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GUN 001-099, 101-122, 156, 157, 201-999
SUBTASK 27-09-71-800-009
(6) Make a shim for the bullnose seal [107]:
(a) Trace the outline of the bullnose seal [107] on the shim material.
NOTE: The material for the shim is optional. Any normal shim material is acceptable,
including non-metallic materials such as nylon.
(b) Cut out the shim material.
NOTE: Make sure the shim matches the shape of the bullnose seal [107] in the limit of
+0.0/-0.1 inch.
(c) Drill holes in the shim material to match the holes in the bullnose seal [107].
GUN 155
SUBTASK 27-09-71-800-012
(7) Make a shim for the bullnose seal [107]:
(a) Match the shim to the same shape as the raised area on the back of the seal plate
(Figure 507).
NOTE: The material for the shim is optional. Any normal shim material is acceptable,
including non-metallic materials such as nylon.
(b) Cut out the shim material.
(c) Drill holes in the shim material to match the holes in the bullnose seal [107].
GUN ALL
SUBTASK 27-09-71-420-003
(8) Install the bullnose seal [107] and the new shim:
(a) If the shim material is metallic, apply a layer of sealant, A00247 between the shim and the
inboard flap [71].
(b) Put the bullnose seal [107] and the shim in their position on the inboard flap [71].
(c) Install the bolts [108] and the washers [109] to attach the bullnose seal [107].
NOTE: Make sure the grip length of the bolts [108] is correct with the additional thickness
due to the shims.
(d) Release the torque tube door [94], and allow it to close.
SUBTASK 27-09-71-940-006
(9) Put the airplane back to its usual condition:
(a) Do this task: Trailing Edge Flap System Reactivation, TASK 27-51-00-440-801.
(b) Retract the flaps to the retracted position, do this task: Retract the Trailing Edge Flaps,
TASK 27-51-00-860-804.
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
GUN ALL 27-09-71
Page 516
Oct 10/2007
D633A101-GUN
BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
L. Lateral Trim Correction with a Formed in Place Gasket (FIPG)
GUN 001-099, 101-122, 156, 157, 201-999
NOTE: Use these steps if the aileron trim necessary to keep level flight is not in the limit for the
flaps extended to 40-units condition, or the change in the trim between the 15-unit and 40-
unit conditions is not in the limit and the other adjustments have not been effective. This
installs, or removes a Formed in Place Gasket (FIPG) on the torque tube door adjacent to
the wing to body panels. The FIPG stops airflow from the wheel well to the upper flap
surface.
SUBTASK 27-09-71-970-011
(1) Find the appropriate location to add or remove a Formed in Place Gasket (FIPG):
NOTE: The FIPG only has an affect on the lateral trim when it is installed on one side only.
(a) Determine whether the aircraft already has a FIPG installed on neither, one or both sides:
NOTE: The FIPG is a seal made of sealant, A00247 between the torque tube door [94],
and the fixed upper panel [103].
GUN 201-203
1) The FIPG was initially installed on neither side of the aircraft, one may have been
subsequently installed.
GUN 001-099, 101-122, 156, 157, 201-999
2) Manually open the torque tube door [94].
3) Look at the torque tube door [94] and the fixed upper panel [103] to determine if a FIPG
is there.
(b) Flight test condition; Right Trim at the 40-unit flap condition:
NOTE: Right aileron trim indicates a left wing heavy condition.
1) There should be an FIPG installed on the left side only.
a) If there are two FIPG’s installed, remove the FIPG from the right side.
b) If there are no FIPG’s installed, install an FIPG on the left side.
(c) Flight test condition; Left Trim at the 40-unit flap condition:
NOTE: Left aileron trim indicates a right wing heavy condition.
1) There should be an FIPG installed on the right side only.
a) If there are two FIPG’s installed, remove the FIPG from the left side.
b) If there are no FIPG’s installed, install an FIPG on the right side.
SUBTASK 27-09-71-480-003
WARNING: MAKE SURE THE DOWNLOCK PINS ARE INSTALLED ON ALL THE LANDING GEAR.
WITHOUT THE DOWNLOCK PINS, THE LANDING GEAR CAN RETRACT AND CAUSE
INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT.
(2) If the downlock pins are not installed in the nose and main landing gear, do this task: Landing
Gear Downlock Pins Installation, TASK 32-00-01-480-801.
SUBTASK 27-09-71-860-013
(3) Extend the trailing edge flaps to the 30-unit position. To extend them, do this task: Extend the
Trailing Edge Flaps, TASK 27-51-00-860-803.
NOTE: It will be necessary to manually open the torque tube door [94].
　
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