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时间:2011-03-27 22:14来源:蓝天飞行翻译 作者:航空
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 E0438 YV 
R  E0471 QP (3 YV)
 NSA935308 YU
 ______________________2. Damage Check Procedure 
R  A. Cables, Unscreened, Low Temperature 180 deg.C (356.00 deg.F)
 (1) Cable Layout
 (Ref. Fig. 001)
 (2) Table for Damage Assessment
 (Ref. Fig. 001) 
R  (3) When the repair is selected, refer to: 
R  (a) Para. 3 Repair Procedure for the general description and 
R  conditions of application. 
R  (b) 20-53-29 GENERAL REPAIR PROCEDURE for more data. 
R  B. Cables, Screened, Low Temperature 260 deg.C (500.00 deg.F) 
R  (1) Cable Layout 
R  (Ref. Fig. 002, 003) 
R  (2) Table for Damage Assessment 
R  (Ref. Fig. 002, 003) 
R  (3) When the repair is selected, refer to: 
R  (a) Para. 3 Repair Procedure for the general description and 
R  conditions of application.

 


R Layout and Table for Damage Assessment R AD, ADB, ADC, ADD and ADE Figure 001


20-53-25 Page 2

R Layout and Table for Damage Assessment R VNA, VNB, VNC and VND R Figure 002


20-53-25 Page 3

R Layout and Table for Damage Assessment R VNA, VNB, VNC and VND R Figure 003


20-53-25 Page 4

R (b) 20-53-29 GENERAL REPAIR PROCEDURE for more data.

R  C. Aluminum Feeder Cables 
R  (1) Cable Layout 
R  (Ref. Fig. 004) 
R  (2) Table for Damage Assessment 
R  (Ref. Fig. 004) 
R  (3) When the repair is selected, refer to: 
R  (a) Para. 3 Repair Procedure for the general description and 
R  conditions of application. 
R  (b) 20-53-29 GENERAL REPAIR PROCEDURE for more data. 
R

 

20-53-25 Page 5

R Layout and Table for Damage Assessment QP, YU and YV
R Figure 004


20-53-25 Page 620-53-25 Page 7

R  ________________3. Repair Procedure 
R  A. Procedure 
R  (Ref. Fig. 005, 006, 007, 008) 
R  This paragraph gives the general description and conditions of 
R  application for each repair type. 
R  (1) Method 2A or 4A - Wrapping with PTFE tape Material No 05-116 
R  Ref. 20-53-29 for detailled procedure. 
R  (2) Method 2B or 4B - Heat-Shrink Sleeve Insulating 
R  (3) Method 2C 
R  (a) Disconnect the cable end. 
R  (b) Install the heat-shrink sleeve. 
R  (c) Install the two solder sleeves. 
R  (d) Engage the solder sleeve on the cable and the shielding link 
R  (wire CF 22). 
R  (e) Turn the solder sleeve when you engage it on the bonding wire so 
R  that it does not catch the strands. 
R  (f) Center the solder on the stripped portion of the bonding wire and 
R  shield. 
R  (g) Heat the center of the sleeve (do not turn the assembly when you 
R  do this) until the sleeve shrinks (the solder ring melts and 
R  flows into the strands of the bonding wire and shield). 
R  (h) Let cool for a few seconds. 
R  (i) Do the operation again for the other side from step (d). 
R  (j) Install the heat-shrink sleeve. 
R  (k) Shrink the sleeve.
R  ____NOTE : PTFE requires a minimum temperature of 327 deg.C (620.60 
R  deg.F) for the shrinking. At level of the two solder 
R  sleeves, it is necessary to prevent overheat of the 
R  solder.

 


R Repair of Unscreened Low-Temp Cables - Repair Procedure Table R VNA, VNB, VNC and VND R Figure 005


20-53-25 Page 8

R Repair of Unscreened Low-Temp Cables - Repair Procedure Table R VNA, VNB, VNC and VND R Figure 006


20-53-25 Page 9

R Repair of Aluminum Feeder Cables - Repair Procedure Table QP, YU and YV Figure 007


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R Repair of Aluminum Feeder Cables - Repair Procedure Table QP, YU and YV Figure 008


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R  (4) Method 2D 
R  (a) Disconnect the cable end. 
R  (b) Install the heat-shrink sleeve. 
R  (c) Install the two solder sleeves. 
R  (d) Install the screened sleeve. 
R  (e) Turn the solder sleeve when you engage it on the screened sleeve 
R  so that it does not catch the strands. 
R  (f) Center the solder on the screened sleeve and shield. 
 
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