ATA 75 GE90 Flashcards
(10 cards)
In the turbine cooling system, which valve is controlled by EEC? ( B1)
a. HPT ACC valve
b. LPT ACC valve
c. CCC valve
B, C
In the turbine cooling system, which valve uses servo fuel? ( B1)
a. HPT ACC valve
b. LPT ACC valve
c. CCC valve
A
In engine accessory cooloing system, CCC valve is actuated by ( B1)
a. Servo fuel
b. 7th stage air
c. 11th stage air
B
What does EEC control to operate VSV and VBV actuators? ( B1)
a. Solenoids inside the actuators
b. 7th stage air bleed from engine
c. Torque motors inside the HMU
C
What air do Engine Accessory Cooling and Turbine Cooling systems use to cool? ( B1)
a. 7th stage air
b. 11th stage air
c. Fan air
C
What are the positions of CCC valve? ( B1)
a. Close when airplane is at cruise, open at all other times
b. Open when airplane is at cruise, close at all other times
c. Open when airplane is at cruise, modulated at all other times
A
What is the fail-safe position of LPT ACC valve? ( B1)
a. Close
b. Open
c. Previous position
A
The purpose of drain cans in VSV and VBV actuators is to ( B1)
a. Collect servo fuel for sampling
b. Drain servo fuel before removal
c. Help identify which connection has leak
C
VSV actuator moves the stator vanes via ( B1)
a. Bellcrank linkage and unision rings
b. Trosion bar and bellcrank linkage
c. Torsion bar and unision rings
C
VBV actuator moves the VBVs via ( B1)
a. Bellcrank linkage and unision rings
b. Trosion bar and bellcrank linkage
c. Torsion bar and unision rings
A
