, •and when lighted comes from the INS source (secondary). The operation of the switches were ground and flight tested and +dung to operate normali:Midcoatt Aviation, Inc. D.E.S. apprOved wiring diagrams, 1159-20007.151 "Instrument Panel & Annunciator Mod", 1159,-3260o-151 "CompasS Transfer Mod" and 1159-35000-151 "Altitude