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MAINTENANCE MANUAL

ASEE TOILET TANK 
SEPARATOR WATER HOLE ANTI-SIPHON  FLOW HERE MEASURE  COVER-SHROUD DOOR VENT TOILET SEAT-
BOWL VENT TOILET  (EXAMPLE) LAVATORY

TOILET TANK
TOILET TANK VENT
TOILET TANK
A
NOTE: TOILET BOWL NOT SHOWN
Lavatory/Galley Ventilation Health Check Figure 503 (Sheet 1)
F16430
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GALLEY VENTS SEE B
AFT GALLEY 
GALLEY FORWARD
BSEE GALLEY VENTS  OF GRILLE CENTER POINT 
STRUCTURE CEILING 
MEASURE GRILLE FLOW HERE 
B Figure 503 (Sheet 2) Lavatory/Galley Ventilation Health Check GALLEY VENT (EXAMPLE) 

F16450
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MAINTENANCE MANUAL

 D. Access
 (1)  
Location Zones
 231 Passenger cabin - section 43 (LH side)
 232 Passenger cabin - section 43 (RH side)
 251 Passenger cabin - section 46 (LH side)
 252 Passenger cabin - section 46 (RH side)

 (2)  
Access Panel
 119BL Main equipment center

 E.
Prepare for the Test

 S 865-015
 (1)  
Supply the electrical power (AMM 24-22-00/201).

 S 015-016

 (2)  
Open the access door for the main equipment center, 119BL
 (AMM 06-41-00/201).

 S 865-017

 (3)  
Make sure these circuit breakers are closed:

 (a)  
On the overhead circuit breaker panel P11:
 1) 11N10, EQUIP COOLING FAN CONT AFT EXH 1
 2) 11N19, EQUIP COOLING FAN CONT AFT EXH 2

 (b)  
On the right miscellaneous electrical equipment panel P37: 1) 37D5, AFT EQPT FANS EXH 2

 (c)  
On the miscellaneous electrical equipment panel P70: 1) 70B2, AFT EQPT FANS EXH 1

 S 215-018
 (4)  Make sure the ventilation fans are on.
 NOTE: The ventilation exhaust air will come out of the outflow
____
 valve.

 S 865-019
 (5)  
Move the L and R RECIRC FAN switches on the air conditioning control panel, P5, to the ON position.

 S 215-020

 (6)
Make sure no EICAS messages for the equipment cooling system show.

 F.
Lavatory Ventilation Health Check

 S 715-021
 (1)  
Put a piece of 4-inch by 4-inch piece of tissue paper against the vent on the lavatory door.

 S 715-022

 (2)  
If the air flow into the lavatory holds the tissue paper against the grille, then there is adequate ventilation.

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 S 715-023
 (3)  
If the piece of tissue falls off the grille, then do the steps that follow:

 (a)  
Remove the toilet shroud (AMM 38-32-01/401).

 NOTE: You do not have to remove the toilet bowl to measure
____ the air velocity at the toilet bowl vent.
 (b)  
Make sure the vent lines are connected and are free of kinks.

 (c)  
Make sure the antisiphon hole on the water separator is free of blockage.

 (d)  
Measure the air velocity in the center of the bowl vent opening.
　
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