Flrs and ARS system

The Airbus A330's FLAPS lever has 5 positions: 0, 1, 2, 3, and FULL. Two configurations correspond to FLAPS lever position 1: CONF 1 or CONF 1 + F. CONF 1 + F automatically retracts the flaps to 0 at 200 knots. This helps prevent excessive stress on the flaps during high speeds or during takeoff and landing.

The Flap Load Relief System (FLRS) retracts the flaps automatically in CONF 2, 3, or FULL, making it safer for the aircraft in high-speed situations. This retraction occurs when the aircraft exceeds the maximum flap extension speed (VFE) by a small margin, preventing potential damage.

When the FLRS activates, the ECAM (Electronic Centralized Aircraft Monitor) displays the flashing "RELIEF" message. If the pilot exceeds the VFE by 4 knots for the current flap configuration, the ECAM will show an overspeed warning.

CONF 1* (20° slats/8° flaps) can be obtained only through FLRS activation in CONF 2, while CONF 2* (23° slats/14° flaps) can be obtained only through FLRS activation in CONF 3. These configurations are not directly selectable on the FLAPS lever.

The VFE value displayed on the PFD (Primary Flight Display) will change depending on the flap setting and the activation of the FLRS. For example, in approach with FLAPS 2 selected, the VFE displayed will be either CONF 2 or CONF 1* depending on whether the FLRS is activated.

Auto retraction of the flaps only occurs when exceeding the maximum flap extension speed (VFE) by 2.5 knots. If the speed falls below VFE by 2.5 knots, flaps return to their selected position.

CONF 1* (20° slats/8° flaps) is achieved through FLRS activation in CONF 2. CONF 2* (23° slats/14° flaps) is achieved through FLRS activation in CONF 3.

The Flap Load Relief System (FLRS) automatically retracts flaps in CONF 2, 3, or FULL when the aircraft exceeds VFE. This prevents excessive stress on the flaps at higher speeds.

The VFE value displayed on the PFD will change depending on the flap setting and whether FLRS is activated. For example, in approach with FLAPS 2 selected, the VFE displayed will be either CONF 2 or CONF 1* depending on FLRS activation.

The maximum flap extension speed (VFE) is the highest speed at which a certain flap configuration can be used without exceeding stress limits on the flaps. It's a vital safety factor in aviation.

This function prevents slats retraction at high angle-of-attack (alpha) or low speed to ensure safe flight conditions.

The slats retract automatically to position 0 when alpha drops below 7.6° and speed exceeds 154 kt.

If alpha exceeds 8.5° or speed falls below 148 kt after the lever is set to 0, the SLATS Alpha/Speed Lock function remains inactive.

SFCCs transmit flap/slat positions to various systems including PRIM/SEC, FMGEC, ADIRU, EIU, CIDS, and GPWS.

The SFCCs use corrected alpha or airspeed data from the ADIRUs to determine when to inhibit slat retraction.

CONF 1 + F (16/8) configuration automatically retracts flaps at 200 knots during takeoff or go-around, helping to reduce stress on the flaps at higher speeds.

CONF 1 + F (16/8) configuration is available only if the aircraft speed is below 100 knots or if CONF 2 or a higher flap configuration has been selected previously.

The FLAPS lever has five positions: 0, 1, 2, 3, and FULL. However, you cannot select an intermediate position between these.

If the speed is less than 200 knots, CONF 1 + F (16/8) is selected when FLAPS lever is set to position 1.

Balks are included in the FLAPS lever positions 1 and 3 to prevent excessive flap/slat movement with just one pilot action.