Hi there,
On the 737 NG , the slip indicator (lower portion of the bank pointer)shows the lateral acceleration of the aircraft.
The linear accelerations are calculated by the Inertial reference Processor which gets its movement data from the IRS Gyros and accelerometers.
THis info is then sent to some data receiver which forwards to the DEUs (to convert the info into a video signal) which is sent to to the pilot Display unit in the form of a bank slip/skid indicator.
If the ADIRU senses a roll ATTitude of more than 35 degrees its color will change to amber.
When the aircraft goes through turbulence which may cause some lateral acceleration,the stall management yaw damper will soften the disruption by moving the rudder up to 2 degrees with flaps up.
The pilot only use of this feature in practical terms is when faced with an engine failure and in manual flight as he will see if his rudder input is insufficient or excessive for the bank he is using...
hope that helps..
Last edited by de facto; 11th April 2012 at 10:11.