3.
 On the Test Tone Generator:

-switch the White Noise test tone off.
 **ON A/C ALL
 Subtask 23-73-00-720-052
 -the sound pressure level must not be less than the value given in the table for the sound pressure levels. (Ref. Fig. 501A/TASK 23-73-00-991-005-A)
 NOTE : The location of the cabin
____ segments in relation to the seatrows is shown in CFDS/ LSP VOLUME REPORT (Ref. TASK 23-73-00-860-005).
-
the sound pressure level must not beless than the value given in thetable for the sound pressure levels.

In the cabin, all lavatories and at all attendant stations:

-
the test tone stops.

 C. Measurement of the automatic gain increase **ON A/C 001-049, 051-099, 101-105, 201-299,
 (Ref. Fig. 501/TASK 23-73-00-991-005) R **ON A/C 106-149, 151-199, 301-399, 401-499,
 (Ref. Fig. 501A/TASK 23-73-00-991-005-A)
R 1EFF : ALL 1 23-73-00Page D517 1 1 Aug 01/05 1 1 1CES 1 **ON A/C ALL

 (1) Put the microphone of the Sound Pressure Meter/ Range 90 - 130 dB/ Accuracy +/- 1 dB below the first pax loudspeaker.
 NOTE : The cockpit door must be closed during the whole test.
____
 -------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
1. On the Test Tone Generator:  In the cabin, in all lavatories and at all attendant stations:
 - select the White Noise test tone.  - the test tone is heard from allloudspeakers.
 At the Sound Pressure Meter:
 - the sound pressure level must not be less than the value given in the table for the sound pressure levels.

 **ON A/C 001-049, 051-099, 101-105, 201-299,
 (Ref. Fig. 501/TASK 23-73-00-991-005)

R  **ON A/C 106-149, 151-199, 301-399, 401-499,
 (Ref. Fig. 501A/TASK 23-73-00-991-005-A)
 **ON A/C ALL
 NOTE : Before you start the next test step make sure that all emergency
____
 oxygen- container door-stops are in the test position.

 2. In the cockpit on the overhead  In the cabin, in all lavatories and at panel 21VU: all attendant stations:
 -lift the switch guard, push and  - the doors of the emergency oxygen release the MASK MAN ON containers open to the test position. pushbutton switch.
 1EFF : ALL 1 23-73-00Page D518 1 1 Aug 01/05 1 1 1CES 1

 -------------------------------------------------------------------------------
ACTION RESULT -------------------------------------------------------------------------------
- the volume of the test tone increases.
 At the Sound Pressure Meter:
 - the value increases by approx. 4dB.
 3. In the cockpit on the overhead panel 50VU:  In the cabin, in all lavatories and atall attendant stations:
 - push to reset the OXYGEN TMR RESET pushbutton switch.  - the volume of the test tone decreasesto the normal level.
 At the Sound Pressure Meter:
 - the value decreases by approx. 4dB.
 4. In the cockpit on the overhead C/B panel 49VU:  In the cabin, in all lavatories and atall attendant stations:
 - open the C/B 2KS2 ENGINE/2/FADEC A/EIU2.  - the volume of the test toneincreases.
 At the Sound Pressure Meter:
 - the value increases by approx. 6dB.
 In the cabin, in all lavatories and at all attendant stations:
 - close the C/B 2KS2.  - the volume of the test tone decreases to the normal level.
 At the Sound Pressure Meter:
 - the value decreases by approx. 6dB.
 5. On the Test Tone Generator:  In the cabin, all lavatories and at all attendant stations:
 - set the White Noise test tone to 'off'. - the test tone stops.

 1EFF : ALL 1 23-73-00Page D519 1 1 Aug 01/05 1 1 1CES 1

 5. Close-up
________
 **ON A/C 001-049, 051-099, 101-105, 151-199, 201-299,

 Subtask 23-73-00-860-139-A
 A. Put the aircraft back to its initial configuration.
 (1)
 Put the cockpit handset back to the craddle.

 (2)
 On the PTP 110RH, set the PA-level to the initial values (Ref. TASK 23-73-00-860-004).

 (3)
 On the emergency containers turn the door-stops to the normal position and let them retract into their containers.

 NOTE : Spring tension retracts the door-stops automatically when they
____
 are in the normal position.

 (4)
 Make sure that the switch guard is in position on the MASK MAN ON pushbutton switch.

 (5)
 Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 3JH1, 2JH1, 3JH2, 2JH2
　
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