-Maintain the parting of the cables to facilitate the re-entry of the new harpoon tie into the loom and the raceway.
-Discard the old retainers and fit new ones.
-When it is impossible to sever the head of the harpoon tie by the previous means, the only method to release the retainer and fairlead is to use a thin-bladed implement :
-Insert a thin-bladed end between the latch of the retainer and the indentation of the harpoon tie tail and then gradually remove the retainer up the tail.
-
Remove and discard the retainer.
-
Remove and discard the fairlead. This method requires the portion to still be in the raceway and must be reused. Therefore it is important that damage is not caused to the indentation in the tie. A normal application tool cannot be used to tighten the new fairleads and retainer on the reassembly because the tail is already removed.
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_______
3. ABS0689
A. P/N identification ABS0689 - A 01
------- - --
| | |
| | |
| | -------- Size code
| |
| ---------- Type code : B = pressure pad
| A = retainer bridge
|
----------------- Standard P/N
B. P/N characteristics (Ref. Fig. 003)
(1)
Operating temperature is -55 deg.C (-67.00 deg.F) to + 120 deg.C
(248.00 deg.F).
(2)
Standard assembly raceways comprise :
-retainer bridge (ABS0689AXX),
-pressure pad (ABS0689B01),
-raceway (no Standard P/N but miscellaneous drawing number possible).
(3)
Type and Size code -------------------------------------------------| TYPE CODE | SIZE CODE | DESIGNATION | |-------------|-------------|-------------------| | A | 01 | RETAINER BRIDGE | |-------------|-------------|-------------------| | A | 02 | RETAINER BRIDGE | |-------------|-------------|-------------------| | A | 03 | RETAINER BRIDGE | |-------------|-------------|-------------------| | A | 04 | RETAINER BRIDGE | |-------------|-------------|-------------------| | A | 05 | RETAINER BRIDGE | |-------------|-------------|-------------------| | B | 01 | PRESSURE PAD | -------------------------------------------------
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Raceway assemblies - Details
ABS0689
Figure 003
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C. Installation procedure
(1) Installation of raceway (Ref. Fig. 003, 004) The raceways are to be aligned for installation. This is judged by eye with the aid of a steel rule which is placed across the webs of the raceways. The relative position of the raceway channels is oriented by a suitable template. For orientation of the height position of the raceways relative to one another, disks according to AN960D10 are to be used, if required. If it is not possible to install the raceways aligned (judged by eye with the aid of a steel rule) or if the gap between two raceways is greater than 6 mm (0.2362 in.), the cable harnesses are to be supplied with a shrink sleeve (of approx. 80 mm (3.1496 in.) length) as per NSA937210. Bonding connections are to be made.
NOTE : Since the joining faces are also used as bonding connections, make sure that the faces are cleaned to bare metal and the drill holes for anchor nuts are not covered with sealing compound.
(2) Installation of cables in raceways
(Ref. Fig. 003, 004)
-Route the cables in the applicable raceway channel. Make sure that the fill factor of max. 65 % is not exceeded. Make sure that all the cable harnesses lie in the raceway channels without being tensioned or twisted. No loops must have formed in the electrical cables. For junctions of cable harnesses from raceways, the cables must not be routed across the web edges.
-If the gap between two raceways is greater than 6 mm (0.2362 in.), the cable harnesses are to be supplied with a shrink sleeve (of approx. 80 mm (3.1496 in.) length) as per NSA937210.
-Press by hand to install the retainer bridges on the raceways until they are engaged. The retainer bridges are supplied with a "nose" which must be pointed upwards after installation.
-When all the bridges have been installed, the pressure pads are to be pressed into the retainer bridges so that the cables are properly attached in the raceway channel. The pressure pads must engage in the serrations of the bridges and must be positioned in the respective positions supplied for them.
-Take care that : The insulation of the cables must not be damaged or deformed. The cables must not lie between the pressure pad and raceway channel wall. If a raceway channel has no cable inside, do not install the pressure pads in the channel.
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本文链接地址：A320 ESPM Electrical Standard Practices Manual 2(77)
