-
the vacuum generator 37MG starts to operate.

-approx. 0.2 l (0.05 USgal) of water flows into one toilet bowl.
-air flows out of the ventilation port of the vacuum generator.
-the toilet flush valve (of the same toilet) opens and the suction removes the water.
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 -------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
R  - within 10 s after the flush 
R  cycle starts, push the flush 
R  switch 51MG in the same and/or 
R  a different lavatory again. 
R 
R 
R 
R 
R  4. On the altitude pressure switch 
R  43MG: 
R  - set the altitude to 18000 +100-
R  100 ft. (5486.29 +30.47 -30.47 
R  m). 
R  5. In one lavatory: 
R  - push the flush switch 51MG. 
R 
R 
R 
R 
R 
R  6. On the altitude pressure switch 
R  43MG: 
R  - set the altitude to 16000 ft. 
R  (4876.71 m). 
R  7. In a different lavatory: 
R  - push the flush switch 51MG. 
R 
R 
R 
R 
R 
R 
R 

-the vacuum generator continues to operate (first flush cycle not finished).
-a second or additional flush cycle does not start.
-the next flush cycle sequence is prevented for approx. 15 s after the first flush cycle starts.
In the vacuum toilet system:
-the vacuum generator 37MG will not operate.
-approx. 0.2 l (0.05 USgal) of water flows into the toilet bowl.
-the toilet flush valve opens and the water drains out of the toilet bowl.
In the vacuum toilet system:
-the vacuum generator 37MG starts to operate.
-approx. 0.2 l (0.05 USgal) of water flows into the toilet bowl.
-air flows out of the ventilation port of the vacuum generator.
-the toilet flush valve opens and the suction removes the water.
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R **ON A/C 057-099, 101-149, 151-199, 201-299, 301-399, 401-499,

 Subtask 38-31-00-710-053-A
 A. Do this test.
 NOTE : Make sure that the access panel 172AR is closed or the limit

____
 switch 44MG is pushed and hold in during the test.

 -------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
1. In all lavatories:  In the vacuum toilet system:
 - push each flush switch 51MG  - the vacuum generator 37MG starts to
 with a time delay of 15 +3 -3  operate each time when the flush
 s.  switch is pressed.
 - approx. 0.2 l (0.05 USgal) of water
 flows into the toilet bowl.
 - air flows out of the ventilation port
 of the vacuum generator.
 - the toilet flush valve opens and the
 suction removes the water.
 2. In two lavatories:  In the vacuum toilet system:
 - push the flush switches 51MG  - the vacuum generator 37MG starts to
 within 7 s.  operate.
 - approx. 0.2 l (0.05 USgal) of water
 flows into one toilet bowl.
 - air flows out of the ventilation port
 of the vacuum generator.
 - the toilet flush valve (of the same
 toilet) opens and the suction removes
 the water.
 3. In a lavatory:  In the vacuum toilet system:
 - Operate the flush switch 51MG  - the vacuum generator does not
 while the waste service panel  operate.
 is open.  - the flush does not occur.
 - on the FAP the message VACUUM SYSTEM
 DISABLED-GROUND SERVICING is shown.
 4. In the aircraft system:  In the vacuum toilet system:
 - Simulate a cabin differential  - The vacuum generator remains switched
 pressure of 260 mbar (3.77  off.
 psi).  - The flush occurs as required. 

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 -------------------------------------------------------------------------------
ACTION RESULT -------------------------------------------------------------------------------
-Operate the flush switch 51MG in one toilet.
 5. At the circuit breaker panel 2000VU or 2001VU:
　
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