Used to simulate N1 et N2 tachometer output during engine tachometer system test per MM 77-12-00, autothrottle system per MM 22-31-00, and stall warning system test per MM 27-32-00
Used to manually test the installed engine and APU fire detection system s (whittaker) by simulating fire, overheat, and ground fault conditions, tester acts like an additional detector element connected in parallel
Permits the operation of the yaw damper system within the rudder power control unit in order to facilitate the internal leakage check of the main rudder PCU per airplane maintenance manual procedure 27-21-00 and the stanby rudder PCU per airplane maintenance manual procedure 29-00-00
Is used to troubleshoot the 737NG BSI (Boeing Sky Interior) Led light assemblies per FIM procedures. Typically, the cabling allows 1 or more light assemblies to be bypassed in order to isolate the suspect light assembly
