S 212-034

 (6)  
Make sure the drain gutter around the PDU base is clean.

 S 212-036

 (7)  
Make sure the hose from the drain gutter to the lower case of the PDU is clear.

 TASK 51-41-12-402-061
 7.  PDU Drain Gutters Installation______________________________
 A. References
 (1)  
AMM 20-30-02/201, Adhesives, Cements, and Sealants

 (2)  
AMM 20-30-88/201, Solvent - Series 88

 B. Consumable Materials
 (1)  
A00247 Sealant - BMS 5-95, Class B

 (2)  
B00062 Acetone - JIS-K-1503

 C. Access
 (1)  Location Zones
 151/152 Area Aft of Bulk Cargo Compartment

 D. Procedure
 S 112-045
 (1)  
Clean the bonding surfaces with acetone.

 S 142-046

 (2)  
Use the medium grit sand paper to rub the bonding surfaces of polyurethane drain until there are no shiny surfaces.

 (3)
Prepare the adhesive, refer to the manufacturer's instructions.

 S 392-048

 (4)  
Use the clamps or deadweight to apply mixed adhesive and bond under the light pressure

 S 392-047
 TASK 51-41-12-202-037
 8. Examine the Floor Drains (Fig. 204)
________________________
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 51-41-12
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A
747-400
MAINTENANCE MANUAL

(4 LOCATIONS) FASTENER
FLOOR DRAIN ASEE  COVER 
DRAIN LINE DRIP PAN RETRACTABLE PDU BSEE 
CSEE CONFIGURATION ALTERNATIVE DRAIN  A FLOOR DRAIN 
BEAM FLOOR 

LATCH (2 LOCATIONS) HOSE CLAMP (2 LOCATIONS)
CARGO
COMPARTMENT

DRAIN LINE
HINGE
CEILING (2 LOCATIONS)
DRIP PAN RETRACTABLE PDU
B
ALTERNATIVE DRAIN CONFIGURATION
C
Floor Drains and Pans
Figure 204

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 A. Access
 (1)  Location Zones
 151/152 Area Aft of Bulk Cargo Compartment

 B. Procedure
 S 032-038
 (1)  
Remove the cover with holes from the floor drain.

 S 212-039

 (2)  
Make sure the receptacle is clean.

 TASK 51-41-12-202-041
 9. Examine the Drip Pans Under Retractable Power Drive Units (Fig. 204)
_________________________________________________________
 A. Equipment
 (1)  Hose - Water, Garden Variety or Equivalent
 B. Access
 (1)  Location Zones
 151/152 Area Aft of Bulk Cargo Compartment

 C. Procedure
 S 032-042
 (1)  
Unlatch and lower the drip pans that are in the ceiling of the aft luggage compartment.

 S 162-043

 (2)  
Clean the pans and hoses if they are necessary.

 S 212-044

 (3)  
Make sure the drain hoses from all receptacles and pans are clear.

 NOTE: The water continues to drain away freely.
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747-400 MAINTENANCE MANUAL
 BONDED RUB PADS - REPAIRS
_________________________
　
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