Specifications

SECTION II MODEL 560
AIRPLANE AND SYSTEMS
Control of the individual thrust reverser is through the reverse thrust lever mounted on each of the
engine throttles. The reversers can only be deployed when the primary throttle levers are in the idle thrust
position and the airplane is on the ground as sensed by that side's respective main gear squat switches.
The reverse thrust lever also controls engine thrust during reverse thrust operation.
In the event of an inadvertent thrust reverser deployment, an automatic throttle retarding device will
bring the throttle to approximately idle thrust depending on the amount of throttle friction that has been
applied. After this device has activated, the throttle lever can be advanced resulting in corresponding
reverse thrust.
WARNING
DO NOT ATTEMPT TO OVERRIDE THE RETRACTION MECHANISM
OR ADVANCE THE THROTTLE AFTER RETRACTION. THIS COULD
RESULT IN A DANGEROUS ASYMMETRICAL THRUST CONDITION.
Figure 2-4. Throttles with Reverse Thrust Levers
WARNING
SHOULD AN INADVERTENT THRUST REVERSER DEPLOYMENT
OCCUR, THE PILOT MUST ENSURE THAT THE THROTTLE LEVER IS IN
THE IDLE POSITION.
Moving the reverse thrust lever from the STOWED to the IDLE REVERSE position actuates the deploy
cycle. This electrically opens the isolation valve, moves the reverser control to deploy and pressurizes the
airplane hydraulic system. The isolation valve allows the airplane hydraulic system to pressurize the
thrust reverser system. The amber ARM light indicates hydraulic pressure to the reverser control valve as
sensed by a pressure switch.
2-8 Configuration AA 56OMB-01