TM 55-4920-401-13&P
Figure 2-9.
Switch Box
Figure 2-10. Engine Trim Check Setup Using Trimmer in Tester
b. Connect BH450 check cable to CHECK CABLE
temperature connector). Read out temperature on tester
receptacle on tester and to aircraft thermocouple circuit
TEMP indicator.
using either (1) or (2) below.
(2) When switch box is used: Break aircraft
(1) When switch box is not used: Break aircraft
thermocouple circuit at indicator if aircraft has a single
thermocouple circuit at engine temperature junction
D’Arsonval indicator or at engine if aircraft has dual
connector. Connect check cable to engine junction connec-
D’Arsonval indicators. Connect aircraft thermocouple
tor (if required, use check cable adapter to match engine
leads to AIRCRAFT T.C. LEADS terminals on BH123-3
2-10
Change 6
