Speedbrake

STUDENT GUIDE T-39N/G NATOPS

G. Speedbrake

1. Electrically controlled. Hydraulically actuated.

2. Switch on left throttle.

3. Single panel on bottom of A/C.

4. No airspeed limit; 3g-max.

5. DUMP switch - if hydraulics fail and speedbrake switch OFF, will relieve pressure

holding the brake out and allow it to trail. Can be reset for normal operation.

6. Do not roll over arresting gear with SB out ( DUMP switch in DUMP position).

7. Speedbrake does have intermediate positions.

8. SPEEDBRAKE OPEN light if either throttle > 95% rpm; speedbrake will NOT close

automatically with throttle advancement.

H. Thrust reverser review (Thrust reverser accumulator 900 + 50 psi)

4-4 HYDRAULIC SYSTEMS