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TMUFCTG01-T03 LEVEL 3
EFFECTIVITY 27-00-00 Page 6
Mar 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 27 FLIGHT CONTROLS
UF94200
EFFECTIVITY Page 298
ALL
SLATS/FLAPS CONTROL - EXTENSION SEQUENCE
TMUFCTG01-P03 LEVEL 3
EFFECTIVITY 27-00-00 Page 7
Mar 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 27 FLIGHT CONTROLS
UF94200
EFFECTIVITY Page 299
ALL
SELF EXAMINATION
What is the Pressure Off Brake controlled by ?
A - One of the two directional valves.
B - The enable solenoid valve.
C - The Linear Variable Differential
Transducer.
Why is the retract solenoid energized during
extension ?
A - To reduce the rate of flap travel.
B - To increase fluid flow to the motor.
C - To lock flaps until next position demand.
TMUFCTG01 LEVEL 3
EFFECTIVITY 27-00-00 Page 8
Mar 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 27 FLIGHT CONTROLS
UF94200
EFFECTIVITY Page 300
ALL
27 - FLIGHT CONTROLS
27-00-00 SLATS/FLAPS ABNORMAL OPERATION
(LOCKING)
CONTENTS:
General
Asymmetry
Runaway
Overspeed
Uncommanded Movement
Failure Monitoring
Self Examination
TMUFCTC02 LEVEL 3
EFFECTIVITY
ALL 27-00-00 Page 1
May 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 27 FLIGHT CONTROLS
UF94200
EFFECTIVITY Page 301
ALL
SLATS/FLAPS ABNORMAL OPERATION (LOCKING)
GENERAL
Here is a brief reminder of the wing tip brake
application logic. Asymmetry, Runaway, Overspeed and
Uncommanded Movement are detected by cross comparison
of Asymmetry Position Pick-off Unit (APPU) and Feedback
Position Pick-off Unit (FPPU) signals.
If any of these failures are detected by a Slat Flap
Control Computer (SFCC) and confirmed by the second
one, the wing tip brakes are applied.
Note that if an SFCC does not operate, the other SFCC
receives a WTB-arm signal automatically.
Thus, if the second SFCC subsequently detects a
failure, a solenoid valve on each WTB is energized.
TMUFCTC02-T01 LEVEL 3
EFFECTIVITY
ALL 27-00-00 Page 2
May 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 27 FLIGHT CONTROLS
UF94200
EFFECTIVITY Page 302
ALL
TMUFCTC02-P01 LEVEL 3
SLATS/FLAPS ABNORMAL OPERATION (LOCKING) - GENERAL
EFFECTIVITY
ALL 27-00-00 Page 3
May 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 27 FLIGHT CONTROLS
UF94200
EFFECTIVITY Page 303
ALL
SLATS/FLAPS ABNORMAL OPERATION (LOCKING)
ASYMMETRY
Asymmetry is defined as a positional difference
between the left hand and right hand Asymmetry PPUs.
Asymmetry is usually due to a broken shaft between
both APPUs.
The Asymmetry threshold is above 5° synchro
positional difference between both APPUs.
RUNAWAY
A Runaway is given as a positional difference between
both Asymmetry PPUs and the Feedback PPU.
Runaway on slats can occur when a component of the
torque shaft drive, common to the LH and RH wings
breaks, leaving the slat system free from the PCU POB.
This results in airloads tending to retract the
surfaces.
Runaway on flaps can only be possible if the power
control unit gear box is broken. Depending on the
broken position, the airload tends to retract or extend
the flaps.
OVERSPEED
An Overspeed is detected when the rotation speed of
the torque shafts measured at the PPUs is too high.
TMUFCTC02-T02 LEVEL 3
EFFECTIVITY
ALL 27-00-00 Page 4
May 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 27 FLIGHT CONTROLS
UF94200
EFFECTIVITY Page 304
ALL
TMUFCTC02-P02 LEVEL 3
SLATS/FLAPS ABNORMAL OPERATION (LOCKING)- ASYMMETRY - RUNAWAY - OVERSPEED
EFFECTIVITY
ALL 27-00-00 Page 5
May 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 27 FLIGHT CONTROLS
UF94200
EFFECTIVITY Page 305
ALL
SLATS/FLAPS ABNORMAL OPERATION (LOCKING)
UNCOMMANDED MOVEMENT
Uncommanded Movement is defined as a movement away
from the selected position by a value which exceeds
the threshold.
TMUFCTC02-T03 LEVEL 3
EFFECTIVITY
ALL 27-00-00 Page 6
May 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 27 FLIGHT CONTROLS
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