FORWARD ENTRY DOOR
MAIN DECK CARGO COMPARTMENT
A

Cargo and Accessory Components Location
Figure 1 (Sheet 2)

C29452
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A

747-400 
MAINTENANCE MANUAL 
CREW LADDER 
HANDRAIL  OPENING CREW LADDER  RETAINING CLIP (2 LOCATIONS) 
NO. 1 LEFT 
ENTRY DOOR 
CREW 
LADDER 
SEE  A 
LADDER TOOL 
SEE  B  LADDER 
TOOL 
LADDER TOOL 
B 
HANDRAIL
LATCH 
LEVER 

LADDER FOOT FLOOR LATCH
CREW LADDER (EXTENDED POSITION)
A
Crew Ladder Figure 2
C30411
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A
747-400 MAINTENANCE MANUAL
 CARGO AND ACCESSORY COMPARTMENTS - CLEANING/PAINTING
____________________________________________________
 1.  General_______
 A. There are two tasks given in this procedure.
 (1)  
The first task gives instructions to clean the forward and aft cargo compartments.

 (2)  
The second task gives instructions to clean the cargo compartment and cargo conveyor system on the main deck.

 TASK 25-50-00-107-001
 2.  Clean the Forward and Aft Cargo Compartments____________________________________________
 A. General
 (1)  This task uses a high pressure spray and a vacuum to remove dirt, fluids, and other unwanted materials from the cargo compartments.
 B. Special Tools and Equipment
 (1)  
Vacuum Cleaner - Example: Dual Air Vac - Clarke Model TMDGU, Clarke Division Magraw Edison Co., 2800 Estas ST., Muskegon, MI 49441

 (2)  
Drum - 30 or 55 gallon capacity, mounted on casters

 (3)  
Hose Assembly - 6 foot length, 1 1/2-inch ID, with swivel connection to pump - Example: Graco Model 206-266 siphon tube

 (4)  
Hose - 50 foot length, 3/8-inch ID, 2250 psi working pressure with 3/8-inch pipe fittings at each end - Example: Graco Model 207-831

 (5)  
Spray Valve - 4 foot extension, nonatomizing fluid nozzle with 0.7-1.0 gpm and 40 to 50 degree fan - Example: Graco Model 208-008

 (6)  
Portable Airless Pump - Example: Graco Bulldog Model 207-463 Hydraclean Pressure Cleaner with 7.0 gpm output, 1200 psi working pressure,

 10:1 ratio pump on Pneumatic Cart Model 208-156, with Regulator Assembly 206-199, Graco Inc., 60-11th Ave. N.E., Minneapolis, MN 53440
 C. Consumable Materials
 (1)  Water base alkaline cleaner
 NOTE:____Use one of the cleaners given below. Make sure the equipment in the special tools and equipment paragraph can be used with the cleaner.
 (a)  
B00431 Allied Kelite 28

 (b)  
B00014 Calla 301

 (c)  
B00432 Cee Bee A-410B

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 D.
E.
F.
A
747-400 MAINTENANCE MANUAL
 (d)
B00005 Cee Bee 280

 (e)
B00013 Dubois C-1102

 (f)
B00003 GMC 528B

 (g)
B00433 Hydrex 09

 (h)
B00434 Metaclean AC

 (i)
B00008 Oakite 204

 (j)
B00017 Pacific Chemical B-82

 (k)
B00260 Pennwalt (Delchem) 2271R
　
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