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R  drain funnels. Clamps attach the drain pipes on brackets. 
R 
R  Air-Stop Drain Valve 5000MM (5001MM) 
R  Each air-stop drain valve installed in the FWD and AFT drain systems, has a 
R  valve body with inlet/outlet ports, diaphragm, heating plate, thermostat and 
R  a manual lift rod. The air-stop drain valves prevent leakage of the cabin 
R  air through the drain pipes. 
R  4. Power Supply____________ 
R 
R  For the FWD Cargo Compartment 
R  The NORMAL 1 busbar 110XP-A supplies 115 V AC to the air-stop drain valve 
R  heater elements. 
R  The NORMAL 1 busbar 110XP-B supplies 115 V AC to the drain mast and drain 
R  pipe heater elements. The control unit of the heater elements is supplied 
R  with 28 V DC from the GND/FLT busbar 602PP. 
R 
R  For the AFT Cargo Compartment 
R  The GND/FLT busbar 212XP-A supplies 115 V AC to the air-stop drain valve, 
R  the drain mast and the drain pipe heater elements. The control unit of the 
R  heater elements is supplied with 28 V DC from the GND/FLT busbar 602PP. 
R  **ON A/C 001-049, 101-105, 
R  5. Operation_________
 The rain water and spilt liquids that may have collected in the cargo
 compartments, flow out through the outlet points. From the outlet points,
 the liquid moves through the sleeves, elbows and the flexible hoses into the
 tee. The tee lets the liquid out into the fuselage lower shell where the
 collected liquid is let out of the aircraft.

 CES  CES

R  **ON A/C 051-051, 
R  5. Operation_________ 
R 
R  The rain water and spilt liquids that may have collected in the cargo 
R  compartments flow out through the outlet points. From the outlet points the 
R  liquid moves through the drain funnels and drain pipes into the inlet port 
R  of the air-stop valve. The air-stop valve opens automatically when a 
R  sufficient amount of liquid has collected in the valve. This prevents a 
R  continuous leakage of cabin air. From the air-stop valve the liquid moves to 
R  the drain mast.The drain mast lets the liquid out of the aircraft. The 
R  liquid flows to the drain mast through gravity when the aircraft is on the 
R  ground. Differential pressure makes the fluid flow to the drain mast during 
R  flight.

 

 DRAINAGE - FWD/AFT CARGO COMPARTMENT - SERVICING
________________________________________________
 TASK 25-53-00-000-001
 Removal of Drainage - FWD or AFT Cargo Compartments
 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 plugs
 No specific circuit breaker(s) safety clip(s)

 B. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
25-52-24-000-001 Removal of the Roller Assy 2501MM or (2601MM) 53-22-14-000-001 Removal of the FWD Cargo-Compartment Floor-Panels 53-42-14-000-001 Removal of the AFT Cargo-Compartment Floor-Panels
 Zone 150 25-53-00-991-001-A Fig. 301 25-53-00-991-005 Fig. 302 25-53-00-991-002 Fig. 303 25-53-00-991-006 Fig. 304 25-53-00-991-003 Fig. 305 25-53-00-991-007 Fig. 306 25-53-00-991-004 Fig. 307 25-53-00-991-008 Fig. 308

 3. Job Set-up
__________
 Subtask 25-53-00-865-056
 A. Open, safety and tag this(these) circuit breaker(s):
 -------------------------------------------------------------------------------PANEL SERVICE IDENT. LOCATION -------------------------------------------------------------------------------2000VU SEMI AUTO CLS/FWD 2MY B3 2000VU SEMI AUTO CLS/FWD 3MY B1 2000VU ICE PROT/DRAINMAST/FWD 1DU D2 2000VU ICE PROT/CARGO DRAIN/VALVE 20DU D4 2001VU SEMI AUTO CLS/AFT 102MY E3 2001VU SEMI AUTO CLS/AFT 103MY E1 2001VU DRAIN MAST/MID 21DU D6 2001VU CARGO DRAIN/VALVE 32DU D8
 Subtask 25-53-00-010-051
 B. Get Access
 (1)
 Remove the floor panels 131LF, 131SF, 131TF, 132TF in the FWD cargo compartment (Ref. TASK 53-22-14-000-001).
　
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