Flaps and Slats (Contd.)
Mechanical gates hinder inadvertent FLAP lever movement beyond flaps 1 for
one engine inoperative go–around and flaps 15 for normal go–around.
Indicator lights on the center instrument panel provide overall LE devices position
status. The LE DEVICES annunciator panel on the aft overhead panel indicates
the positions of the individual flaps and slats.
Flap Load Relief
The flaps/slat electronics unit (FSEU) provides a TE flap load relief function
which protects the flaps from excessive air loads. This function is operative at the
flaps 30 and flaps 40 positions only. The FLAP lever does not move, but the flap
position indicator displays flap retraction and re–extension.
When the flaps are set at 40, the TE flaps: (700/800/900)
When the flaps are set at 30, the TE flaps: (700/800/900)
Option
The FLAP LOAD RELIEF light illuminates when the TE flap load relief function
is activated.
Mechanical gates hinder inadvertent FLAP lever movement beyond flaps 1 for
one engine inoperative go–around and flaps 15 for normal go–around.
Indicator lights on the center instrument panel provide overall LE devices position
status. The LE DEVICES annunciator panel on the aft overhead panel indicates
the positions of the individual flaps and slats.
Flap Load Relief
The flaps/slat electronics unit (FSEU) provides a TE flap load relief function
which protects the flaps from excessive air loads. This function is operative at the
flaps 30 and flaps 40 positions only. The FLAP lever does not move, but the flap
position indicator displays flap retraction and re–extension.
When the flaps are set at 40, the TE flaps: (700/800/900)
- Retract to 30 if airspeed exceeds 163 knots.
- Re–extend when airspeed is reduced to approximately 157 knots or below.
When the flaps are set at 30, the TE flaps: (700/800/900)
- Retract to 25 if the airspeed exceeds 176 knots.
- Re–extend when airspeed is reduced to approximately 170 knots or below .
Option
The FLAP LOAD RELIEF light illuminates when the TE flap load relief function
is activated.
