C.
Prepare to Do the Test
S 864-015
(1)
Supply electrical power (Ref 24-22-00).
D.
Do the Test
S 714-016
(1)
To do the test, do the steps that follow:
(a)
Push the PRESS/TEST switch on the front panel of the PSEU to do a lamp test.
(b)
Make sure the five indicator lights come on.
(c)
Make sure the display show the code 888.
1) If no indicator light comes on or no code 888 shows, push the RESET/TEST and the TARGET/TEST switches at the same time.
NOTE: When the PRESS/TEST and the TARGET/TEST switches
____ are pushed together, the internal circuit breaker of the PSEU will reset the BITE.
(d)
Push the BIT switch to see the in flight faults. 1) Continue to push the BIT switch until the display shows
000.
NOTE: The display will show the code 000 if there are
____ no faults or if all the faults have been shown. All the panel indicators will go off two minutes after they come on.
2) Write down each fault shown. 3) Write down the EICAS status/maintenance messages if they are shown.
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(e) Put the dials for the PSEU SENSOR CHANNEL SELECT, to any code but the codes 500 through 505.
WARNING: DO THE DEACTIVATION PROCEDURE FOR THE SPOILERS OR MOVE ALL
_______ PERSONS AND EQUIPMENT AWAY FROM THE SPOILERS. THE SPOILERS CAN RETRACT QUICKLY AND CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(f)
Do the deactivation procedure for the spoilers (Ref 27-61-00) or move all persons and equipment away from the spoilers.
(g)
Push the RESET switch to erase the memory of the PSEU.
NOTE: While you erase the PSEU memory the display will
____
flash the code EEE.
(h)
Push the VERIFY switch to do a test of the on ground system.
NOTE:____The display will flash CCC during the test. Permit about 2 minutes for the test of the on ground systems.
(i)
Make sure the display shows the code 999 when the test is completed.
NOTE: When the test is completed, the display will show
____ the code 999. The indicator lights on the panel will go off after 60 seconds.
The air/ground relays go to the air mode then to the ground mode. This will cause nuisance EICAS messages, the flight compartment lights will flash, and the electrical power bus can switch. This is usual.
(j) Do the steps that follow to get the maintenance data from the EICAS memory: 1) Push the ECS/MSG switch on the right side panel, P61. 2) Push the EVENT AUTO READ switch to show the EICAS
maintenance data in the EICAS memory. 3) Write down the data shown. 4) Push the ERASE switch. 5) Continue to do these steps until no more maintenance data
is shown when the EVENT AUTO READ switch is pushed.
E. Put the Airplane Back to Its Usual Condition
S 864-017
(1)
Remove electrical power if it is not necessary (Ref 24-22-00).
S 444-018
(2)
Do the activation procedure for the spoilers if you did the
deactivation procedure (Ref 27-61-00).
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S 414-019
(3) Close the access door, 119BL, for the main equipment center.
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