(2)
Drain the remaining fuel from the applicable fuel tank(s) (Ref. TASK 28-25-00-650-003).
Subtask 28-12-00-010-050
C. Get Access
(1)
Remove all of the access panels (Ref. TASK 57-27-11-000-001) (Ref. TASK 57-27-11-000-002).
(2)
Safety open the applicable spring-loaded surge-door 540BZ, 640BZ with the HOOK-COVER (RIB2-SURGE DOORS) (98D57004014000).
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Tank Venting System
Figure 601/TASK 28-12-00-991-001
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R Tank Venting System
R Figure 601A/TASK 28-12-00-991-001-A
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(3)
Remove the NACA vent intake (Ref. TASK 28-12-47-000-001).
(4)
Remove the access panels 147AZ, 148AZ (Ref. TASK 57-17-11-000-001).
4. Procedure
_________ R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
(Ref. Fig. 601/TASK 28-12-00-991-001)
**ON A/C 301-399,
(Ref. Fig. 601A/TASK 28-12-00-991-001-A) R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
(Ref. Fig. 602/TASK 28-12-00-991-002)
**ON A/C 301-399,
(Ref. Fig. 602A/TASK 28-12-00-991-002-A) R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
Subtask 28-12-00-210-050
A. Inspection of the Tank Venting System
(1)
Make a visual inspection of the open end of the center-tank vent-pipe at the aircraft centerline. The pipe must not be blocked.
(2)
Make a visual inspection of the open end of the wing-tank vent-inlet-duct located outboard of STA700/RIB2. The pipe must not be blocked.
(3)
Make a visual inspection of the open end of the wing-tank vent-duct and the center-tank vent-pipe. They are installed outboard of STA11664/RIB22. They must not be blocked.
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Tank Venting System
Figure 602/TASK 28-12-00-991-002
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R Tank Venting System
R Figure 602A/TASK 28-12-00-991-002-A
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(4)
Make a visual inspection of:
-
the complete wing-tank vent-duct and the wing-tank vent-inlet-duct
-
the complete center-tank vent-pipe.
There must be no:
-large dents
-cracks
-distortion
-corrosion. Make sure that the ducts and the pipe are correctly sealed along their length.
(5)
Make a visual inspection of the vent pipe outboard of STA8268/RIB15. There must be no:
-large dents
-cracks
-distortion
-corrosion.
(6)
Make a visual inspection of the surge-tank vent-duct outboard of STA12277/RIB23. There must be no:
-large dents
-cracks
-distortion
-corrosion.
(7)
Make a visual inspection of the rubber check valves: - one installed in the center-tank vent-pipe inboard of STA0/RIB1 - one installed in the wing-tank vent-inlet-duct outboard of
STA700/RIB2 - one installed in the vent pipe outboard of STA 8268/RIB15 - one installed at the end of the wing-tank vent-duct inboard of
STA700/RIB2.
Make sure that the valves:
-are not blocked
-will open and close correctly
-
are attached correctly
-
are not damaged
-
are not corroded
-
are closed. Make sure that the front edge of the check valve is horizontal.
(8) Make a visual inspection of the overpressure protectors 46QM(47QM) (Ref. TASK 28-12-41-200-003), 96QM (Ref. TASK 28-12-41-200-002), 102QM(103QM) (Ref. TASK 28-12-41-200-001) and the overpressure protector outlets (Ref. TASK 28-12-46-200-001).
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