ATA 78 Flashcards
Which statement is true
a Thrust reverser actuation system uses hydraulic power for operation and electrical power for control
b Thrust reverser actuation systemuses electrical power for operation and electrical power for control
c Thrust reverser actuation systemuses pneumatic power for operation and electrical power for control
A
Solenoids of which thrust reverser control valve are enegized by switches on control stand
a Synlock solenoid valve and directional control valve
b Synlock solenoid valve and isolation valve
c Directional control valve and isolation valve
B
Which valve is control by EEC
a Synlock solenoid valve
b Directional control valve
c Isolation valve
C
Which component does EEC use to monitor thrust reverser sleeves position for controling thrust reverser interlock actuator and scheduling thrust
a Proximity sensors
b RVDT
c LVDT
B
Where is located thrust reverser maintenance switch
a On engine oil tank
b On right side of inlet cowl bulkhead
c On left side of inlet cowl bulkhead
B*
When does EEC energizes the throttle lever interlock actuator during thrust reverser deployment
a Both sleeves are extended more than 60%
b Both sleeves are extended more than 50%
c Both sleeves are extended more than 40%
A
When does REV on upper EICAS display change from amber to green
a Both sleeves are extended more than 60%
b Both sleeves are extended more than 80%
B*
What is the purpose of bullnose seal? (B1)
a. To prevent aerodynamic pressurization between translating sleeve inner and outer walls
b. To seal the gaps between blocker doors and fan duct cowl inner wall
c. To seal the gaps between the two reverser halves
A
What is the primary purpose of the thrust reverser aft cowl? (B1)
a. To provide a smooth surface for fan air exit and cover the turbine exhaust case of the engine
b. To cover the turbine exhaust case of the engine and provide area for pressure relief
c. To provide a load share structure for the engine and a smooth surface for fan air exit
A
What types of tension latches are there in the reverser cowl? (B1)
a. Split line, hoop tie, latch beam and V-band latches
b. Deflection limiter, aft cowl and latch beam latches
c. V-band, latch beam, load share and spit line latches
B
V-band latch (B1)
a. Holds the two reverser halves together
b. Holds the two reverser halves to engine fan case
c. Holds the two reverser halves to engine compressor case
A
Cascade segments must be installed (B1)
a. In pairs
b. In the correct positions
c. Before reverser removal
B
The Thrust Reverser Actuation System (TRAS) is actuated by (B1)
a. Fuel
b. Air
c. Hydraulic
C
Which reverser hydraulic actuators have locking feature? (B1)
a. Lower and middle
b. Middle and upper
c. Lower and upper
A
Synclock valve (SL), Isolation valve (IV) and Directional Control valve (DCV) are located (B1)
a. In the strut
b. On reverser torque box
c. On fan case
A
Thrust reverser test enable switch (B1)
a. Open DCV for reverser sleeve extension during maintenance
b. Unlocks the lock actuators for TRAS operation
c. Lets EEC open IV when engine is not running
C
After retraction, SL valve and IV are closed (B1)
a. Immediatelly after sleeves fully closed
b. When reverser close switch energized
c. After a time delay
C
