(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a warning notice to tell persons not to energize the FADEC 1(2).
Subtask 78-31-17-010-075
B. Get Access
(1) Open the fan cowl doors (Ref. TASK 71-13-00-010-040):
FOR 1000EM1
437AL, 438AR
FOR 1000EM2
447AL, 448AR
(2) Put the access platform in position. Subtask 78-31-17-040-065
C. Make the thrust reverser unserviceable (Ref. TASK 78-30-00-481-041).
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4. Procedure
_________
(Ref. Fig. 501/TASK 78-31-17-991-302, 502/TASK 78-31-17-991-303)
Subtask 78-31-17-710-058
A. Operational Test of the Pivoting Door Deploy Switch
(1) Method 1:
(a) Locate the beam harness (25) on the forward bulkhead of the thrust reverser half door.
(b) Disconnect the plug F1 (E1) from the receptacle F2 (E2) (30) on the beam harness (25).
NOTE : The Plug F1 and Receptacle F2 are on the left half door.
____ Plug E1 and Receptacle E2 are on the right half door.
(c) Prepare the ohmmeter (V16902) for the test: 1 Set the functional control of the ohmmeter (V16902) to OHMS.
_
2 Set the range control to the R x 1 ohms range.
_
3 Set the ohmmeter (V16902) to zero.
_
(d) Connect the leads of the ohmmeter. CAUTION : DO NOT INSERT AN OVERSIZED TEST PROBE INTO A CONNECTOR
_______ SOCKET. DO NOT LET THE TEST LEAD HANG FROM A CONNECTOR SOCKET. THE CONNECTOR MAY BE DAMAGED OR THE PIN/SOCKET MAY BE BENT.
1 Connect the leads of the ohmmeter (V16902) to pins 2 and 3 of
_ the receptacle F2 (E2) (30). Check that the dial on the ohmmeter is at infinity.
a Manually open the upper and lower blocker doors to the
_ fully deployed position. The dial on the ohmmeter (V16902) will move to zero.
R b_ While moving the upper and lower deploy switch leverR laterally make sure that the ohmmeter (V16902) remains at R zero. If the ohmmeter does not remain at zero replace the R deploy switch lever (Ref. CMM 783235).
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Blocker Door Deploy Switch
Figure 501/TASK 78-31-17-991-302- 12 (SHEET 1)
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Blocker Door Deploy Switch
Figure 501/TASK 78-31-17-991-302- 22 (SHEET 2)
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R Blocker Door Deploy Swich Circuits Figure 502/TASK 78-31-17-991-303
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R c_ Manually close the upper blocker door to the fully stowed position. At the beginning of the blocker door movement, the dial on the ohmmeter (V16902) will move to infinity.
R d_ Manually open the upper blocker door to the fully deployed position. The dial on the ohmmeter (V16902) will move to zero.
R e_ Manually close the lower blocker door to the fully stowed position. At the beginning of the blocker door movement, the dial on the ohmmeter (V16902) will move to infinity.
R f_ Manually close the upper blocker door to the fully stowed position.
(e) Connect the leads of the ohmmeter (V16902) to pins 4 and 5 of the receptacle F2 (E2) (30). Check that the dial on the ohmmeter is at infinity.
1_ Manually open the upper and lower blocker doors to the fully deployed position. The dial on the ohmmeter (V16902) will move to zero.
R R R R 2_ While moving the upper and lower deploy switch lever laterallymake sure that the ohmmeter (V16902) remains at zero. If the ohmmeter does not remain at zero replace the deploy switch lever (Ref. CMM 783235).
R 3_ Manually close the upper blocker door to the fully stowed position. At the beginning of the blocker door movement, the dial on the ohmmeter (V16902) will move to infinity.
R 4_ Manually open the upper blocker door to the fully deployed position. The dial on the ohmmeter (V16902) will move to zero.
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