Honda HondaJet HA-420 Pilots Operating Manual page 128

Honda Aircraft Company
HA-420 SYSTEMS
POM DESCRIPTION
Speed Brake
A hydraulically actuated, dual-panel speed brake is installed in the
tailcone.
Figure 1-60. Speed Brake
The single position speed brake system is designed to "blow back" as
speed increases to provide constant drag independent of speed. Speed
brake deployment is commanded by moving the SPEED BRAKE switch
aft to the EXT position where it will latch in place. To retract speed
brakes, move the lever back to the RET position. Speed brakes are also
automatically retracted if either thrust lever is advanced beyond a
position close to the MCT detent. A switch in the actuator determines
when the speed brake is fully retracted.
HJ1-29000-005-001
October 30, 2016 1-112
FOR TRAINING PURPOSES ONLY