Subtask 33-51-38-020-053
 A. Removal of the Battery of the Emergency Power-Supply Unit
 (1)
 Remove the screws (5) from the battery (6).

 (2)
 Carefully remove the battery (6) from the emergency power-supply unit (1).

 (3)
 Keep the battery (6) and/or the spare batteries under work shop conditions connected to a constant power source (Ref. CMM 335107).

 TASK 33-51-38-400-002

 Installation of the Battery of the Emergency Power-Supply Unit
 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 1.5 m (4 ft. 11 in.)
 B. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied from the External Power CMM 335107

R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
 33-51-38-991-001-A Fig. 401
 **ON A/C 301-399,
 33-51-38-991-001-B Fig. 401A FOR FIN 10WL 25-23-42-400-001 Installation of the Ceiling Panels - Forward Utility
 Area FOR FIN 13WL 24-41-00-861-002 Energize the Aircraft Electrical Circuits from the
 External Power
 35-21-41-400-001 Installation of the Emergency Oxygen Containers
 FOR FIN 11WL
 25-23-41-400-001 Installation of the Ceiling Panels

 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
25-23-44-400-001 Installation of the Lower Sidewall-Panels (Dado
 Panels)
 FOR FIN 12WL
 25-23-41-400-001 Installation of the Ceiling Panels
 25-23-44-400-001 Installation of the Lower Sidewall-Panels (Dado

 Panels) FOR FIN 14WL 25-23-41-400-001 Installation of the Ceiling Panels FOR FIN 15WL 24-41-00-861-002 Energize the Aircraft Electrical Circuits from the
 External Power
 25-23-41-400-001 Installation of the Ceiling Panels

 **ON A/C ALL
 3. Job Set-up
__________
 Subtask 33-51-38-865-056
 A. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU LIGHTING/EMER LT/CABIN 2WL H06 49VU LIGHTING/EMER LT/CABIN 1WL H05 122VU LIGHTING/CABIN/EMER/LT 3WL V07

R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
 Subtask 33-51-38-860-054
 B. Aircraft Maintenance Configuration
 (1)
 Make sure that the stepladder is in position:
 FOR 10WL
 at the left FWD passenger/crew door,
 FOR 13WL
 between the AFT passenger/crew doors.

 (2)
 Energize the aircraft electrical circuits (Ref. TASK 24-41-00-861-002).

 (3)
 On the overhead panel 25VU, make sure that the NO SMOKING switch 190RH is in the OFF position.

 (4)
 On the Forward Attendant Panel (FAP) 120RH, make sure that the LIGHT EMER pushbutton switch and its integral light are off.

 (5)
 If the emergency power-supply unit supplies overwing emergency lights, make sure that these overwing emergency lights operate:

 (a) Pull down and remove the cover flap from one of the related hatches.
 NOTE : The SLIDE ARMED light on the cabin lining at the emergency
____
 exits comes on.

 (b) Push the latch pin against the spring and turn it a quarter turn counterclockwise to retract it to the DISARMED position.
 NOTE : The SLIDE ARMED light goes off.
____
 (c)
 Make sure that the overwing emergency lights come on.

 (d)
 Push the latch pin against the spring and turn it a quarter turn clockwise to extend it to the ARMED position.

 NOTE : The SLIDE ARMED light comes on.
____
 (e)
 Make sure that the overwing emergency lights go off.

 (f)
 Install and close the removed cover flap on the related hatch. NOTE : The SLIDE ARMED light goes off.

____
　
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