R 206 +3 -0 bar (2987.7766 +43.5113 -0.0000 psi).

R (2) Make sure that the flow from the ground power cart is not less than
R 95 l.min (25.0961 USgal.mn).
R (3) Make sure that the by-pass of the ground power cart is fully closed.
R (4) Make sure that the fluid level in the Blue hydraulic reservoir is not

R below the low level warning. R -------------------------------------------------------------------------------R ACTION RESULT R -------------------------------------------------------------------------------
R 1. On the test set:
R - push the lamp test switch.
R 2. On the test set:
R - set the aircraft selector
R switch to the A320 position.

R 3. On the test set:

R - set and hold the PUMP/SPIN
R speed indicator switch for
R approximately 20 seconds in the
R SPIN position.

R
R

R
R
R

R If the green indicator light is
R on:

On the test set:
-all the lamps come on.
On the ECAM lower DU:
-
the pressure of the Blue hydraulic system decreases to approximately 2500 psi (172.3689 bar).

At the RAT:

-
the RAT turns.

On the test set:

-
the green indicator light can come on.

 -------------------------------------------------------------------------------
ACTION RESULT -------------------------------------------------------------------------------
R  - continue with the step 8. of 
R  this test. 
R  If the green indicator light is 
R  not on: 
R  - continue the test as follows: 
R  4. On the test set: 
R  - release the PUMP/SPIN speed 
R  indicator switch. 
R  5. Pressurize the Blue hydraulic 
R  system with the Blue electric 
R  pump (Ref. TASK 29-10-00-863-
R  003). 
R  NOTE : The operation of the Blue____ 
R  electric pump at the same 
R  time as the ground power 
R  cart is necessary to 
R  supply the RAT with a 
R  sufficient flow. 
R  6. On the test set: 
R  - set and hold the PUMP/SPIN 
R  speed indicator switch in the 
R  SPIN position. 
R  7. On the ground power cart: 
R  CAUTION : STOP THE TEST_______ 
R  IMMEDIATELY IF THE RAT 
R  DOES NOT TURN AT ITS 
R  CORRECT SPEED IN 20 
R  SECONDS. IF NOT THERE 
R  IS A RISK OF DAMAGE TO 
R  THE RAT. 
R  - increase the pressure to 2800 
R  psi (193.0531 bar) (pressure on 
R  the HYD page on the ECAM lower 
R  DU) 

At the RAT:
-the RAT stops.
At the RAT:
-the RAT turns at its usual speed (5210 to 5590 rpm) in less than 20 seconds.

 -------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
R 
R 
R 
R 
R 
R 
R 
R 
R 
R 
R 
R 
R 
R  8. On the test set: 
R  - release the PUMP/SPIN switch. 
R 
R 
R 
R 
R 
R 
R 
R 
R 
R  9. If the results of the test are 
R  not correct, do the subsequent 
R  steps in their sequence until you 
R  find the fault. Then do the test 
R  again: 
R 
R  - make sure that the CONTROL UNIT 
R  - RAT is correctly connected to 
R  the RAT control panel 
R 
R  - do a check of the electrical 
R  connection of the solenoid 
R  valve of the RAT ground check 
R  module 
R 

On the test set:
-the green indicator light comes on and stays on.
NOTE : The RAT speed stays almost
____ constant, between 5210 and 5590 rpm.
On the ground power cart:
-
the pressure must be 206 bar (2987.7766 psi) + 3 bar (43.5113 psi)

-0 bar (0.0000 psi),

-
the flow must be between 70 l.min (18.4918 USgal.mn) and 75 l.min (19.8127 USgal.mn).

On the test set:
　
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