1EFF : ALL 1 28-11-00Page 9 1 1 Aug 01/05 1 1 1CES 1
C. Water Drain Valves
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
(Ref. Fig. 003)
**ON A/C 301-399,
(Ref. Fig. 003A)
**ON A/C ALL
Each tank has one or more water drain valves. These are used to:
-
drain the water from the fuel in the fuel tanks
-
drain all the remaining fuel from the tank (for maintenance).
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
The water drain valves are installed at the lowest part of each tank as
follows:
- outboard of RIB22 (vent surge tank drain)
- outboard of RIB15 (wing-tank outer-cell drain)
- outboard of RIB1 (wing-tank inner-cell drain)
-inboard of RIB1 LH and RH (center tank drain).
D. Clack Valves
(Ref. Fig. 001)
Clack valves are at the bottom of the RIB2.
**ON A/C 301-399,
The water drain valves are installed at the lowest part of each tank as
follows:
- outboard of RIB22 (vent surge tank drain)
- outboard of RIB1 (wing tank drain)
-inboard of RIB1 LH and RH (center tank drain).
D. Clack Valves
(Ref. Fig. 001A)
Clack valves are at the bottom of the RIB2 and the RIB22.
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Water Drain Valves
Figure 003
R 1EFF : 001-049, 051-099, 101-149, 151-199, 1 28-11-00Page 11 1201-299, 401-499, 1Aug 01/05 1 1 1CES 1
R Water Drain Valves
R Figure 003A
1EFF : 301-399, 1 28-11-00 Page 12
1 1 May 01/04
1 1
1CES 1
**ON A/C ALL
The clack valves in the RIB2 let the fuel enter the area between RIB1 and RIB2 but do not let fuel outboard of the RIB2. This makes sure that the main fuel pumps are always in fuel (Ref. 28-21-00).
**ON A/C 301-399,
The clack valves in the RIB22 let the fuel that has entered the vent surge tanks return to the related wing tank. The clack valves do not let fuel enter the vent surge tanks from the wing tanks (Ref. 28-12-00).
**ON A/C ALL
4.
Power Supply
____________
Not applicable
5.
Interfaces
__________
Not applicable
6.
Component Description
_____________________
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
A. Water Drain Valve 21QM(22QM), 23QM(24QM), 25QM(26QM), 94QM, 95QM (Ref. Fig. 003)
The primary components are:
-the body, which has a mounting flange
-a remote inlet (wing-tank water drain only)
-
an outer valve and spring
-
an inner valve and spring
-a support guide.
**ON A/C 301-399,
A. Water Drain Valve 21QM(22QM), 25QM(26QM), 94QM, 95QM
(Ref. Fig. 003A)
The primary components are:
-the body, which has a mounting flange
-a remote inlet (wing-tank water drain only)
1EFF : ALL 1 28-11-00Page 13 1 1 Aug 01/05 1 1 1CES 1
-
an outer valve and spring
-
an inner valve and spring
-a support guide.
**ON A/C ALL
The mounting flange connects the valve to the aircraft skin. The body contains the inner and outer valves and springs. The inner valve is installed in the outer valve and the springs keep the two valves in the closed position. The support guide keeps the two valves aligned when they operate. The remote inlet has a short pipe connected to it, which goes to the lowest part of the fuel tank.
The water drain valves in the center tank and the vent surge tanks do not have a remote inlet. Thus they only drain their adjacent area.
7. Operation/Control and Indication________________________________ The operation of the tanks is fully automatic. There is no control of the vent system and it gives no indications.
8. BITE Test_________ Not applicable
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TANKS - SERVICING
_________________
R
TASK 28-11-00-600-003
Removal of Microbiological Particles
WARNING : PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU
_______
START A TASK ON OR NEAR:
-
THE FLIGHT CONTROLS
-
THE FLIGHT CONTROL SURFACES
