- the forward sump
- the fan case
- the oil/fuel heat exchanger
- the VBV
- the VSV
- the TCC
- the aft sump
- the fuel shroud pipe. For the shroud pipe no leakage is permissible, a separate drain line enables a clear leakage identification.
- the 6 o'clock fire bulkhead.
- FRV
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R Drain and Vent Schematic Figure 001
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Drain System
Figure 002
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E E Based on two hour total flight profile (start, taxi, takeoff, cruise, descent, taxi), the individual reservoir volumes are twice the accumulated
R liquid level based on acceptable leakage rates. The volumes provide R sufficient containment margin to discriminate between excessive and R acceptable leakage rates. R Fuel, Oil or hydraulic leakage limits are given in 71-00-00 P.Block 501. R
3. Component Location
__________________
(Ref. Fig. 002, 003)
A. Drain Collector Assembly The drain collector assembly is attached to the aft side of the engine gearbox.
B. Drain Module The drain module is attached directly to the aft side of the engine gearbox. It supports the drain mast.
C. Drain Mast The drain mast is frangible below the cowl exterior surface to prevent damage to the engine gearbox. Should the drain mast strike the ground (or any object), the portion of the mast below the the cowling will break away.
4. Component Description
_____________________
A. Drain Collector Assembly (Ref. Fig. 004) The drain collector assembly is composed of 4 drain collectors with manual drain valves and 2 holding tanks. The collector retains fluids until it is filled. Then the fluids overflow onto the holding tanks.
B. Drain Module (Ref. Fig. 005, 006) It supports the drain mast which protrudes through the fan cowl doors into the airstream. A pressure valve which is a part of the drain module, admits ram air at 200 Knots. It pressurizes the holding tanks and enables discharge of any accumulated fluid overboard through the drain mast.
5. Material
________ All tanks/collectors and tubing are CRES to meet fireproof requirements. Each leak isolation collector has a push-to-test poppet valve. The portion of the drain system extending outside of the cowl contour is made of frangible polyphenylene sulfide plastic. This breaking away in the event of contact with the runway.
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General Location
Figure 003
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Collector Assembly
Figure 004
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Drain Mast
Figure 005
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Drain Module
Figure 006
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DRAIN MODULE - REMOVAL/INSTALLATION
___________________________________ TASK 71-71-41-000-041 Removal of the Drain Module
1. Reason for the Job
__________________
Self Explanatory
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific container 1USgal (4l) No specific protective covers No specific warning notice
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
71-13-00-010-040 Opening of the Fan Cowl Doors 71-71-41-991-300 Fig. 401
3. Job Set-up
__________ Subtask 71-71-41-941-050
A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
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