R Proximity Sensor/Switch Inductance Check Data - Simulated Flight Condition Figure 515/TASK 32-31-73-991-040- 22 (SHEET 2)
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(4) Put a warning notice on the GRAVITY GEAR EXTN handle (panel 110VU) to tell persons not to operate the landing gear.
Subtask 32-31-73-860-069
B. Aircraft Maintenance Configuration WARNING : MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROLS ARE
_______ CLEAR. MOVEMENT OF FLIGHT CONTROLS CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE.
(1)
Make sure that the flaps are fully retracted (Ref. TASK 27-50-00-866-009).
(2)
Install the TOOL-ZERO LOCKING, FLAP SLAT CTL LEVER (98D27803500001) on the flap/slat control lever.
(3)
Open the MLG doors (Ref. TASK 32-12-00-010-001).
(4)
Make sure a GROUND LOCK SLEEVE is correctly installed on each MLG door actuating-cylinder.
(5)
Open the NLG doors (Ref. TASK 32-22-00-010-001).
(6)
Make sure that a SAFETY PIN - NLG DOOR is correctly installed in the rigging holes of each NLG door.
(7)
Open the FWD and AFT cargo-compartment doors (Ref. TASK 52-30-00-860-001).
(8)
Make sure that a SAFETY LOCK - ACTUATOR, CARGO DOORS is correctly installed on the actuator of each cargo-compartment door.
Subtask 32-31-73-010-063
C. Get Access to the LGCIU ARINC Trays
(1)
Put the access platform in position at the access door 811.
(2)
Open the access door 811.
(3)
Remove the two LGCIUs (Ref. TASK 32-31-71-000-001).
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4. Procedure_________
Subtask 32-31-73-760-050
R A. Inductance Check of the Proximity Sensors/Switches - Aircraft On-Ground Condition
NOTE : The inductance value at the target-near position is very important____ to the correct operation of the proximity sensor/switch.
(1) De-energise the aircraft electrical circuits (Ref. TASK 24-41-00-862-002).
(2) Check each applicable proximity sensor/switch as follows:
(Ref. Fig. 513/TASK 32-31-73-991-038, 514/TASK 32-31-73-991-039)
(a) Get the related LGCIU ARINC connector pin numbers of the applicable proximity sensor/switch from the applicable table.
(b) Find the related pin locations in connector AA of the applicable LGCIU ARINC tray.
R (c) Use a 1 KHz inductance meter accurate to +/- 0.25% to measure and record the inductance between the applicable pins of connector AA.
R R (d) Compare the recorded inductance value with the value given in the applicable table. If the recorded inductance value is not as specified, refer to Para. 4.D.
(3) If a check of a MLG or NLG uplock proximity sensor is necessary, check the target-near inductance as follows:
NOTE : This check will give a simulated target-near position____ inductance value. An accurate check can only be made with the landing gear retracted (the full weight of the gear will then be applied to the uplock).
(a) Use a non-metallic rod to fully close the locking mechanism of the applicable uplock assembly.
(b) Check and record the applicable proximity sensor inductance again.
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(c) Compare the recorded inductance value with the value given in the R table. If the recorded inductance value is not as specified, R refer to Para. 4..D.
NOTE : The closed uplock(s) will be opened automatically when the
____ hydraulics are pressurized and the electrical circuits are energized if:
-
the landing-gear control lever 6GA is in the DOWN position
-
the MLG door ground-control-handles are locked in the OPEN position (Ref. TASK 32-12-00-010-001)
-
the NLG ground door-opening handle is locked in the opening position (Ref. TASK 32-22-00-010-001)
-
the landing gear doors are open and safetied (Ref. TASK 32-00-00-481-002).
Subtask 32-31-73-860-070
B. Aircraft Maintenance Configuration
WARNING : MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROLS ARE
_______ CLEAR. MOVEMENT OF FLIGHT CONTROLS CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE.
(1)
Install the two LGCIUs (Ref. TASK 32-31-71-400-001).
(2)
If necessary, release the MLG or NLG uplocks as follows:
NOTE : This is only necessary if a check of an uplock proximity
____ sensor target-near inductance was made in Paragraph 4A.
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