A HS125 flight crew had a track deviation on the teb ruudy two departure when the aircraft failed to...

Attributes
ACN	963315
Time
Date	201108
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	BAe 125 Series 800
Operating Under FAR Part	Part 91
Flight Phase	Initial Climb
Route In Use	SID RUUDY 2
Flight Plan	IFR
Component
Aircraft Component	FMS/FMC
Person 1
Function	Captain Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Person 2
Function	Pilot Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy Deviation - Track / Heading All Types

Narrative:

We were assigned the ruudy 2 out of teb off of runway 24. During the initial climb out prior to the turn to 260 degrees; I noticed we were offset about 1 mile from the depicted flight path on the mfd. I stated to the flying pilot that we were not on course; which he agreed. I then stated that he should turn to the right so as to get on course. At that time; new york departure gave us a turn to the heading of 260 degrees which corresponded to the departure procedure. We made the requested turn and continued the climb. At that time I realized that the FMS was in inhibit mode and was not automatically cycling through waypoints. When departing on an RNAV departure which is dependent on the accuracy of the FMS; it would be a good idea to check that the FMS is not in inhibit mode.

Original NASA ASRS Text

Title: A HS125 flight crew had a track deviation on the TEB RUUDY TWO Departure when the aircraft failed to turn to 260 degrees because the FMS was in the Inhibit Mode and therefore did not automatically sequence to departure waypoints.

Narrative: We were assigned the RUUDY 2 out of TEB off of Runway 24. During the initial climb out prior to the turn to 260 degrees; I noticed we were offset about 1 mile from the depicted flight path on the MFD. I stated to the flying pilot that we were not on course; which he agreed. I then stated that he should turn to the right so as to get on course. At that time; New York Departure gave us a turn to the heading of 260 degrees which corresponded to the departure procedure. We made the requested turn and continued the climb. At that time I realized that the FMS was in inhibit mode and was not automatically cycling through waypoints. When departing on an RNAV departure which is dependent on the accuracy of the FMS; it would be a good idea to check that the FMS is not in inhibit mode.

Data retrieved from NASA's ASRS site as of April 2012 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 HS125 flight crew had a track deviation on the teb ruudy two departure when the aircraft failed to turn to 260 degrees because the FMS was in the inhibit mode and therefore did not automatically sequence to departure waypoints.