(c)
11R36, PROX SW TEST
(d)
11S23, POS SYS 2
S 862-044
(6)
Supply electrical power (AMM 24-22-00/201).
S 012-045
(7)
Open the access door for the main equipment center, 119BL
(AMM 06-41-00/201) and find the PSEU on the E3-4 rack.
F.
Do the Test of the Proximity Sensor for the Main Landing Gear (Fig. 204)
S 742-041
(1) Test of the Landing Gear Down and Locked Sensors (S10057, S10061,
_________________________________________________________________ S10070, S10074):
_______________
(a) Use the PSEU to do a target position test to make sure the sensor operates correctly.
NOTE: The PRESS/TEST switch, SENSOR CHANNEL SELECT thumb
____ switches, TARGET NEAR and TARGET FAR lights, and the 3-digit LED display are found on the BITE panel of the PSEU.
1) Push the PRESS/TEST switch. Make sure the number 888 and all five indicator lights on the PSEU are on until the switch is released.
Sensor Description PSEU Code No. Down and Locked, left gear, sys 1 061 Down and Locked, left gear, sys 2 074 Down and Locked, right gear, sys 1 057 Down and Locked, right gear, sys 2 070
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PROXIMITY SWITCH
E3 RACK ELECTRONICS
UNIT, M162
SEE A
SEE B
MAIN EQUIPMENT CANTER
ACCESS DOOR, 119BL (REF)
E3-4 SHELF FWD
MAIN EQUIPMENT CENTER (REF) ACCESS DOOR, 119BL (REF)
MAIN EQUIPMENT CENTER
A
TARGET NEAR OR
PROXIMITY SWITCH
FAR INDICATOR
ELECTRONICS UNIT
LIGHTS
(M162) THUMBWHEEL SENSORBITE PANEL
CHANNEL SEE C
SELECTOR SWITCHES (3)
LRU NUMBER 3-DIGIT DISPLAY
LRU INDICATOR LIGHTS
TARGET TEST
SWITCH
FWD BITE PANEL BC
Proximity Switch Electronics Unit Sensor Test
Figure 204
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2) Do the test of the sensor with the actuator test tool.
___________________________
NOTE: You can only do this test if the sensor is not
____ installed in its bracket or if the gear is not fully extended or retracted. This test is used during the installation of the sensor.
a) Make sure the sensor is more than one inch away from
all metal surfaces. b) Push the TARGET TEST switch and hold for one second. c) Make sure the sensor number is shown on the LED
display, and, after four seconds, the TARGET FAR light comes on. d) Hold or install the actuator test tool on the face of the sensor.
NOTE: You can use tape to attach the actuator to the
____
sensor.
e) Push the TARGET TEST switch and hold for one second.
f) Make sure the sensor number is shown on the LED display, and, after four seconds, the TARGET NEAR light comes on.
g) Remove the actuator from the sensor. 3) Do the test of the sensor with the deactuator tool.
________________________
NOTE: This test is not necessary after a sensor
____ installation. You can use this test to find if a sensor will change from target near to target far with the sensor installed in its bracket.
a) Push the TARGET TEST switch and hold for one second.
b) Make sure the sensor number is shown on the LED display, and, after four seconds, the TARGET NEAR light comes on.
c) Install a deactuator on the sensor.
d) Push the TARGET TEST switch for one second.
e) Make sure the sensor number is again shown and, after
four seconds, the TARGET FAR light comes on. f) Remove the deactuator from the sensor.
S 742-042
(2) Test of the Up and Locked Sensors (S10069, S10073, S10239, S10240)
__________________________________________________________________ and the Door Closed Sensors (S10072, S10076, S10240, S10241):
____________________________________________________________
(a) Use the PSEU to do a target position test to make sure the sensor operates correctly. 1) Push the PRESS/TEST switch. Make sure the number 888 and
all five indicator lights on the PSEU are on until the switch is released.
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2)
3)
4)
Use the SENSOR CHANNEL SELECT dials to put in the sensor number for a test.
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