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521WB Lower Leading Edge Access Panel - Slat Station 415.79
521XB Lower Leading Edge Access Panel - Slat Station 435.91
521YB Lower Leading Edge Access Panel - Slat Station 467.98
521ZB Lower Leading Edge Access Panel - Slat Station 488.05
621BB Engine Fuel Spar Valve Access Panel - Slat Station 36.02
621CB Lower Leading Edge Access Panel - Slat Station 53.95
621DB Lower Leading Edge Access Panel - Slat Station 71.38
621EB Defuel Access Panel - Slat Station 95.15
621FB Lower Leading Edge Access Panel - Slat Station 112.52
621GB Refuel Access Panel - Slat Station 143.27
621HB Lower Leading Edge Access Panel - Slat Station 170.21
621JB Lower Leading Edge Access Panel - Slat Station 188.14
621KB Lower Leading Edge Access Panel - Slat Station 216.71
621LB Lower Leading Edge Access Panel - Slat Station 234.59
621MB Lower Leading Edge Access Panel - Slat Station 252.04
621NB Lower Leading Edge Access Panel - Slat Station 270.63
621PB Lower Leading Edge Access Panel - Slat Station 289.18
621QB Lower Leading Edge Access Panel - Slat Station 307.75
621RB Lower Leading Edge Access Panel - Slat Station 337.62
621SB Lower Leading Edge Access Panel - Slat Station 356.15
621TB Lower Leading Edge Access Panel - Slat Station 374.95
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
GUN ALL 27-81-21
Page 415
Jun 10/2007
D633A101-GUN
BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
(Continued)
Number Name/Location
621UB Lower Leading Edge Access Panel - Slat Station 395.64
621VB Lower Leading Edge Access Panel - Slat Station 415.79
621WB Lower Leading Edge Access Panel - Slat Station 435.91
621XB Lower Leading Edge Access Panel - Slat Station 467.98
621YB Lower Leading Edge Access Panel - Slat Station 488.04
621ZB Lower Leading Edge Access Panel - Slat Station 508.31
G. Procedure
SUBTASK 27-81-21-480-002
(1) Install the preload shim assembly, which is part of the kit, SPL-1739, at the forward supports for
the auxiliary tracks [29] (Figure 401) (View B-B):
NOTE: This step is necessary to make sure the leading edge slat is not preloaded against the
fixed leading edge.
(a) Remove the nuts [31] and washers [32] from the clevis [33].
(b) Lift the auxiliary track [29] with the clevis [33] through the auxiliary track support.
(c) Install the preload shim assembly, which is part of the kit, SPL-1739, with the shims [34] on
the clevis [33].
(d) Put the clevis [33] back in its position on the auxiliary track support.
(e) Install the washers [32] and nuts [31] on the clevis [33].
SUBTASK 27-81-21-860-004
(2) Prepare the auxiliary tracks and the detent arm for the installation:
NOTE: If you will install the same slat that you removed, it is recommended that you do these
steps but is not necessary.
(a) Adjust the aft support for the auxiliary tracks [29] (Figure 401) (View C-C).
1) Loosen the jam nut [39].
2) Loosen the nut [37] to loosen the locking bolt [36].
3) Turn the adjusting nut [38] until the dimension A is as specified (Table 401)
Table 401/27-81-21-993-802
Location Dimension A Inches (Millimeters)
Slat 1 and 8 (Outbd) 0.830 (21.08)
Slat 1 and 8 (Inbd) 0.950 (24.13)
Slat 2 and 7 (Outbd) 0.950 (24.13)
Slat 2 and 7 (Inbd) 1.450 (36.83)
Slat 3 and 6 (Outbd) 1.450 (36.83)
Slat 3 and 6 (Inbd) 1.450 (36.83)
Slat 4 and 5 (Outbd) 1.500 (38.10)
Slat 4 and 5 (Inbd) 2.100 (53.34)
4) Tighten the nut [37] on the locking bolt [36].
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
GUN ALL 27-81-21
Page 416
Jun 10/2007
D633A101-GUN
BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
(b) Adjust the preload on the detent arm [35] to zero:
NOTE: It is recommended that you do these steps but it is not necessary.
1) Turn the preload adjustment bolt [30] clockwise to increase preload or
counterclockwise to reduce preload.
2) Adjust the preload on all the detent arms [35] to zero pound.
SUBTASK 27-81-21-640-002
(3) Apply a layer of grease, D00633 to the surfaces of the main tracks [21], auxiliary tracks [29] and
the side guards on the auxiliary arms [28].
SUBTASK 27-81-21-420-001
(4) With the main tracks [21] installed on the leading edge slat assembly [17], install the main tracks
[21] between the roller ribs in the fixed leading edge.
SUBTASK 27-81-21-020-005
(5) If you removed slats No. 2, 3, 4, 5, 6 or 7, connect the thermal anti-icing duct to the slat
assembly [17]. To install the duct, do this task: Wing Anti-Ice Telescoping Duct Seal
Installation, TASK 30-11-31-400-801.
　
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