C. Polarization keys
 (1) General
 (Ref. Fig. 003)

 -
You can install the polarization keys E0391 only on all connectors E0390 of the first generation.

 -
You can install the polarization keys E0392 only on connectors E0390 of the second generation.

 ____
NOTE : The connectors E0390 of the second generation have the manufacturer P/N in a box with a 1 mm (0.0393 in.) thick white border.
 -The male polarization key will be installed on the fixed connector (plug or receptacle).
 (2)
 Installation (Ref. Fig. 003) To get a correct orientation of the polarization key, align, with two hexagonal wrenches, the mark and the polarization number written on the back of the connector. The mark on the polarization key is:

 -
A line on the female key (E0391A or E0392C).

 -
A dot on the male key (E0391B or E0392D).

 (a) E0391X
 -Engage the polarization key in its cavity.
 -Make sure the polarization key is oriented correctly.
 -Install the retaining clip (1).
 (b) E0392X
 -Engage the polarization key in its cavity.
 -Make sure the polarization key is oriented correctly.
 -Push until you hear a metallic click.

 (3)
 Removal
 (Ref. Fig. 004)

 (a) E0391X
 -Extract the clip (1).
 -Remove the polarization key.
 (b) E0392X
 -Push the polarization key with AIR-LB tool P/N 001901-003-00 or SOURIAU tool P/N 8665-133 . side M for male key (E0392D) . or side F for female key (E0392C)

20-44-24 Page 5
 Apr 01/05
R

R Connectors Type PREN3545 - Backshell and Polarization Key Installation E0391, E0392 and E0393 Figure 003

20-44-24 Page 6

R Connectors Type PREN3545 - Polarization Key Removal E0391 and E0392 Figure 004

20-44-24 Page 7

 until the retaining ring (2) is released.
 -Completely remove the polarization key by hand.
 D. Associated items
 (1) Backshell E0393
 (a) P/N identifi cation E0393 | | | | | D | | |-- 01|-------------- Evolution code--------------- Size code

 ---------------------- Standard P/N
 (2) protective sleeve E0680
 E. Attachments
 (1)
 Attachment on structure Tighten the attachment nut with AIR-LB tool P/N 001901-001-00 to torque values:

 -min.0.15 m.daN (13.2743 lbf.in)
 -max.0.20 m.daN (17.6991 lbf.in)

 (2)
 Coupling of the connector Tighten the coupling nut with SNAP-ON torque screwdriver 1/4 drive P/N QTSP135 with a hex head bit 1/4 drive size 3/32 ref TMA3 to torque values:

 -min.0.06 m.daN (5.3097 lbf.in)
 -max.0.10 m.daN (8.8495 lbf.in)

20-44-24 Page 8
 Apr 01/05
R

 ____________________________________________________________3. EN3545 connector With Female Contacts and With Male Contacts
 A. P/N identification
 (1) For the connector 
R  EN3545  E 05 F X A 13 B
 |  | |  | | | |  |
 |  | |  | | | |  -- Delivery condition code (A, B, D or no code)
 |  | |  | | | | 
R  |  | |  | | | ----- Polarization code | First number (1) = Polarization 
R  |  | |  | | |  Example: 13  | mark on 1 for A side 
R  |  | |  | | |  | Second number (3) = Polarization 
R  |  | |  | | |  | mark on 3 for B side 
R  |  | |  | | |  | Without code = Attachment system 
R  |  | |  | | |  | not delivered
 |  | |  | | |
 |  | |  | | ------- Equipment code  | A = female key for free connector
 |  | |  | |  | B = male key for fixed connector
 |  | |  | |  | Without code = Attachment system
 |  | |  | |  not delivered
 |  | |  | |
 |  | |  | --------- Contact type code | X = Crimp type
 |  | |  |
 |  | |  ----------- Connector and  | F = male connector, female contact
 |  | |  contact type code | M = female connector, male contact
 |  | |
 |  | -------------- Contact arrangement code
 |  |
 |  ---------------- Shell type code  | D : Non sealed
 |  | E : Sealed
 |
 ---------------------- Standard P/N

20-44-24 Page 9

 (2) For the polarization keys
　
中國航空網 www.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：A320 ESPM Electrical Standard Practices Manual 3(45)