Flight Crew Air Transport Pilot (ATP)
Situational Awareness; Time Pressure; Human-Machine Interface
Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy
Air Traffic Control Issued Advisory / Alert; Flight Crew Became Reoriented; Flight Crew Returned To Clearance
Chart Or Publication; Human Factors; Procedure
Departing TEB Runway 24 on the RUUDY 4 departure; the pilot flying began a left turn at approximately 400 FT AGL; following the command bars. The pilot not flying questioned the reason for the turn and the pilot flying began a turn back to the desired course. The heading change was about 20 degrees to the left before it was reversed. ATC questioned the reason for the left turn; and the pilot not flying replied that it was a mistake. The flight continued to it's destination without further difficulty. Upon arrival at the destination line service advised that ATC wanted a phone call to discuss our TEB departure. The PIC made the call and was advised of a possible pilot deviation. PIC notified the Assistant Chief Pilot of the event. FMS vertical and lateral modes were verified as per checklist requirements prior to departure; with LNAV selected. Pilots must have a mental picture of the departure profile to prevent course deviations in the event of erroneous flight guidance information.
FMS vertical and lateral modes were checked as per checklist prior to departure; with LNAV selected departing TEB Runway 24 on the RUUDY 4 departure. After takeoff; climbing through 400 FT; the command bars indicated a left turn. The command bars were initially followed. Pilot not flying questioned the turn and the pilot flying quickly returned to the desired course. The heading change was about 20 degrees to the left before it was reversed. ATC questioned the reason for the turn; and the pilot not flying replied that it was a mistake. The flight continued to its destination without further difficulty. Upon arrival at our destination; line service advised that ATC wanted a phone call to discuss the event. PIC called ATC and notified the Assistant Chief Pilot of the event.
A First Officer mistakenly followed a flight director left turn command after a TEB Runway 24 RUUDY 4 takeoff; but the Captain alerted him so that he turned to the correct heading as ATC took note of the error.