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TEST FIRE DETECTION SENSING ELEMENT | Up
TM-55-1520-240-23-10 UH-1H/V and EH-1H Aircraft Manual | Next
INSPECT FIRE DETECTION SENSING ELEMENT |
TM 55-1520-240-23-10
12-10
TEST FIRE DETECTION SENSING ELEMENT
(Continued)
12-10
2.
Connect multimeter (4), set to RX1, to inner
conductor (5) and outer conductor (6) of cable
(1). Multimeter shall read infinity.
3.
Connect probe (7) to element (8). Set tester (9)
to 301ºC.
4.
Operate tester (9) (TM 55-4920-401-13).
5.
Check multimeter (4). Multimeter shall read 25
ohms.
6.
Turn off tester (9). Remove probe (7).
7.
Wait 10 minutes and check multimeter (4).
Multimeter shall read infinity.
8.
Disconnect multimeter (4).
9.
Connect two cables (1) to two fuselage
connectors (2). Torque cables to 65
inch-pounds.
Do not allow element to touch or
chafe on engine or engine cover.
Element can be damaged by chafing.
A damaged element can cause a
false fire indication or an inoperative
fire detection system resulting in
equipment damage and injury to
personnel.
10.
Check element (8). Element shall not chafe or
touch engine (10) or engine cover (11).
INSPECT
FOLLOW-ON MAINTENANCE:
Perform operational check of fire detection system
(TM 55-1520-240-T).
Close engine access cover (Task 4-50).
Close engine work platform (Task 2-2).
END OF TASK
12-31
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