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MAINTENANCE MANUAL
ON THE TOP AND BOTTOM E/E Card Assembly Installation Figure 402
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B. Procedure
S 914-087
CAUTION: DO NOT TOUCH THE CARD ASSEMBLIES BEFORE YOU DO THE PROCEDURE
_______ FOR DEVICES THAT ARE SENSITIVE TO ELECTROSTATIC DISCHARGE. CARD ASSEMBLIES ARE ELECTROSTATIC SENSITIVE. ELECTROSTATIC DISCHARGE CAN CAUSE DAMAGE TO DEVICES IN THE CARD ASSEMBLIES.
(1)
Do the procedure for devices that are sensitive to electrostatic discharge (AMM 20-41-02/201).
S 424-088
(2)
Put the card assembly into the guide. Carefully push the card in until it correctly engages with the electrical connector.
S 214-089
(3)
Make sure the ejectors touch the card.
S 864-090
(4)
Close the applicable circuit breakers.
(5)
Close the card file door.
S 414-091
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FLUID LINE TUBING CLAMPS - REMOVAL/INSTALLATION
_______________________________________________
1. General
_______
A. This procedure contains these tasks:
(1)
The removal of tubing clamps.
(2)
The installation of tubing clamps.
(3)
The installation of protective lacing.
B. Different types of clamps hold the fluid system tubing:
(1)
Block clamps are used to hold a number of fluid lines at a specified locations.
(2)
Loop-type cushioned tube clamps are used in fluid line installations to reduce vibration and wear of lines.
C. Before you install a nylon loop-type clamp,
do a test of the clamp as follows:
(1) Open the clamp to approximately 1.5 times the tube diameter.
NOTE: Do this 3 or 4 times to make sure the clamp is flexible.
____ If the clamp cracks, do not use the clamp.
D. Clampshell clamp assemblies are made of three parts:
-two identical clampshells
-a cushioned or an uncushioned loop-type clamp as applicable for the installation.
E. If there is too much wear, replace the clamp. Replace the entire clamp assembly, even though only one component part has too much wear.
F. There are two types of clampshell clamps.
(1)
Unplated shells: These are for high vibration and high temperature (up to 800°F) areas.
(2)
Cadmium plated shells: These are for aluminum tubing only and are limited to temperature of 400°F.
TASK 20-11-24-004-001
2. Tubing Clamp - Removal
______________________
A. Procedure - Remove Clampshell Type Clamps (Fig. 401)
S 024-002
(1) Remove the clamp and the clampshell halves.
B. Procedure - Remove Block Type Clamps
S 034-003
(1)
Remove the nuts, bolts, and washers that hold the clamp block assemblies together.
(2)
Remove the block assemblies.
S 024-004
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TUBE (REF) 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 STANDARD PRACTICES - AIRFRAME(76)
