(h)
Set the switches on the test set as follows: 1) LVDT FEEDBACK - A OFF, B ON 2) LVDT EXCITATION - A OFF, B ON 3) SOLENOID EXCITATION (PISTON and ENGAGE) - A OFF, B ON 4) NSS EXCITATION - A OFF, B OFF 5) NSS FEEDBACK - A OFF, B OFF 6) CURRENT SELECT - B T-VALVE
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A 737-300/400/500MAINTENANCE MANUAL
7) SOLENOIDS ON/OFF (center switch) - ON 8) A&B SOLENOID - A NORM, B NORM 9) ACTUATOR SELECT - B ONLY 10) POWER - ON
(i) Make sure that these lights on the test set are on: 1) SOLENOID EXCITATION (PISTON and ENGAGE) - B 2) LVDT EXCITATION - B 3) POWER
NOTE:____ All other lights must be OFF.
(j) (k) (l) (m) Connect the VTVM to the LVDT FEEDBACK - B J10B and J11B.Use the POSITION CONTROL B to align the elevator to the index mark |0.06 inch (|0.10 degree).Make sure that the VTVM reads 2.00 |0.03 volts. If it is not, do a check of the elevator rigging. Lock the POSITION CONTROL B in its position.Set up the conditions as shown in the table below. Make sure that the right elevator positions are in the tolerances as in the table.
NOTE:____ Set the SOLENOID B switch to the B NORM position after each condition.
~.............................................................................
|CONDITION| HYDRUALIC | SOLENOID | RIGHT ELEVATOR | TOTAL TRAVEL |
| | | | POSITION (MAX) | DISTANCE (MIN) |
| ............. .. ....................... |
| | A | B | B | UP (X) | DOWN (Y) | (X) + (Y) |
............................................................................... | 1 | ON | ON | +HDOVR | 1.01" | | | | | | | | (1.70°) | | | ........................................................... 1.22" | | 2 | ON | ON | -HDOVR | | 1.01" | (2.05°) | | | | | | | (1.70°) | | ............................................................................... | 3 | OFF | ON | +HDOVR | 1.01" | | | | | | | | (1.70°) | | | ........................................................... 1.22" | | 4 | OFF | ON | -HDOVR | | 1.01" | (2.05°) | | | | | | | (1.70°) | | 2.........…......…......…...........…..........…..........…...................1
(n) Set the SOLENOID B to the B NORM position.
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A 737-300/400/500MAINTENANCE MANUAL
(4) S 865-024Decrease the pitot pressure to 0 psig.
(5) S 725-070Increase the pitot pressure to 1.30 |0.05 psgi to do this single authority check: (a) Set up the condition as shown in the table below. Make sure that the right elevator position is in the tolerances as in the table.
NOTE:____ Set the SOLENOID B switch to the B NORM position after each condition.
~.............................................................................
|CONDITION| HYDRUALIC | SOLENOID | RIGHT ELEVATOR | TOTAL TRAVEL |
| | | | POSITION (MAX) | DISTANCE (MIN) |
| ............. .. ....................... |
| | A | B | B | UP (X) | DOWN (Y) | (X) + (Y) |
............................................................................... | 1 | ON | ON | +HDOVR | 1.38" | | | | | | | | (1.70°) | | | ........................................................... 1.78" (3.00°) | | 2 | ON | ON | -HDOVR | | 1.34" | | | | | | | | (1.70°) | | 2.........…......…......…...........…..........…..........…...................1
(b)
Set the switches on the test set as shown in the step 2.G.(3)(a).
(c)
Set up the conditions as shown in the table below. Make sure that the right elevator positions are in the tolerances as in the table.
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