Loudspeaker
 Figure 401/TASK 31-53-21-991-001
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 TASK 31-53-21-400-001
 Installation of the Loudspeakers (7WW,8WW)

 1.
 Reason for the Job

__________________
 Self Explanatory

 2.
 Job Set-up Information

______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
31-50-00-710-002 Operational Test of the Flight Warning Computer (FWC) 31-53-21-991-001 Fig. 401
 3. Job Set-up
__________ Subtask 31-53-21-865-051
 A. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU CAPT/LOUD/SPKR 5WW F10 121VU EIS/F/O/LOUD/SPKR 4WW P08
 4. Procedure
_________ (Ref. Fig. 401/TASK 31-53-21-991-001) Subtask 31-53-21-420-050
 A. Installation of the Loudspeakers
 (1)
 Clean the component interface and/or the adjacent area.

 (2)
 Do an inspection of the component interface and/or the adjacent area.

 (3)
 Remove the blanking caps from the connectors (1) and (2).

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 (4)
 Make sure that the connectors (1) and (2) are in the correct condition.

 (5)
 Connect the connector (1) to the receptacle (2).

 (6)
 Install the loudspeaker (4) in its housing (5). Hold the loudspeaker in position.

 (7)
 Tighten the four locking screws (3).

 (8)
 FOR 7WW Install the thermoformed cover on the left instrument panel. FOR 8WW Install the thermoformed cover on the right instrument panel.

 Subtask 31-53-21-865-052
 B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): FOR 7WW 5WW FOR 8WW 4WW
 Subtask 31-53-21-710-051
 C. Do the operational test of the Flight Warning Computer (FWC) (Ref. TASK 31-50-00-710-002)
 5. Close-up
________
 Subtask 31-53-21-860-050
 A. Make sure that the work area is clean and clear of tool(s) and other items.
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________________________________________________
 TASK 31-53-33-000-001
 Removal of the Audio Mixing Box (15WW)
 1.
 Reason for the Job

__________________
 Self Explanatory

 2.
 Job Set-up Information

______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------
REFERENCE  QTY DESIGNATION
 -------------------------------------------------------------------------------
No specific blanking caps
 No specific circuit breaker(s) safety clip(s)
 No specific access platform 1.6 m (5 ft. 3 in.)

 B. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE  DESIGNATION
 -------------------------------------------------------------------------------
24-42-00-861-001  Energize the Ground Service Network from the External Power R 52-41-00-410-002 Close the Avionics Compartment Doors after Access 31-53-33-991-001 Fig. 401
 3. Job Set-up
__________
 Subtask 31-53-33-861-050

 A. Energize the ground service network
 (Ref. TASK 24-42-00-861-001).

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 B. Get Access
 (1) Put an access platform at the access door 811 of the avionics compartment.
R  (2) Open the access door 811 (Ref. TASK 52-41-00-410-002). Subtask 31-53-33-865-050
 C. Open, safety and tag this(these) circuit breaker(s):
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------
121VU AUDIO MIXING  14WW K03
 4. Procedure
_________
 (Ref. Fig. 401/TASK 31-53-33-991-001)
 Subtask 31-53-33-020-050
　
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