(a)
Install the check valve (3) in the check valve housing (4).
(b)
Install the three bolts (1) and the washers (2).
(c)
Safety the bolts (1), as shown, with MISCELLANEOUS (Material No. 19-010).
(d)
Manually operate the check valve (3) to make sure it opens and closes correctly.
(4)
Make sure that the work area is clean and clear of tool(s) and other items.
(5)
Make sure that all of the bonding straps are correctly installed and attached (Ref. TASK 20-28-00-912-002), before you install the access panel(s).
(6)
If applicable, install the access panel 131NW.
(7)
If applicable, install the floor panel 241AF (Ref. TASK 53-32-12-400-002).
(8)
If applicable, close the forward cargo-compartment door (Ref. TASK 52-30-00-860-002).
R 1EFF : 062-099, 104-149, 151-199, 204-299, 1 28-13-00Page 512 1301-399, 401-499, 1Aug 01/05 1 1 1CES 1 **ON A/C ALL
Subtask 28-13-00-942-057 R B. Removal of Equipment
(1)
Remove the safety barriers.
(2)
Remove the warning notice(s).
(3)
Remove the access platform(s).
(4)
Remove the ground support and maintenance equipment, the special and standard tools and all other items.
1EFF : ALL 1 28-13-00Page 513 1 1 May 01/04 1 1 1CES 1 WING CENTER TANK EXTERNAL VENTILATING SYSTEM - INSPECTION/CHECK
_______________________________________________________________
TASK 28-13-00-200-001
Check Drain Mast Outlet for Obstruction
WARNING : PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU
_______
START A TASK ON OR NEAR:
-
THE FLIGHT CONTROLS
-
THE FLIGHT CONTROL SURFACES
-
THE LANDING GEAR AND THE RELATED DOORS
-COMPONENTS THAT MOVE. WARNING : MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING
_______
GEAR.
1.
Reason for the Job
__________________
Refer to the MPD TASK: 281343-01
2.
Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------
REFERENCE QTY DESIGNATION
-------------------------------------------------------------------------------
No specific safety barriers
B. Referenced Information
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
R 28-13-42-200-001 Visual Inspection of the Vapor Seal 28-13-43-000-001 Removal of the Drain Mast (for corrective action) 28-13-43-400-001 Installation of the Drain Mast (for corrective
action)
28-13-00-991-002 Fig. 601
1EFF : ALL 1 28-13-00Page 601 1 1 May 01/05 1 1 1CES 1 1EFF : ALL 1 28-13-00Page 602 1 1 May 01/05 1 1 1CES 1
3. Job Set-up__________
Subtask 28-13-00-941-056
A. Safety Precautions
(1) Put the safety barriers in position.
4. Procedure_________
(Ref. Fig. 601/TASK 28-13-00-991-002)
Subtask 28-13-00-210-051
A. Inspection of the Drain Mast for Obstruction
R R (1) Make sure that the drain mast openings are not blocked. Remove any blockages from the drain mast openings.
(2) Examine the drain mast for damage, cracks, corrosion and correct attachment.
R R R R NOTE : If the drain mast is damaged, the vapour seal must also be____ inspected (Ref. TASK 28-13-42-200-001). If the drain mast becomes blocked, the center tank vent system can become pressurized. This can cause damage to the vapour seal.
(3) If necessary, replace the drain mast (Ref. TASK 28-13-43-000-001) and (Ref. TASK 28-13-43-400-001).
5. Close-up________
Subtask 28-13-00-942-051
A. Removal of Equipment
(1) Make sure that the work area is clean and clear of tool(s) and other items.
(2) Remove the safety barriers.
(3) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
Drain Mast Inspection
Figure 601/TASK 28-13-00-991-002
1EFF : ALL 1 28-13-00 Page 603
1 1 Feb 01/98
1 1
1CES 1
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