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There is one torque tube support between the two outboard flap
transmissions on each wing. To get access, go through
removable access panels under the wings or extend the TE
flaps.
Torque Tubes
There are two types of torque tubes. The torque tubes that
connect the flap PDU to the flap transmissions 4 and 5 are steel
tubes that are bolted to steel end fittings. All the other torque
tubes are aluminum tubes that are magneformed to steel end
fittings.
The magneforming process forms the ends of the torque tubes
around the end fittings electro-magnetically. The torque tubes
are magneformed instead of riveted to help prevent
disconnects.
Torque Tube Supports
The torque tube supports have these parts:
* Coupling
* Torque tube cover
* Aluminum tube.
The coupling moves the aluminum tube. The aluminum tube is
inside the torque tube cover.
The torque tube support is one line replaceable unit (LRU).
The torque tube supports have grease fittings for lubrication.
Training Information Point
If a magneformed torque tube fails, you cannot rivet new end
fittings onto it. But the torque tube can be repaired using
published procedures. You can also replace a damaged torque
tube with a riveted torque tube of the same length.
When you connect torque tubes, obey this caution:
TE FLAP SYSTEM - TORQUE TUBES AND TORQUE TUBE SUPPORTS
EFFECTIVITY
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CAUTION: MAKE SURE YOU INSTALL LOCKWIRE ON THE
COUPLING SCREWS. IF THE COUPLING SCREWS
COME OFF, THE TORQUE TUBE COUPLING WILL
DISCONNECT AND CAUSE DAMAGE TO THE
AIRPLANE.
TE FLAP SYSTEM - TORQUE TUBES AND TORQUE TUBE SUPPORTS
EFFECTIVITY
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BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
27-51-00-013
TE FLAP SYSTEM - TORQUE TUBES AND TORQUE TUBE SUPPORTS
TE FLAP SYSTEM - TORQUE TUBES AND TORQUE TUBE SUPPORTS
EFFECTIVITY
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D633A101-GUN Oct 10/2005
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
27-51-00-013
Purpose
The angle gearboxes connect torque tubes that are at different
angles to each other.
Location
There are six angle gearboxes, three on each wing. These are
the angle gearboxes:
* Tee angle gearbox (2)
* MLG beam angle gearbox (2)
* Seal rib angle gearbox (2).
To get access to the tee angle gearboxes, go through the MLG
wheel well. To get access to the other angle gearboxes, extend
the TE flaps.
Physical Description
The angle gearboxes contain grease .
TE FLAP SYSTEM - ANGLE GEARBOXES
EFFECTIVITY
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D633A101-GUN Oct 10/2005
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
27-51-00-027
TE FLAP SYSTEM - ANGLE GEARBOXES
TE FLAP SYSTEM - ANGLE GEARBOXES
EFFECTIVITY
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D633A101-GUN Oct 10/2005
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
27-51-00-027
Purpose
Each TE flap transmission transmits the power from the torque
tubes to the universal joint and ballscrew. When the ballscrew
moves, the gimbal moves. This causes the TE flap to move.
Location
There are eight TE flap transmissions, two transmissions for
each TE flap. There is one ballscrew and gimbal for each
transmission. The transmissions are on the rear spar of the
wing. Access to the transmissions, ballscrews, and gimbals is
through the TE flap fairings or through the MLG wheel well.
Transmissions
Each transmission has a torque brake that prevents excessive
loads on the ballscrew if the flap does not move freely. The
torque brake is a ball ramp type brake with a torque trip
indicator. If the TE flap does not move freely, the torque brake
stops the movement of the torque tubes. This causes the
hydraulic motor to stall. The torque brake operates in either
direction of flap movement. The trip indicator must be manually
reset if it activates.
Each transmission also has two no-back brakes. The no-back
brakes are skewed-roller type brakes. They prevent TE flaps
retraction and extension if a torque tube breaks or because of
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