(3)
Remove the warning notice(s).
Subtask 30-21-51-865-051
C. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------122VU ANTI ICE/ENG/2 1DN2 W10 122VU ANTI ICE/ENG/1 1DN1 X10
Subtask 30-21-51-862-053
D. De-energize the ground service network
(Ref. TASK 24-42-00-862-001).
PROBE ICE PROTECTION - DESCRIPTION AND OPERATION
________________________________________________
1. General
_______ R The air data system (Ref. 34-10-00) includes several probes and sensors R (pitot and static probes, angle of attack and total air temperature (TAT) R sensors) located on the fuselage in zones particularly exposed to ice. R An electrical heating system integral with each probe operates permanently R to maintain probe efficiency. Permanent monitoring of the probes is ensured. R Warning is provided to indicate heating malfunction of each probe. R The air data system comprises three independent detection channels: R - 1 (Captain), R - 2 (First Officer), R - 3 (Standby).
2. Component Location
__________________ R (Ref. Fig. 001)
R -------------------------------------------------------------------------------R FIN | FUNCTIONAL DESIGNATION | PANEL|ZONE|ACCESS | ATA R | | | | DOOR | REF. R -------------------------------------------------------------------------------
R 6DA1 PHC-1 R 6DA2 PHC-2 R 6DA3 PHC-3 R 7DA1 PROBE-L STATIC, 1 R 7DA2 PROBE-L STATIC, 2 R 7DA3 PROBE-L STATIC, 3 R 8DA1 PROBE-R STATIC, 1 R 8DA2 PROBE-R STATIC, 2 R 8DA3 PROBE-R STATIC, 3 R 9DA1 PROBE-PITOT, 1 R 9DA2 PROBE-PITOT, 2 R 9DA3 PROBE-PITOT, 3
3. System Description
__________________
R A. Probe Ice Protection 121 831 30-31-34 122 831 30-31-34 121 831 30-31-34 127 824 34-11-16 127 824 34-11-16 121 811 34-11-16 128 824 34-11-16 128 824 34-11-16 122 811 34-11-16 125 812 34-11-15 126 822 34-11-15 125 812 34-11-15
R Electrical heating of the probes prevents ice accretion on the probes of
R the air data system:
R - pitot probes,
R - static probes,
R - angle of attack sensors,
R - TAT sensors.
R The TAT sensors are not heated on the ground.
R The ice protection system of the probes is arranged in three independent
R channels (1, 2 and 3).
Probe Ice Protection - Component Location
Figure 001
1EFF : ALL 1 30-31-00 Page 2
1 1 Feb 01/98
1 1
1CES 1
B. PHC
(1) The PHC controls and monitors heating of the probes given below:
- one pitot probe,
- one AOA sensor,
- two static probes,
- one TAT sensor.
(2) There are three PHCs, one per probe channel:
- PHC 1,
- PHC 2,
- PHC 3 (channel 3 does not include the TAT sensor).
(3) Electrical connections
(Ref. Fig. 002, 003, 004)
R 4. Power Supply____________
R (Ref. Fig. 002, 003, 004)
R The supply and protection of the components and functions is given below:
R -------------------------------------------------------------------------------
R |COMPONENT/FUNCTION | CIRCUIT | BUS |
R | | BREAKER | |
R |-------------------------------------------------|--------------|------------|
R | | Supply of TAT sensor heating | 1DA1 | 101XP-A |
R | |----------------------------------|--------------|------------|
R | | Supply of PHC | 2DA1 | 401PP |
R | |----------------------------------|--------------|------------|
R | PROBES | Supply of pitot probe heating | 3DA1 | 401XP-B |
R | 1 |----------------------------------|--------------|------------|
R | | Supply of angle of attack sensor | 4DA1 | 801XP |
R | | heating | | |
R | |----------------------------------|--------------|------------|
R | | Supply of static probe heating | 5DA1 | 101PP |
R |-------------------------------------------------|--------------|------------|
R | | Supply of TAT sensor heating | 1DA2 | 202XP-C |
R | |----------------------------------|--------------|------------|
R | | Supply of PHC | 2DA2 | 206PP |
R | |----------------------------------|--------------|------------|
R | PROBES | Supply of pitot probe heating | 3DA2 | 202XP-B |
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