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73-21-00
ALL ú ú C03 Page 505 ú Jul 15/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
(c) Keep the thrust lever in this position to keep the MEC power lever in contact with the stop.
~.............................................................................. | AIRPLANE MODEL | ENGINE TYPE | POWER LEVER ANGLE | VOLTAGE | ................................................................................ | 737-300 | CFM56-3-B1 | 130.0 degrees | 7.43 - 7.57 VDC | | | CFM56-3B-2 | 130.0 degrees | 7.43 - 7.57 VDC | | | CFM56-3C-1 | 120.8 degrees | 6.28 - 6.42 VDC | ................................................................................ | 737-400 | CFM56-3-B1 | 130.0 degrees | 7.43 - 7.57 VDC | | | CFM56-3B-2 | 130.0 degrees | 7.43 - 7.57 VDC | | | CFM56-3C-1 | 130.0 degrees | 7.43 - 7.57 VDC | ................................................................................ | 737-500 | CFM56-3-B1 | 130.0 degrees | 7.43 - 7.57 VDC | | | CFM56-3C-1 | 118.4 degrees | 5.98 - 6.12 VDC | 2..................…...............….....................….....................1
TABLE 1 - PLA VOLTAGE CHECK VALUES
S 975-006-C00
(7) Measure and make a record of the PLA RVDT voltage.
G-M56-MM-0245(1)-00-C
PMC-PLA Transducer Test Hookup Diagram Figure 502
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73-21-00
ALL ú
ú C01 Page 506
ú Nov 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
S 225-007-C00
(8) Make sure the voltage is between the values shown in
TABLE 1 - PLA VOLTAGE CHECK VALUES.
(a) This voltage is a function of airplane model and engine type.
S 825-008-C00
(9) If the voltage is not in the limit, adjust the PLA transducer gain as follows (Fig. 502):
(a)
Make sure that the MEC power lever stays against the maximum forward thrust stop.
(b)
Loosen the two screws that attach the adjustment well cover on the PMC. 1) Use a 7/64 inch (2.8 mm) hex wrench. 2) Move the cover in the counterclockwise direction.
CAUTION:_______DO NOT TRY TO TURN THE SLOTTED SCREW HEAD. DO NOT ADJUST THE NLR ADJUSTMENT. YOU CAN DAMAGE THE PMC.
(c)
Turn the PLA adjustment screw until the voltage on the PMC tester agrees with the values in TABLE 2 - PLA VOLTAGE SET VALUES.
NOTE: Use a 1/8 inch Allen wrench.
____ TABLE 2 is given as information because of the engine intermix configurations and spare engine interchanges between operators.
~.............................................................................. | AIRPLANE MODEL | ENGINE TYPE | POWER LEVER ANGLE | VOLTAGE | ................................................................................ | 737-300 | CFM56-3-B1 | 130.0 degrees | 7.48 - 7.52 VDC | | | CFM56-3B-2 | 130.0 degrees | 7.48 - 7.52 VDC | | | CFM56-3C-1 | 120.8 degrees | 6.33 - 6.37 VDC | ................................................................................ | 737-400 | CFM56-3-B1 | 130.0 degrees | 7.48 - 7.52 VDC | | | CFM56-3B-2 | 130.0 degrees | 7.48 - 7.52 VDC | | | CFM56-3C-1 | 130.0 degrees | 7.48 - 7.52 VDC | ................................................................................ | 737-500 | CFM56-3-B1 | 130.0 degrees | 7.48 - 7.52 VDC | | | CFM56-3C-1 | 118.4 degrees | 6.03 - 6.07 VDC | 2..................…...............….....................….....................1
TABLE 2 - PLA VOLTAGE SET VALUES
(d) Move the well cover in a clockwise direction until it is in its original position.
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