B. Expendable Parts

 -------------------------------------------------------------------------------
FIG.ITEM |DESIGNATION |IPC-CSN
 -------------------------------------------------------------------------------
3 filter 30-11-51 02 -180 3 filter 30-11-51 02A-180 3 filter 30-11-51 02B-180 4 filter 30-11-51 02 -180 4 filter 30-11-51 02A-180 4 filter 30-11-51 02B-180
 C. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
30-11-51-000-002 Removal of the Anti-Ice Valve Filter
 30-11-51-400-002 Installation of the Anti-Ice Valve Filter
 CMM 301151
 CMM 301152

R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
 30-11-51-991-002 Fig. 402
 **ON A/C 301-399,
 30-11-51-991-002-A Fig. 402A

R **ON A/C ALL

 3. Job Set-up
__________
 Subtask 30-11-51-941-058
 A. Safety Precautions
 (1)
 Put the safety barriers in position.

 (2)
 Before you do work on the Ice Protection system, put warning notices in position to tell persons not to: - operate the pneumatic system - operate the engines - operate the slats - operate the APU switch.

 (3)
 On panel 191DB, put a warning notice in position to tell persons not to pressurize the bleed air system.

 Subtask 30-11-51-865-056
 B. Open, safety and tag this(these) circuit breaker(s):
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU FLIGHT CONTROLS/SLT/CTL AND MONG/SYS1 5CV B06 49VU ANTI ICE/WING/CTL 2DL C02 49VU ANTI ICE/WING/MONG 1DL C01
 121VU FLIGHT CONTROLS/SLT/CTL/SYS2 7CV R21
R 1EFF : ALL 1 30-11-51Page 429 1 1 Feb 01/05 1 1 1CES 1

 4. Procedure
_________

R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
 Subtask 30-11-51-960-050
 A. Replacement of the Wing Anti-Ice Valve Filter
 (Ref. Fig. 402/TASK 30-11-51-991-002)

 (1) Remove the filter (4) from the wing anti-ice valve (Ref. TASK 30-11-51-000-002).
 NOTE : Refer to the CMM (Ref. CMM 301151) to see if cleaning of the
____ filter (4) is permitted. If not, discard it and install a new filter (4).
 (2) Install a replacement filter (4) in the wing anti-ice valve (Ref. TASK 30-11-51-400-002).
 **ON A/C 301-399,
 Subtask 30-11-51-960-050-A
 A. Replacement of the Wing Anti-Ice Valve Filter
 (Ref. Fig. 402A/TASK 30-11-51-991-002-A)

 (1) Remove the filter (3) from the wing anti-ice valve (Ref. TASK 30-11-51-000-002).
 NOTE : Refer to the CMM (Ref. CMM 301152) to see if cleaning of the
____ filter (3) is permitted. If not, discard it and install a new filter (3).
 (2) Install a replacement filter (3) in the wing anti-ice valve (Ref. TASK 30-11-51-400-002).

R **ON A/C ALL

 5. Close-up
________ Subtask 30-11-51-865-057
 A. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 5CV, 7CV, 1DL, 2DL.
 Subtask 30-11-51-942-052
 B. Removal of Equipment
 (1)
 Make sure that the work area is clean and clear of tool(s) and other items.

 (2)
 Remove the safety barriers.

 (3)
 Remove the warning notice(s).

 (4)
 Remove the access platform(s).

 (5)
 Remove the ground support and maintenance equipment, the special and standard tools and all other items.

 ENGINE AIR INTAKE ICE PROTECTION - DESCRIPTION AND OPERATION
____________________________________________________________
 1. General
_______ R (Ref. Fig. 001) R The ice protection system of the engine air intakes is normally selected R only in icing conditions. R Ice protection heats the intake cowls with air bled from the engine R compressor. R The function of the ice protection of the engine air intakes is to supply R bleed air to heat the inlet lip during icing encounters. This maintains the R inlet duct of the engine free of harmful accumulation of ice. R The installation consists of ducting, coupling, seals, a shutoff valve, R mechanical supports and a swirl nozzle. R The air bled from the fifth stage of the high compressor is the heat source. R A solenoid-operated shutoff valve (which is designed to be spring loaded in R the closed position in case of failure) provides the on-off control. The R swirl nozzle distributes the air within the leading edge of the intake cowl. R The spent air exhausts via a flush duct in the aft cavity of the intake R cowl.
　
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