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airloads.
Each transmission contains oil and weighs approximately 45 lb
(20 kg).
Ballscrews
The transmission turns the ballscrew through the universal
joint. The ballscrew has a ballscrew nut which connects to the
gimbal. As the ballscrew turns, the ballscrew nut moves the
gimbal.
The ballscrew has stops at both ends. The ballscrew nut does
not touch the stops during the usual operation of the TE flaps.
The ballscrew nut is lubricated with grease.
Gimbal
The gimbal moves the TE flap surface. The gimbal connects to
the ballscrew nut and moves as the ballscrew turns.
TE FLAP SYSTEM - FLAP TRANSMISSIONS, BALLSCREWS, AND GIMBALS
EFFECTIVITY
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TE FLAP SYSTEM - FLAP TRANSMISSIONS, BALLSCREWS, AND GIMBALS
TE FLAP SYSTEM - FLAP TRANSMISSIONS, BALLSCREWS, AND GIMBALS
EFFECTIVITY
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Purpose
Each flap drive mechanism transmits power from the
transmission, ballscrew, and gimbal to move the TE flap. The
flap fairings cover the drive mechanisms and reduce
aerodynamic drag.
Location
There are two drive mechanisms for each TE flap. There are
three flap fairings on the bottom of each wing.
Two of the flap drive mechanisms are in the MLG wheel well. To
get access to the flap drive mechanisms on the wings, extend
the TE flaps or remove the flap fairings.
Flap Drive Mechanisms
During extension, the ballscrew moves the carriage along the
main flap track. The rollers in the carriage stay in the main flap
track. These are the components that connect to the carriage
and move as the carriage moves:
* Gimbal
* Main flap
* Aft flap pushrods (outboard flaps only)
* Flap fairing links (outboard flaps only)
* Flap skew sensor control rod.
There is only a small difference in the flap drive mechanisms for
the inboard flaps.
The aft flap pushrods move the aft flap. The outboard flaps have
4 aft flap tracks to help support the aft flap. The inboard flaps
have 2 aft flap tracks.
The flap fairing links move the flap fairing. The flap skew sensor
control rod moves the flap skew sensor input shaft.
Flap Fairings
The flap fairings are aluminum frames with graphite reinforced
kevlar skins. The fairings have these three sections:
* Forward section
* Aft section
* Tailcone.
The forward section attaches to the bottom of the wing. The aft
section turns about a pivot bolt and is controlled by the fairing
links. The tailcone attaches to the aft section.
Training Information Point
There is an access panel on some of the flap fairings to help
you remove the fairing.
TE FLAP SYSTEM - FLAP DRIVE MECHANISMS AND FAIRINGS
EFFECTIVITY
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BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
27-51-00-015
TE FLAP SYSTEM - FLAP DRIVE MECHANISMS AND FAIRINGS
TE FLAP SYSTEM - FLAP DRIVE MECHANISMS AND FAIRINGS
EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
27-51-00-015
Purpose
The inboard and outboard flaps increase the wing area and the
wing camber. This helps improve the airplane performance
during takeoff and landing.
Location
The inboard and outboard flaps are on the trailing edge of the
wings.
Physical Description
The flaps have aluminum stiffeners and aluminum skins. The
trailing edge wedge of the main flap is fiberglass skin bonded to
a core of Nomex honeycomb.
The dimensions of the inboard main flap are approximately 127
inches by 44 inches (3.2 m by 1.1 m). The dimensions of the
inboard aft flap are approximately 84 inches by 20 inches (2.1 m
by 0.5 m). The dimensions of the outboard main flap are
approximately 223 inches by 43 inches (5.7 m by 1.1 m). The
dimensions of the outboard aft flap are approximately 191
inches by 19 inches (4.9 m by 0.5 m).
The inboard main and aft flaps weigh approximately 270 lb (123
kg). The outboard main and aft flaps weigh approximately 300 lb
(136 kg).
Functional Description
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