(2)
 Remove the related cove light panel (Ref. TASK 25-23-48-000-001), or the forward utility-area ceiling panel (Ref. TASK 25-23-42-000-001), or the aft utility-area ceiling panel (Ref. TASK 25-23-42-000-002).

R **ON A/C 001-049, 051-099, 101-105, 151-199, 201-299, 301-399,
 4. Procedure
_________
R **ON A/C 001-049, 051-099, 101-105, 201-299,
 (Ref. Fig. 401/TASK 23-73-48-991-001)
R 1EFF : 001-049, 051-099, 101-105, 151-199, 1 23-73-48Page 403 1201-299, 301-399, 1May 01/05 1 1 1CES 1

 Mount DEU A / DEU B
 Figure 401/TASK 23-73-48-991-001- 12 (SHEET 1)

R 1EFF : 001-049, 051-099, 101-105, 201-299, 1 23-73-48Page 404 1 1 May 01/05 1 1 1CES 1

 Mount DEU A / DEU B
 Figure 401/TASK 23-73-48-991-001- 22 (SHEET 2)

R 1EFF : 001-049, 051-099, 101-105, 201-299, 1 23-73-48Page 405 1 1 May 01/05 1 1 1CES 1 **ON A/C 151-199,

 (Ref. Fig. 401A/TASK 23-73-48-991-001-A) R **ON A/C 001-049, 051-099, 101-105, 151-199, 201-299,
 Subtask 23-73-48-020-050
 A. Removal of the DEU A/DEU B -Mount
 (1)
 Disconnect the electrical connector (2) from the DEU mount (1).

 (2)
 Put blanking caps on the disconnected electrical connectors.

 (3)
 Remove the related DEU A (Ref. TASK 23-73-46-000-001) or DEU B (Ref. TASK 23-73-47-000-001).

 (4)
 Remove the screws (3) and washers (4).

 (5)
 Remove the DEU mount (1).

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 INTENTIONALLY BLANK

R 1 1

23-73-48Page 407
1 1 May 01/04 1 1 1CES 1

 Mount DEU A / DEU B
 Figure 401A/TASK 23-73-48-991-001-A12 (SHEET 1)

R 1EFF : 151-199, 1 23-73-48Page 408 1 1 May 01/04 1 1 1CES 1

 Mount DEU A / DEU B
 Figure 401A/TASK 23-73-48-991-001-A22 (SHEET 2)

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 TASK 23-73-48-400-001
 Installation of the DEU A / DEU B - Mount
 1. Reason for the Job
__________________
 Self Explanatory
 2. Job Set-up Information
______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------
REFERENCE QTY DESIGNATION
 -------------------------------------------------------------------------------
No specific stepladder 0.5 m (1 ft. 8 in.)
 B. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
23-73-00-740-005 BITE Test of the Cabin Intercommunication Data System (CIDS) through the CFDS 23-73-46-400-001 Installation of the Decoder/Encoder Unit (DEU) A 200RH 23-73-47-400-001 Installation of the Decoder/Encoder Unit (DEU) B 300RH 24-42-00-861-001 Energize the Ground Service Network from the External Power 24-42-00-862-001 De-energize the Ground Service Network Supplied from
 the External Power 25-23-42-000-001 Removal of the Ceiling Panels - Forward Utility Area 25-23-42-000-002 Removal of the Ceiling Panels - Aft Utility Area 25-23-42-400-001 Installation of the Ceiling Panels - Forward Utility
 Area 25-23-42-400-002 Installation of the Ceiling Panels - Aft Utility Area 25-23-48-000-001 Removal of the Cove Light Panels 25-23-48-400-001 Installation of the Cove Light Panels
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 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
R  **ON A/C 001-049, 051-099, 101-105, 201-299,
 23-73-48-991-001  Fig. 401
 **ON A/C 151-199,
 23-73-48-991-001-A  Fig. 401A 
R  **ON A/C 001-049, 051-099, 101-105, 151-199, 201-299, 301-399,
 3. Job Set-up__________ 
R  **ON A/C 001-049, 051-099, 101-105, 151-199, 201-299,
 Subtask 23-73-48-860-050
 A. Aircraft Maintenance Configuration
 (1) Make sure that the aircraft electrcal circuits are energized. (Ref. TASK 24-42-00-861-001)
 (2) Make sure that the stepladder is below the related access panel.
 (3) Make sure that the related cove light panel (Ref. TASK 25-23-48-000-001), or the forward utility-area ceiling panel (Ref. TASK 25-23-42-000-001), or the aft utility-area ceiling panel (Ref. TASK 25-23-42-000-002) is removed. 
　
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