Ground Operation
During landing, the auto speed brake system operates when these conditions
occur:
Compression of the right main landing gear strut enables the ground spoilers to
deploy.
The SPEED BRAKE lever automatically moves to the UP position and the
spoilers deploy.
If a wheel spin-up signal is not detected, when the air/ground system senses
ground mode (any gear strut compresses) the SPEED BRAKE lever moves to the
UP position and flight spoiler panels deploy automatically. When the right main
landing gear strut compresses, a mechanical linkage opens the ground spoiler
bypass valve and the ground spoilers deploy.
During landing, the auto speed brake system operates when these conditions
occur:
- SPEED BRAKE lever is in the ARMED position.
- SPEED BRAKE ARMED light is illuminated.
- Radio altitude is less than 10 feet.
- Landing gear strut compresses on touchdown.
Compression of the right main landing gear strut enables the ground spoilers to
deploy.
- Both thrust levers are retarded to IDLE.
- Main landing gear wheels spin up (more than 60 kts).
The SPEED BRAKE lever automatically moves to the UP position and the
spoilers deploy.
If a wheel spin-up signal is not detected, when the air/ground system senses
ground mode (any gear strut compresses) the SPEED BRAKE lever moves to the
UP position and flight spoiler panels deploy automatically. When the right main
landing gear strut compresses, a mechanical linkage opens the ground spoiler
bypass valve and the ground spoilers deploy.
