(e)
Use the keyboard to put in 22.
__
(f)
Push the ENTER key.
(g)
When OK shows, push the YES key.
(h)
Push the + key until the identification number of the replaced sensor shows.
(i)
Turn the null adjustment cam (9) until the value on the WBC is between 28,482 and 31,696.
NOTE: Wait at least 1 minute after cam adjustment for the WBC
____
readout to change.
(j)
Tighten the outboard mounting bolt (4) to 60 |5 pound-inches.
(k)
Make sure the value on the WBC is between 21,518 and 39,518.
(l)
Push the nose landing gear to make it move up and down.
(m)
Make sure that the value on the WBC is again between 21,518 and 39,518.
I. Put the Airplane Back to Its Usual Condition.
S 864-115
(1)
Make sure these circuit breakers are closed:
(a)
P414 Power Distribution Center - Left
1) 414K20 WT & BAL
(b)
P415 Power Distribution Center - Right
1) 415G21 WBS CHB ALT
(2)
Lower the nose landing gear (AMM 07-11-03/201).
S 864-036
(3)
Remove the electrical power if it is not necessary
(AMM 24-22-00/201).
S 584-066
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31-41-06
ALL ú ú 08 Page 418 ú Feb 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
IN-AXLE MOUNT - REMOVAL/INSTALLATION
____________________________________
1. General
_______
A. There are two tasks in this procedure. The first task is the removal of the in-axle mount (IAM). The second task is the installation of the in-axle mount.
B. The nose landing gear axle contains two in-axle mount assemblies which hold the nose landing gear load sensors for the weight and balance system. One mount is in the left side and one is in the right side of the axle.
TASK 31-41-07-024-030
2. In-Axle Mount Removal
_____________________
A. Special Tools and Equipment
(1) IAM Installation Tool
Honeywell P/N 4065501
B. Standard Tools and Equipment
(1)
Axle jacks
(2)
Socket for Axle Nut - MIT65B01202-1
C. References
(1)
AMM 07-11-03/201, Jacking Airplane Axles
(2)
AMM 09-11-00/201, Towing
(3)
AMM 31-41-06/401, Nose Landing Gear Load Sensors
D. Access
(1) Location Zone
715 Nose Landing Gear
E. Procedure
S 494-064
WARNING: MAKE SURE THE GROUND LOCKS ARE INSTALLED ON ALL THE LANDING
_______ GEAR. WITHOUT THE GROUND LOCKS, THE LANDING GEAR CAN RETRACT AND CAUSE INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT.
(1)
Make sure the ground locks are installed on the nose and main landing gear (AMM 09-11-00/201).
S 014-002
(2)
Remove the sensors from the nose landing gear axle
(AMM 31-41-06/401).
S 584-060
(3)
Lift the nose landing gear axle on a jack to make sure all the weight is off the nose landing gear (AMM 07-11-03/201).
S 034-051
(4)
Get access to the in-axle mount:
(a) Disconnect the cable assembly from the outboard ring.
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31-41-07
ALL ú ú 01 Page 401 ú Oct 10/93
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
A
AXLE A
NOSE LANDING GEAR
CABLES SENSOR RING INBOARD OUTBOARD RING SENSORS
AXLE IAM AND SENSOR INSTALLED IN AXLE A-A
In-Axle Mount Location Figure 401
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