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747-400
MAINTENANCE MANUAL
LEGEND
ACCESS DOOR AND ACCESS HOLE (INCLUDES PARTIAL-DEPTH RIBS)
REMOVABLE RIB OPEN ACCESS DOOR CLOSED ACCESS DOOR PERSON IN TANK ACCESS DOOR ADAPTER
NO. 2 MAIN TANK
WING STATION 944
NO. 1 MAIN TANK
8-INCH TO
4-INCH DUCT
RHINE
NO. 2 RESERVE TANK AIR AIR BLOWER
BLOWER HEATER/ 6-INCH TO
LEFT SURGE TANK (OPTIONAL) 8-INCH DUCT
FWD
8-INCH DUCT
RHINE AIR BLOWER AIR
6-INCH TOHEATER/ 8-INCH DUCT
BLOWER (OPTIONAL)
SURGE, RESERVE AND MAIN TANK VENTILATION
Tank Ventilation Equipment
Figure 203 (Sheet 3)
G57690
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747-400 MAINTENANCE MANUAL
6-INCH TORHINE 8-INCH DUCT
LEGEND
PUT A ROPE AROUND THE
EXHAUST VAPOR DUCT (50 FEET MINIMUM). ATTACH "DANGER OPEN FUEL TANK" SIGNS.
OPTION 3
CENTER WING TANK VENTILATION
Tank Ventilation Equipment
Figure 203 (Sheet 4)
50 FEET
CLASS I, DIVISION 1 0-18 INCHES ABOVE GROUND
G54873
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ú 01 Page 220
ú Jun 10/97
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747-400
MAINTENANCE MANUAL
SEE A BLOWER ACCESS DOOR ADAPTER
(MODEL BOE-501) VENTILATION EQUIPMENT BLOWER
CABLE GROUNDING AIR DUCT INLET SCREEN
BLOWER A
BLOWER
INLET SCREEN
EXAMPLE CONFIGURATION FOR
VENTILATION EQUIPMENT (MODEL BOE-501)
Tank Ventilation Equipment
Figure 203 (Sheet 5)
G54151
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747-400 MAINTENANCE MANUAL
8-INCH DUCTING
4-INCH DUCTING
BLOWER
2-INCH
DUCTING INLET
SCREEN
PNEUMATIC
ADAPTER TUBING
GROUNDING CABLE
AVAILABLE VENTILATION EQUIPMENT
Tank Ventilation Equipment
Figure 203 (Sheet 6)
G54181
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747-400 MAINTENANCE MANUAL
COTTON CAP (WITHOUT VISOR)
RESPIRATOR
APPROVED
COVERALL
SAFETY
LINE
BREATHING
AIR SUPPLY
INPUT
AIR SUPPLY STANDBYCOTTON HOSE RESPIRATORSOCKS
FILTER - REGULATOR OIL AND
CHARCOAL SEE A OIL FILTER PRESSURE
WATER MIST REGULATOR GAGE
FILTER FILTER
BREATHING
AIR
AIR INLET
DISTRIBUTION MANIFOLD
CAUTION
1 2 3 4 5
CO MONITOR
2
CO ALARM
2
PETCOCK
(OPTIONAL - RECOMMENDED)
DRAIN
FILTER - REGULATOR (EXAMPLE)
A
Respiratory Equipment and Clothing (Example) Figure 204
G54185
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