Unit Five: Flight Controls

STUDENT GUIDE T-39N/G NATOPS

UNIT FIVE: FLIGHT CONTROLS

REFERENCE: T-39 NATOPS MANUAL

ENABLING OBJECTIVE:

A.1

Locate and operate T-39N/G aircraft systems, given a mission in a T-39 in accordance

with NATOPS.

ENABLING STEP:

A.1.6 Recall the basic description, related and operating limitations of the T-39N/G flight

control systems.

NATOPS FIVE: FLIGHT CONTROLS

A. Mechanical elevators, ailerons, rudder.

1. Gustlock - locks the elevators, ailerons, and rudder. Will also prevent throttle

advancement beyond idle.

B. Trim

1. Pitch (horizontal stabilizer), roll (tab on left aileron), yaw (rudder tab).

2. Controlled by 3-position switch below pilot instrument panel:

a. NORM: 5-position switch on pilot/co-pilot yoke, controls NORMAL pitch/roll

trim, switch on center pedestal controls rudder trim.

b. OFF:

No trim available.

c. ALT:

Trim using alternate trim switches in front of pilot's right knee; used for

runaway trim condition or if normal system fails.

3. Trim indicators on center instrument panel. NORMAL T/O setting: 0 (aileron), 4 UP

(elevator), 0 (rudder).

4. Autopilot will trim for roll or yaw with switch in NORM, ALT, or OFF. Can only

trim in pitch if NORM (ALT HOLD).

5. A/P TRIM FAIL light ON if trim attempted with autopilot coupled.

C. Flaps

1. Electrically controlled and actuated (two actuators).

2. Flaps interconnected by a flexible shaft.

FLIGHT CONTROLS 5-1