A first officer mistakenly followed a flight director left turn command after a teb runway 24 ruudy ...

Attributes
ACN	1073658
Time
Date	201303
Local Time Of Day	1801-2400
Place
Locale Reference	TEB.Airport
State Reference	NJ
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Medium Transport Low Wing 2 Turbojet Eng
Operating Under FAR Part	Part 91
Flight Phase	Climb
Route In Use	SID RUUDY 4
Flight Plan	IFR
Person 1
Function	Pilot Not Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Person 2
Function	Pilot Flying First Officer
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy Deviation - Track / Heading All Types

Narrative:

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.

Original NASA ASRS Text

Title: 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.

Narrative: 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.

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 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.