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gearbox. The motors driven by the related channel, are supplied by blue and green hydraulic
power for the slats, and green and yellow for the flaps.
Pressure-Off Brakes (POB) are installed to lock the transmission when the flaps or slats surfaces
have reached the selected position, or in case of hydraulic power failure.
‐ 7 Slats and 2 Flaps surfaces per wing.
‐ Two Asymmetry Position Pick-Off Units (APPU) measure the asymmetry between the left and right
wings.
‐ A flap disconnect detection system, which detects attachment failure and inhibits flap operation in
order to limit further damage. The failure is detected by a sensor measuring excessive differential
movement between the inner and outer flaps.
‐ Wing tip brakes (WTB), activated in case of asymmetry, overspeed, or symmetrical runaway. They
cannot be released in flight. They are supplied by blue and green hydraulic power for the slats,
and by green and yellow for the flaps.
‐ The Feedback Position Pick-Off Units (FPPU) provide position feedback to the SFCCs.
‐ The Instrumentation Position Pick-Off Unit (IPPU) provide position data to the ECAM.
Note: If the flap wing tip brakes are activated, slat operation is still possible and vice versa.
If one SFCC is inoperative, both slats and flaps will operate at half speed.
If one hydraulic system is inoperative, the corresponding surfaces (slats or flaps) operate at
half speed.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
FLIGHT CONTROLS
FLAPS AND SLATS - DESCRIPTION
A330/A340 FLEET DSC-27-30-10 P 2/8
FCOM 19 AUG 10
ARCHITECTURE
Applicable to: ALL
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
FLIGHT CONTROLS
FLAPS AND SLATS - DESCRIPTION
A330/A340 FLEET DSC-27-30-10 P 3/8
FCOM 19 AUG 10
CONFIGURATIONS
Applicable to: ALL
The FLAPS lever has 5 positions: 0, 1, 2, 3 and FULL.
Two configurations correspond to the FLAPS lever position 1 : CONF 1 or CONF 1 + F.
The selection is done as explained in the following paragraphs.
AUTOMATIC RETRACTION SYSTEM (ARS)
Applicable to: ALL
When CONF 1 + F is selected, the auto retraction of flaps to 0 occurs at 200 kt (before VFE, which is
215 kt).
FLAP LOAD RELIEF SYSTEM (FLRS)
Applicable to:
Only available in CONF 2, 3, or FULL. When activated, the system retracts the flaps to the deflection
corresponding to the next retracted lever position.
Auto retraction of the flaps only occurs in case of VFE exceedance (VFE +2.5 kt).
If speed is reduced below VFE (VFE -2.5 kt), flaps return to their normal (selected) position.
In CONF 2, auto retraction results in CONF 1* (24 ° slats/17 ° flaps), which can only be obtained only
by FLRS activation.
Note: 1. When FLAPS 1 is selected, VFE of CONF 1 or CONF 1 + F is displayed, depending on
the actual configuration. In approach, VFE next is 205 kt (VFE of CONF 1*).
2. When FLAPS 2 is selected in approach, VFE of CONF 2 or CONF 1* is displayed,
depending on the FLRS activation.
In case of FLRS activation, the ECAM upper display shows a flashing “RELIEF” message.
If the speed is increased by 4 kt above the VFE, corresponding to the actual flap/slat configuration,
an overspeed warning appears on the ECAM.
FLAP LOAD RELIEF SYSTEM (FLRS)
Applicable to: ,
Only available in CONF 2, 3, or FULL. When activated, the system retracts the flaps to the deflection
corresponding to the next retracted lever position.
Auto retraction of the flaps only occurs in case of VFE exceedance (VFE +2.5 kt).
If speed is reduced below VFE (VFE -2.5 kt), flaps return to their normal (selected) position.
In CONF 2, auto retraction results in CONF 1* (20 ° slats/8 ° flaps).
In CONF 3, auto retraction results in CONF 2* (23 ° slats/14 ° flaps).
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
FLIGHT CONTROLS
FLAPS AND SLATS - DESCRIPTION
A330/A340 FLEET DSC-27-30-10 P 4/8
FCOM 19 AUG 10
These configurations can be obtained only by FLRS activation.
Note: 1. When FLAPS 1 is selected, VFE of CONF 1 or CONF 1 + F is displayed, depending on
the actual configuration. In approach, VFE next is 205 kt (VFE of CONF 1*).
2. When FLAPS 2 is selected in approach, VFE of CONF 2 or CONF 1* is displayed,
depending on the FLRS activation.
3. When FLAPS 3 is selected, only VFE of CONF 3 is displayed on PFD independently of
FLRS activation.
In case of FLRS activation, the ECAM upper display shows a flashing “RELIEF” message.
If the speed is increased by 4 kt above the VFE, corresponding to the actual flap/slat configuration,
an overspeed warning appears on the ECAM.
　
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