DRAIN MAST - REMOVAL/INSTALLATION
_________________________________ TASK 28-13-43-000-001 Removal of the Drain Mast WARNING : OBEY THE FUEL SAFETY PROCEDURES.
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 1.
 Reason for the Job

__________________
 Self Explanatory

 2.
 Job Set-up Information

______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific blanking plugs
 B. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
28-00-00-910-001 Fuel Safety Procedures 53-35-13-000-001 Removal of the Belly Fairing Access Panels 28-13-43-991-001 Fig. 401
 3. Job Set-up
__________ Subtask 28-13-43-941-050
 A. Safety Precautions
 (1) Obey the fuel safety procedures (Ref. TASK 28-00-00-910-001). Subtask 28-13-43-010-050
 B. Get Access
 (1) Remove the access panel 148FB on the right side from the belly fairing (Ref. TASK 53-35-13-000-001).
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 4. Procedure
_________
 (Ref. Fig. 401/TASK 28-13-43-991-001) Subtask 28-13-43-020-050
 A. Removal of the Drain Mast
 (1) Loosen the nut (8) connecting the APU vent-pipe (1) to the straight union (7).
 NOTE : Make sure that the APU vent-pipe (1) attachment is loose.
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 (2)
 Remove the screws (4) from the drain mast (5). NOTE : The drain mast stays in position because the sealant holds it

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 in its position.

 (3)
 Remove the drain mast (5) from the fuselage.

 (4)
 Remove and discard the O-ring (3) from the center tank vent-pipe (2).

 (5)
 Put blanking plugs on the disconnected line ends.

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 Drain Mast
 Figure 401/TASK 28-13-43-991-001
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 TASK 28-13-43-400-001
 Installation of the Drain Mast
 WARNING : OBEY THE FUEL SAFETY PROCEDURES.
_______
 1. Reason for the Job
__________________
 Self Explanatory
 2. Job Set-up Information
______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific nonmetallic scraper
 No specific Torque Wrench : range 0.20 to 3.60 m.daN

 (2.00 to 26.00 lbf.ft)
 B. Consumable Materials
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
Material No. 04-006 USA MIL-G-6032 TYPE I GREASE, GASOLINE AND OIL RESISTANT (Ref. 20-31-00) Material No. 09-003 C Z-16.115 SEALANT,POLYSULFIDE (USE 09-018) (Ref. 20-31-00)
 Material No. 09-016  USA MIL-PRF-81733D TYPE II CLASS B
 CORROSION INHIBITING FILLET CONSISTENCY
 (Ref. 20-31-00)

R Material No. 11-003 USA ASTM D 740 METHYL-ETHYL-KETONE (Ref. 20-31-00) Material No. 16-003 F ASNB70720 COATING (OBSOLETE USE 16-021) (Ref. 20-31-00)
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 C. Expendable Parts
 -------------------------------------------------------------------------------
FIG.ITEM |DESIGNATION  |IPC-CSN
 -------------------------------------------------------------------------------
3 O-ring 28-13-03 04 -200 3 O-ring 28-13-03 04A-200 6 O-ring 28-22-03 01 -080 6 O-ring 28-22-03 01A-080
R 6 O-ring  28-22-03 01F-080
 D. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE  DESIGNATION
 -------------------------------------------------------------------------------
20-28-00-912-004  Electrical Bonding of Components With Conductive Bolts and Screws and Bonding Straps in the Fuselage and in the Wings (this does not include the tanks)-
28-00-00-910-001 Fuel Safety Procedures
 53-35-13-000-001 Removal of the Belly Fairing Access Panels
　
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