TM 55-1520-240-T
16-214 Change 24
16-5.7 LANDING GEAR SWITCH STATUS LIGHT DOES NOT COME ON (Continued)
16-5.7
DOES LAMP
ILLUMINATE DURING
PRESS-TO-TEST?
DISCONNECT PLUG
147P4 FROM
REMOTE BYPASS
SWITCH PANEL. IS
28 VDC PRESENT ON
PIN C?
REPAIR/REPLACE
FAULTY WIRING/
COMPONENT ON
REMOTE BYPASS
SWITCH PANEL.
PLACE LDG GEAR
BYPASS SWITCH TO
BYPASS. DOES
LIGHT COME ON?
GO TO TASK 16-5.6.
DISCONNECT PLUG
300P52 LOCATED AT
STA. 460L OVERHEAD.
IS CONTINUITY
PRESENT FROM 147K1
TERMINAL B1 TO
300P52 PIN 48?
IS GROUND
PRESENT ON RELAY
147K1 TERMINAL X1?
REPAIR FAULTY
CONDITION OF WIRE
W668-178-20.
REMOVE AND
REPLACE FAULTY
RELAY 147K1.
YES
REPAIR FAULTY
CONDITION OF WIRE
W697-161-20.
OPEN LEFT
ELECTRICAL
COMPARTMENT
DOOR. IS 28 VDC
PRESENT ON RELAY
147K1 TERMINAL B2?
IS CONTINUITY
PRESENT BETWEEN
RELAY 147K1
TERMINAL B1 AND
PLUG 147P4 PIN C?
CORRECT OPEN
CONDITION ON WIRE
W697-158-20.
YES
NO
NO
REPAIR/REPLACE
FAULTY WIRING
BETWEEN 147K1
TERM. X1 & 148K2
TERM. C2 (RH LANDIN
GEAR).
NO
YES
NO
NO
YES
YES
NO
YES
NO
YES
FAULT CORRECTED.
G
END OF TASK
