CE650 first officer reports a track deviation during the ruudy 4 departure from teb. The FMC did not...

Narrative:

I was acting as sic and pilot not flying on this flight from teb. Our assigned route was teb ruudy four lanna J48... After entering the flight plan into our FMS I expressed concern that we were unable to view the ruudy four departure procedure waypoints in the FMS even though we had selected the ruudy four departure procedure when the unit prompted us. For a backup and great situational awareness in case the FMS malfunctions during the initial climb; I manually entered the ruudy four waypoints into an aviation program foreflight on an ipad. With an external GPS; I am able to view the aircraft's position in real time on a map. After departure; the captain began to execute the ruudy four departure procedure. Upon reaching tasca and climbing through about 3;000 MSL; I noticed on the FMS the current waypoints in progress was runway 24-lanna. This was not correct; the FMS had dropped the departure procedure and had the flight director tracking a course from the runway to lanna which was further southwest on our route. Meanwhile; I am watching our aircraft's position parallel and drift further south and southeast of our required course on my ipad. I encouraged the captain to fly heading 280 for a longer period of time to prevent drifting and reach ruudy before turning southwest to lanna; but he was confused and continued to fly about a 240 degree heading towards lanna. During this time; new york center asks to state our heading and if we were flying the ruudy four. ATC then issues us a heading of 280 to fly and begins questioning what procedure we were flying and when I have time; to study the ruudy four. I responded appropriately to fly heading 280 and confirmed we were flying the ruudy four. To prevent this from occurring again; I will ensure the FMS is functioning properly and will be more firm and urgent with the PIC regarding the aircraft's position and route of flight.

Original NASA ASRS Text

Title: CE650 First Officer reports a track deviation during the RUUDY 4 departure from TEB. The FMC did not appear correct prior to departure and was steering the aircraft to LANNA after TASCA. ATC commented and corrected the course.

Narrative: I was acting as SIC and pilot not flying on this flight from TEB. Our assigned route was TEB RUUDY FOUR LANNA J48... After entering the flight plan into our FMS I expressed concern that we were unable to view the RUUDY FOUR departure procedure waypoints in the FMS even though we had selected the RUUDY FOUR departure procedure when the unit prompted us. For a backup and great situational awareness in case the FMS malfunctions during the initial climb; I manually entered the RUUDY FOUR waypoints into an aviation program Foreflight on an iPad. With an external GPS; I am able to view the aircraft's position in real time on a map. After departure; the Captain began to execute the RUUDY FOUR departure procedure. Upon reaching TASCA and climbing through about 3;000 MSL; I noticed on the FMS the current waypoints in progress was Runway 24-LANNA. This was not correct; the FMS had dropped the departure procedure and had the flight director tracking a course from the runway to LANNA which was further southwest on our route. Meanwhile; I am watching our aircraft's position parallel and drift further south and southeast of our required course on my iPAD. I encouraged the Captain to fly heading 280 for a longer period of time to prevent drifting and reach RUUDY before turning southwest to LANNA; but he was confused and continued to fly about a 240 degree heading towards LANNA. During this time; New York Center asks to state our heading and if we were flying the RUUDY FOUR. ATC then issues us a heading of 280 to fly and begins questioning what procedure we were flying and when I have time; to study the RUUDY FOUR. I responded appropriately to fly heading 280 and confirmed we were flying the RUUDY FOUR. To prevent this from occurring again; I will ensure the FMS is functioning properly and will be more firm and urgent with the PIC regarding the aircraft's position and route of flight.

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.

Attributes
ACN	991216
Time
Date	201201
Local Time Of Day	1201-1800
Place
Locale Reference	ZNY.ARTCC
State Reference	NY
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	Citation III VI VII (C650)
Operating Under FAR Part	Part 91
Flight Phase	Initial Climb
Route In Use	SID RUUDY FOUR
Flight Plan	IFR
Component
Aircraft Component	FMS/FMC
Person 1
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP) Flight Crew Flight Instructor Flight Crew Instrument
Experience	Flight Crew Last 90 Days 50 Flight Crew Total 4300 Flight Crew Type 260
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy Deviation - Track / Heading All Types

CE650 first officer reports a track deviation during the ruudy 4 departure from teb. The FMC did not appear correct prior to departure and was steering the aircraft to lanna after tasca. ATC commented and corrected the course.