V2500 - ATA 78

Question 1

What controls the inhibition relay?

Answer 1

EIU after receiving an on ground signal from the LGCIUs

Question 2

Which actuators have internal locks?

Answer 2

Lower

Question 3

What two valves are included in the hydraulic control unit?

Answer 3

• Isolation control valve
• Directional control valve

Question 4

To which actuators are the LVDTs fitted?

Answer 4

Upper actuators

Question 5

What are the conditions necessary for the independent SOV to be open?

Answer 5

TLA -3° & RA < 10ft

Additionally the other engine cannot be at high forward thrust > 30°

Question 6

What are the conditions necessary for the inhibition relay to be energised?

Answer 6

TLA -3.8° & LGCIU on ground

Question 7

What are the conditions necessary for the HCU hydraulic latches to be unlocked?

Answer 7

TLA -4.3°

Question 8

Where does the ‘REV’ indication appear?

Answer 8

Middle of the EPR dial

Question 9

What is the mounting point for the maintenance isolation handle?

Answer 9

HCU

Question 10

What component which is usually stowed has to be installed on the thrust reversers to complete the deactivation procedure?

Answer 10

Lockout pins, 2 on each side, located on sleeve at 3 & 5 o’clock positions

Question 11

How is it indicated that the lockout pin is installed?

Answer 11

Protrudes