B07241
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79-31-00
ALL ú ú C02 Page 513 ú Nov 15/96
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
POWER SWITCH
FUEL QUANTITY INDICATOR
SYSTEM TESTER
GROUNDED TO AIRPLANE STRUCTURE
CONNECTED TO 115 VOLTS POWER SOURCE
H T
C
TEST ADAPTER
"T" CABLES
F72731-114
GULL SYSTEM TESTER
Test Equipment Set-Up for Capacitance Simulation
Figure 504
TO COMPENSATOR
AND TANK UNITS
E62267
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ALL ú
ú C02 Page 514
ú Nov 15/96
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
(k) Adjust the COMP SIMULATOR knob on the tester to read 101.6 pf on the LCD display.
NOTE: This is the nominal capacitance of a full tank.
____
(l) Put the tester FUNCT switch in the SIM TU and COMP position.
S 865-112-C00
(6) FOR THE GULL TESTER; Prepare the test set to examine the Oil Quantity Indicators:
(a)
Connect the "T" cable to the airplane electrical plug and the oil quantity indicator.
(b)
Make sure that the banana plugs and the coaxial BNC connector on the tester box at the center of the "T" cable are disconnected.
NOTE: This disconnects the tank unit from the oil quantity
____
indicator.
(c)
Connect the "T" coaxial cable lead marked "H" to the tester terminal marked INDICATORS-UNSH.
(d)
Connect the "T" coaxial cable lead marked "T" to the tester terminal marked INDICATORS-COAX.
(e)
Connect the lead marked "C" to the tester terminal marked INDICATORS-COMP.
(f)
Set the DISPLAY SELECT switch to the CAP position.
(g)
Set the CAPACITANCE FUNCTION switch to the SIM SET - PROBE position.
(h)
Set the power switch to ON.
(i)
Measure the capacitance of the compensator.
(j)
Adjust the 15-390 SIMULATORS PROBE knob to read 21.4 pf on the LCD display.
NOTE: This is the nominal compensator capacitance for an empty
____
empty tank.
(k)
Set the CAPACITANCE FUNCTION switch to SIM SET - COMP.
(l)
Adjust the COMP SIMULATORS knob on the tester to read 101.6 pf on the LCD display.
NOTE: This is the nominal capacitance of a full tank.
____
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ALL ú ú C06 Page 515 ú Nov 12/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
(m) Put the tester CAPACITANCE FUNCTION switch in the A/C + PROBE SIM and + COMP SIM position.
G. Calibration Test of the Oil Quantity Indicators for an EMPTY and FULL Oil Tank
S 865-087-C00
(1) Remove the DO-NOT-CLOSE tags and close these circuit breakers:
(a) P6-2 Load Control Center
1) For Engine No. 1:
a) ENG 1 OIL QTY
2) For Engine No. 2:
a) ENG 2 OIL QTY
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