T-45C TS, ADV & IUT ENG-14
Flight Control System Malfunctions
PRESENTATION
I.
Split flaps/slats 1.8.1.6.13.1, 1.8.1.6.14.1
Fig 1: Flap System
Operation
A. Indications:
1. Aircraft rolls and yaws after flaps are lowered or raised
2. FLAPS/SLATS lever and FLAP position indicator may not match or
Fig 2: Slat System
SLATS caution light illuminated
Operation
B. Verifications: roll stops when FLAPS/SLATS lever is returned to
previous setting
C. Effects on flight safety: split flaps/slats cause a serious control problem
II. Runaway stabilator trim (up or down) 1.8.1.6.5.1
Fig 3: Stabilator
A. Indications
Trim Operation
1. Aircraft pitches up/down without control stick input by pilot
2. Increasing noseup/nosedown stick forces
3. Aircraft does not respond to stabilator trim inputs
B. Verifications: verifications same as indications
C. Effects on flight safety
1. Runaway stabilator control results in controllable stick forces;
however, flight conditions will dictate severity of problem
2. Sustained stick pressure required to maintain control may cause
pilot fatigue
III. Speed brake failure 1.8.1.6.8.1
Fig 4: Speed Brake
A. Stuck open
Operation
1. Indications
a. Lack of aircraft acceleration upon application of power
b. Excessive power required to maintain airspeed
c.
Continued vibration/airframe buffeting
Original (9-98)
Page 14-3
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