(7)
When the airplane is on the ground, the icing/de-icing cycle count is also held at zero so that there is no automatic activation of anti-ice systems. However, the ice detector heater is still enabled on the ground. A ground test of the ice detection system may be performed with the CMCS.
B. Control
(1)
To activate the ice detection system, place the WING ANTI-ICE and NACELLE ANTI-ICE switches on the anti-ice-rain removal module in the AUTO position. When the airplane is in the air, the wing and nacelle TAI systems will be automatically activated when icing conditions are detected.
(2)
Flight deck indication of icing conditions is performed
automatically by the ice detection system.
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A
747-400 FAULT ISOLATION/MAINT MANUAL
ICE DETECTION SYSTEM
COMPONENT FIG. SHT 102 QTY ACCESS/AREA REFERENCE AMM
CIRCUIT BREAKER - 1 117AL, MAIN EQUIP CTR, P414
CIRCUIT BREAKER -L ICE DETECTOR, C10395 1 414L10 117AL, MAIN EQUIP CTR, P414 *
COMPUTER - (FIM 45-10-00/101) R ICE DETECTOR, C10396 R CENTRAL MAINTENANCE, M7374 L CENTRAL MAINTENANCE, M7373 1 415L33 *
PROBE - L ICE DETECTOR, M6704 1 1 L SIDE FWD FUSELAGE 30-81-01
UNIT - (FIM 31-61-00/101) RELAY - (FIM 31-01-36/101) AIR/GROUND, R325 C EFIS/EICAS INTERFACE, M7352 L EFIS/EICAS INTERFACE, M7353 R EFIS/EICAS INTERFACE, M7351PROBE - R ICE DETECTOR, M6703RELAY - (FIM 31-01-39/101) AIR/GROUND, R226 1 1 R SIDE FWD FUSELAGE 30-81-01
* SEE THE WDM EQUIPMENT LIST
Ice Detection System - Component Index
Figure 101
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E49049
A
747-400 FAULT ISOLATION/MAINT MANUAL
AIRPLANESKIN (REF)
Ice Detection System - Component Location
Figure 102
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A
747-400 MAINTENANCE MANUAL
ICE DETECTION SYSTEM - ADJUSTMENT/TEST
______________________________________
1. General_______
A. This procedure contains two tasks. The first task is a ground test of the ice detection system. You will use the CMCS to do the ground test.
B. The second task is an operational test of the ice detection system. In the operational test, you will first do the ground test with the CMCS. Then you will apply pressure to the tip of the ice detector probe to supply a signal equivalent to ice on the tip.
C. There is no adjustment for the ice detection system.
TASK 30-81-00-715-001
2. Ground Test - Ice Detection System__________________________________
A. General
(1)
This ground test does a check of the ice detector operation.
(2)
This ground test does not do a check of the wing thermal anti-ice system or the engine inlet thermal anti-ice system.
B. References
(1) AMM 24-22-00/201, Manual Control
C. Access
(1) Location Zone
221, 222 Control Cabin
D. Preconditions
S 865-052
(1) These conditions are necessary for this task:
(a)
Electrical power on (AMM 24-22-00/201).
(b)
Integrated Display System (IDS) is serviceable (AMM 31-61-00/501).
E. Prepare for the Test
S 865-002
(1)
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本文鏈接地址：747-400 AMM 飛機(jī)維護(hù)手冊(cè) 防冰和排雨 ICE AND RAIN PROTECTION(98)
