Deviation - Altitude Overshoot Deviation - Procedural Published Material / Policy Deviation - Procedural Clearance

Narrative:

Teb departure from runway 24; on climb out the aircraft was automated to climb the ruudy 4 departure on autopilot. This includes both lateral and vertical modes. After cleaning up the aircraft; the autopilot was engaged at approximately 800-1;000 ft MSL. When I noticed that the aircraft was not capturing the programmed altitude; 1;500 ft at wentz; I took over manual control and brought the aircraft back to 1;500 MSL. The altitude was approximately 1;740 ft MSL at wentz; and was back at 1;500 within 15-20 seconds. ATC cleared us to climb immediately to 6;000 ft; so the rest of the departure procedure was not flown. Going forward; very close monitoring of the automation is critical to accomplish the procedure; and correct for any autopilot issues. Also; engaging the autopilot as soon as possible after 400 ft will give the automation the best chance for success on a quick level off.

Original NASA ASRS Text

Title: A Falcon 900 autopilot failed to capture 1;500 FT on the TEB RUUDY 4 SID so the Captain disconnected the autopilot and manually returned to the SID altitude constraint.

Narrative: TEB Departure from Runway 24; on climb out the aircraft was automated to climb the RUUDY 4 departure on autopilot. This includes both lateral and vertical modes. After cleaning up the aircraft; the autopilot was engaged at approximately 800-1;000 FT MSL. When I noticed that the aircraft was not capturing the programmed altitude; 1;500 FT at WENTZ; I took over manual control and brought the aircraft back to 1;500 MSL. The altitude was approximately 1;740 FT MSL at WENTZ; and was back at 1;500 within 15-20 seconds. ATC cleared us to climb immediately to 6;000 FT; so the rest of the departure procedure was not flown. Going forward; very close monitoring of the automation is critical to accomplish the procedure; and correct for any autopilot issues. Also; engaging the autopilot as soon as possible after 400 FT will give the automation the best chance for success on a quick level off.

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 falcon 900 autopilot failed to capture 1;500 ft on the teb ruudy 4 SID so the captain disconnected the autopilot and manually returned to the SID altitude constraint.