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A fail-safe hook retains the flap on the track in the
event of structural failure of the carriage.
TMUFCBG02-T02 LEVEL 3
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FLAPS DRIVE STATION D/O - FLAP DRIVES
TMUFCBG02-P02 LEVEL 3
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FLAPS DRIVE STATION D/O
FLAP AND TRACK FAIRINGS
A flap link arm is attached to the flap bottom surface
immediately outboard of each track position.
The forward end of each link arm is bolted to the drive
lever on its associated actuator.
At tracks 2, 3 and 4 a track fairing operating arm is
attached to the flap bottom surface.
The operating arm is connected to a linkage which
operates the moveable track fairing during flap
extension and retraction.
The link arms transmit the drive from the rotary
actuators directly to the flap surface.
TMUFCBG02-T03 LEVEL 3
EFFECTIVITY 27-54-00 Page 6
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MECHANICS / ELECTRICS & AVIONICS COURSE 27 FLIGHT CONTROLS
UF94200
EFFECTIVITY Page 342
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TMUFCBG02-P03 LEVEL 3
FLAPS DRIVE STATION D/O - FLAP AND TRACK FAIRINGS
EFFECTIVITY 27-54-00 Page 7
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UF94200
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SELF EXAMINATION
How many rollers are there on carriages at tracks
2, 3 and 4?
A - Six vertical-load and four side-load
rollers.
B - Four vertical-load and two side-load
rollers.
C - two vertical-load and four side-load
rollers.
TMUFCBG02 LEVEL 3
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27 - FLIGHT CONTROLS
27-51-00 FLAPS ATTACHMENT FAILURE
DETECTION PRINCIPLE
CONTENTS:
Sensors
Landing Gear Control and Interface Units (LGCIUs)
Slat Flap Control Computers (SFCCs)
Self Examination
TMUFCTJ02 LEVEL 3
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FLAPS ATTACHMENT FAILURE DETECTION PRINCIPLE
SENSORS
Two flap disconnect sensors are fitted on the
interconnecting strut between inner and outer flaps
on each wing.
The flap disconnect sensors, which are proximity
sensors, detect any flap disconnection.
LANDING GEAR CONTROL and INTERFACE UNITS (LGCIUs)
Each Landing Gear Control Interface Unit (LGCIU)
receives signals from two sensors and transmits this
data to its related Slat/Flap Control Computer.
The LGCIUs are used to process signals from proximity
sensors.
SLAT FLAP CONTROL COMPUTERS (SFCCs)
Thanks to the computer cross talk, each Slat Flap
Control Computer (SFCC) monitors any flap
disconnection.
If an attachment failure has been detected by both
SFCCs, both valve block solenoids on the Power Control
Unit (PCU) are de-energized and the system is stopped
by the Pressure Off Brakes.
In this case, the Wing Tip Brakes are not applied.
TMUFCTJ02-T01 LEVEL 3
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FLAPS ATTACHMENT FAILURE DETECTION PRINCIPLE
TMUFCTJ02-P01 LEVEL 3
EFFECTIVITY 27-51-00 Page 3
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SELF EXAMINATION
Which computers monitor the flap disconnection data?
A - The SFCCs which pass the information to
the LGCIUs.
B - The LGCIUs which transmit the
information to the SFCCs.
C - The LGCIUs only.
From which sensors does each LGCIU receive
information ?
A - All four disconnect sensors.
B - One sensor on each wing.
C - Two sensors on one wing.
TMUFCTJ02 LEVEL 3
EFFECTIVITY 27-51-00 Page 4
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_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 27 FLIGHT CONTROLS
　
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