D
SHROUD DRAIN
APU Drains, Vents and Component Locations
Figure 1 (Sheet 3)
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MAINTENANCE MANUAL
APU Drains, Vents and Component Locations
Figure 1 (Sheet 4)
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MAINTENANCE MANUAL
DOOR
APU Drains, Vents and Component Locations
Figure 1 (Sheet 5)
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MAINTENANCE MANUAL
5. APU Fuel Drain Flame Arrester (Fig. 1)
_____________________________
A. The arrester consists of a housing, an explosion-proof element and provisions for connecting the drain tubing. Its element is made of corrugated steel tape contained in a manner that will allow unrestricted fuel drainage but will not allow a flame to enter the drain line.
B. The flame arrester is located at the lower end of a drain line just before it enters the drain mast. It passes any fuel drainage from the aft APU fuel line shroud.
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747-400 FAULT ISOLATION/MAINT MANUAL
APU DRAINS AND VENTS
COMPONENT 102 SHT FIG. QTY ACCESS/AREA AMM REFERENCE
VALVE - COMBUSTION CHAMBER DRAIN MAST - APU DRAIN
1 1 317AL, 318AR/310 (APU COMPARTMENT) 317AL, 318AR/310 (APU COMPARTMENT) 49-16-01 49-16-03
APU Drains and Vents - Component Index
Figure 101
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FAULT ISOLATION/MAINT MANUAL
APU
317AL, 318AR APU COMPARMENT, FUEL LINE SHROUD (REF) FWD FIREWALL (REF)
SEE B
APU DRAIN
MAST
ACCESS
DOOR, 315AL SEE C
SEE A
FLAME
ARRESTER
ACCESS DOOR, 315AL
A
DRAIN VALVE FOR THE COMBUSTION CHAMBER
SEE D
APU COMPARTMENT BOSS FOR THE
GASKET CASE (REF)
GAS GENERATOR
B
SEALING COVER
(REF)
GASKET RETAINING RING
DRAIN VALVE ASSEMBLY
DRAIN VALVE FOR THE
SPRING COMBUSTION
DRAIN VALVECHAMBER ADAPTER
DRAIN TUBE FOR THE COMBUSTION CHAMBER (REF)
FWD
APU DRAIN MAST DRAIN VALVE FOR THE COMBUSTION CHAMBER
C D
APU Drains and Vents - Component Location
Figure 102
F58213
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