32-61-10
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 024-009
(3)
Remove the downlock sensor:
(a)
Loosen the conduit nut.
(b)
Remove the sensor mounting bolts.
(c)
Do not remove the shim(s) from the mounting bracket.
(d)
Remove the sensor and carefully pull the electrical wires from the conduit.
NOTE: Do not pull the line fully out of the conduit.
____
(e) Remove the line from the wire ends and let the line stay in the conduit.
TASK 32-61-10-404-010
3. Install the Downlock Sensor for the Body Gear_____________________________________________
A. Consumable Materials
(1)
A00704 Sealant - Silicone, RTV 162
(2)
B00083 Solvent - Aliphatic Naphtha, TT-N-95, Type 2
(3)
C00582 Primer - SS-4004
B.
References
(1)
AMM 24-22-00/201, Manual Control
(2)
AMM 29-11-00/201, Main Hydraulic Supply System
(3)
AMM 32-00-30/201, Landing Gear Door Locks
(4)
AMM 32-09-02/201, Air/Ground Relay System
(5)
AMM 32-09-03/501, Proximity Switch Electronics Unit
(6)
IPC 32-61-02 Fig. 31
C.
Access
(1)
Location Zone
755 Body Landing Gear, LH
765 Body Landing Gear, RH
D.
Install the Downlock Sensor (Fig. 401)
S 424-012
(1)
Do these steps to install the downlock sensor:
(a)
Twist the sensor wires together.
(b)
Attach the line that you kept in the conduit (during the removal) to the sensor wire ends.
(c)
Use the line to carefully pull the lead ends through the conduit.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
32-61-10
ALL ú ú 01 Page 404 ú Feb 10/96
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
(d) Install the mounting screws on the downlock sensor.
NOTE: A correctly installed sensor will give the clearance
____ as shown in Fig. 401. Clearance adjustment is usually not necessary. If the mounting bracket or the target have been moved or damaged, adjustment of the clearance can be necessary.
1) Before you measure the sensor-target clearance, make sure hydraulic power is removed from the body gear (hydraulic system no. 1) (AMM 29-11-00/201).
2) Measure the clearance between the sensor and the target and compare it to the valve shown on Fig. 401.
3) If adjustment is necessary, install the necessary shims or remove the laminations to get the clearance as shown on Fig. 401.
(e)
Cut the sensor wires to the correct length and install the new terminal lugs on the sensor wire ends.
(f)
Connect the terminal lugs on the sensor wires to the terminal strip.
(g)
Do a check of the terminal positions and the wire color code for the correct electrical connection.
CAUTION:_______MAKE SURE YOU SEAL THE ELECTRICAL TERMINALS. IF YOU DO NOT SEAL THE TERMINALS, CONTAMINATION CAN GO INTO THE JUNCTION BOXES AND CAUSE DAMAGE TO THE SENSORS.
(h)
Seal the electrical terminals: 1) Clean the bare surface of the terminals with the solvent. 2) Apply a thin layer of the primer on the bare surface of the
terminals and let the primer dry. 3) Apply the sealant on the surface of the terminals with a short bristle brush. 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：747-400 AMM 飞机维护手册 起落架 LANDING GEAR 9(82)
