Southeast Aerospace exchanges are based on the return of an undamaged, economically repairable core unit with identical part number as the unit shipped to the customer.
The KI-209A does not have an OBS resolver inside the indicator to provide selected course information to the GPS. To see the Sine/Cosine potentiometer and properly calibrate to it, it requires more than the /- 10 degrees of adjustment that a KLN-90B has.
The KLN-89B and KLN-900 has /- 180 degrees of adjustment. The KLN-94 does directly replace the KLN-89B IFR GPS.
Terminal area) APR - light that signals pilot when the GPS is engaged in Approach mode MSG - light that signals pilot that the GPS has generated a Message alert that should be viewed on the GPS WPT - light that signals pilot that the GPS has generated a Waypoint alert that should be viewed on the GPS INTG - light that will signal pilot when the GPS receiver detects a position error or is unable to calculate the Integrity of the position Some annunciator units and annunciator control units or ACUs have a variety a these switches and annunciators depending on the GPS system to be interfaced with or the aircraft installation.
However, there are certain annunciations such as MSG and WPT that are standard for all annunciators required.
Variations in power input and bezel orientation are available as well.