S 465-043
(3)
Connect the multimeter between the outer shell of the lower fan detector element and the airplane ground.
(a) Make sure the resistance is less than 1 ohm.
S 865-045
(4)
Disconnect the multimeter from the airplane.
S 865-046
(5)
Connect the multimeter between the outer shell of the core detector element and the airplane ground.
(a) Make sure the resistance is less than 1 ohm.
S 865-047
(6)
Disconnect the multimeter from the airplane.
S 865-048
(7)
Connect the multimeter between the outer shell of the strut detector element and the airplane ground.
(a) Make sure the resistance is less than 1 ohm.
S 865-049
(8) Disconnect the multimeter from the airplane.
G. Do the test of the warning circuits for engine 2.
S 215-061
(1) Make sure that all three loop switches on the test box are in the NORMAL position.
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737-300/400/500MAINTENANCE MANUAL
S 425-062
(2) AIRPLANES WITH TERMINAL LUG CONNECTORS; Connect two C26002-4 cable assemblies as follows:
(a)
Connect the red alligator clip of one cable assembly to the A/1 (loop A) terminal lug of the upper fan detector.
(b)
Connect the black alligator clip to an airplane ground source.
(c)
Connect the red banana plug to the HI (red) jack of loop A on the test box.
(d)
Connect the black banana plug to the GND (black) jack of loop A on the test box.
(e)
Connect the red alligator clip of the second cable assembly to the B/2 (loop B) terminal lug of the upper fan detector.
(f)
Connect the black alligator clip to an airplane ground source.
(g)
Connect the red banana plug to the HI (red) jack of loop B on the test box.
(h)
Connect the black banana plug to the GND (black) jack of loop B on the test box.
S 425-064
(3) AIRPLANES WITH ELECTRICAL CONNECTORS; Connect the C26002-22,-25 cable assemblies as follows:
(a)
Disconnect these electrical connectors:
1) D2898 (Upper fan detector - loop A)
2) D2902 (Upper fan detector - loop B)
(b)
Connect the electrical connector (red) -22 cable assembly to the loop A upper fan detector.
(c)
Connect the alligator clip (black) to an airplane ground source.
(d)
Connect the red banana plug to the HI (red) jack of loop A on the test box.
(e)
Connect the black banana plug to the GND (black) jack of loop A on the test box.
(f)
Connect the electrical connector (red) of the second cable assembly to the loop B upper fan detector.
(g)
Connect the alligator clip (black) to an airplane ground source.
(h)
Connect the red banana plug to the HI (red) jack of loop B on the test box.
(i)
Connect the black banana plug to the GND (black) jack of loop B on the test box.
S 865-157
(4) Close these circuit breakers on the P6 panel:
(a)
FIRE PROTECTION DETECTION - ENG 2
(b)
MASTER WARNING AND CONTROL
S 865-165
(5) Make sure these indications occur:
(a) Make sure the INOP lights for engine 2 loop-A and loop-B on the M279 module are off.
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737-300/400/500MAINTENANCE MANUAL
(b) Make sure the FAULT light on the P8-1 panel is on.
NOTE: The FAULT light is on due to the FIRE PROTECTION
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