B. Fuel Configuration
(1)
Defuel the applicable wing tank (Ref. TASK 28-25-00-650-001).
(2)
Drain the fuel that remains from the applicable wing tank inner cell (Ref. TASK 28-25-00-650-003).
Subtask 28-11-41-010-054
C. Get Access
(1)
Put the access platform in position below the applicable access panel 540AB, 640AB.
(2)
Remove the applicable access panel 540AB, 640AB (Ref. TASK 57-27-11-000-001).
(3)
Open the applicable wing tank surge door 540BZ, 640BZ.
(4)
Install the HOOK-COVER (RIB2-SURGE DOORS) (98D57004014000) on the applicable wing tank surge door.
4. Procedure
_________ R **ON A/C 001-001, 051-052,
(Ref. Fig. 403/TASK 28-11-41-991-003)
1EFF : ALL 1 28-11-41Page 426 1 1 May 01/05 1 1 1CES 1
Water Drain Valve - Inner Cell
Figure 403/TASK 28-11-41-991-003
R 1EFF : 001-001, 051-052, 1 28-11-41Page 427 1 1 May 01/05 1 1 1CES 1 **ON A/C 002-049, 053-061, 101-103, 201-203,
(Ref. Fig. 403A/TASK 28-11-41-991-003-A)
**ON A/C 301-399,
(Ref. Fig. 403B/TASK 28-11-41-991-003-C) R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499, Post SB 28-1077 For A/C 001-049,051-061,101-103,201-203, (Ref. Fig. 403C/TASK 28-11-41-991-003-B) **ON A/C 001-049, 051-061, 101-103, 201-203,
Subtask 28-11-41-020-052
A. Removal of the Water Drain Valve
(1)
Remove the nut (2) from the union (3).
(2)
Carefully move the pipe (1) a small distance away (to let you remove the water drain valve (5)). Seal the end of the pipe with a blanking cap.
(3)
Remove the nuts (6) and the bolts (8).
(4)
Remove the water drain valve (5).
(5)
Remove and discard the O-rings (7) and (9).
(6)
Remove the union (3) from the water drain valve (5).
(7)
Remove and discard the O-ring (4).
(8)
Examine the water drain valve (5) and the adjacent aircraft structure for signs of fuel leakage.
(9)
If signs of fuel leakage are found, examine the applicable landing light assembly for fuel contamination (Ref. TASK 33-42-11-000-001).
1EFF : ALL 1 28-11-41Page 428 1 1 Aug 01/05 1 1 1CES 1
Water Drain Valve - Inner Cell
Figure 403A/TASK 28-11-41-991-003-A
R 1EFF : 002-049, 053-061, 101-103, 201-203, 1 28-11-41Page 429 1 1 May 01/05 1 1 1CES 1
R Water Drain Valve - Wing Tank
R Figure 403B/TASK 28-11-41-991-003-C
R 1EFF : 301-399, 1 28-11-41 Page 430
1 1 May 01/04
1 1
1CES 1
Water Drain Valve - Inner Cell
Figure 403C/TASK 28-11-41-991-003-B
R 1EFF : 001-049, 051-099, 101-149, 151-199, 1 28-11-41Page 431 1201-299, 401-499, 1Aug 01/05 1 1 1CES 1 **ON A/C 301-399,
Subtask 28-11-41-020-052-B
A. Removal of the Water Drain Valve
(1)
Remove the nut (2) from the union (3).
(2)
Carefully move the pipe (1) a small distance away (to let you remove the water drain valve (5)). Seal the end of the pipe with a blanking cap.
(3)
Remove the nuts (6), the bolts (8) and disconnect the bonding lead (10).
(4)
Remove the water drain valve (5).
(5)
Remove and discard the O-rings (7) and (9).
(6)
Remove the union (3) from the water drain valve (5).
(7)
Remove and discard the O-ring (4).
(8)
Examine the water drain valve (5) and the adjacent aircraft structure for signs of fuel leakage.
(9) If signs of fuel leakage are found, examine the applicable landing light assembly for fuel contamination (Ref. TASK 33-42-11-000-001). R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
Post SB 28-1077 For A/C 001-049,051-061,101-103,201-203,
Subtask 28-11-41-020-052-A
A. Removal of the Water Drain Valve
(1)
Remove the nut (2) from the union (3).
(2)
Carefully move the pipe (1) a small distance away (to let you remove the water drain valve (5)). Seal the end of the pipe with a blanking cap.
(3)
Remove the nuts (6), the bolts (8) and disconnect the bonding lead (10).
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