Subtask 30-21-49-020-053
 A. Removal of the Top Anti-ice Duct
 (1)
 Cut and remove the lockwire from the four engine bolts (10) that attach the top anti-ice duct (15) to the engine.

 (2)
 Remove the bolts (10) and the seal (5). Keep the seal (5) to use again if it is serviceable.

 (3)
 Remove the coupling (20) that connects the top anti-ice duct (15) to the middle anti-ice duct (35). Keep the seal (25) to use again if it is serviceable.

 (4)
 Put blanking plugs on the two ends of the top anti-ice duct (15), the middle anti-ice duct (35), and the engine port.

 (5)
 Remove the top anti-ice duct (15) from the engine.

 TASK 30-21-49-400-046
 Installation of the Top Anti-ice Duct
 1. Reason for the Job
__________________
 Self Explanatory
 2. Job Set-up Information
______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific fiber hammer No specific warning notice No specific access platform 0.5 m (1 ft. 8 in.) No specific Torque Wrench : range 36.00 to 220.00 lbf.in
 (0.40 to 2.60 m.daN)
 B. Consumable Materials
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
Material No. CP04-003 USA MIL-T-5544
 lubricant (Ref. 70-30-00) Material No. CP8001 *
 lockwire 0.032 in. (0.8 mm) dia (Ref. 70-30-00) Material No. CP8002 *
 lockwire 0.032 in. (0.8 mm) dia (Ref. 70-30-00)
 C. Expendable Parts
 -------------------------------------------------------------------------------FIG.ITEM |DESIGNATION |IPC-CSN -------------------------------------------------------------------------------
5 seal 30-21-49 01A-060 25 seal 30-21-49 01A-070 D. Referenced Information

 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
24-42-00-861-001 Energize the Ground Service Network from the External Power 24-42-00-862-001 De-energize the Ground Service Network Supplied from
 the External Power
 71-13-00-010-040 Opening of the Fan Cowl Doors
 71-13-00-410-040 Closing of the Fan Cowl Doors
 78-30-00-081-041 Make the Thrust Reverser Serviceable after

 Maintenance
 78-30-00-481-041 Make the Thrust Reverser Unserviceable for

 Maintenance
 78-36-00-010-040 Opening of the Thrust Reverser Doors
 78-36-00-410-040 Closing of the Thrust Reverser Doors

R **ON A/C 001-049, 051-060, 062-099, 101-149, 151-199, 201-299, 301-399, R 401-499,
 30-21-49-991-302 Fig. 403
 **ON A/C 061-061,
 30-21-49-991-302-A Fig. 403A
 **ON A/C ALL
 3. Job Set-up
__________
 Subtask 30-21-49-860-066
 A. Aircraft Maintenance Configuration
 (1)
 Make sure that the ground service network is energized (Ref. TASK 24-42-00-861-001).

 (2)
 On the center pedestal, on the ENG panel 115VU, make sure that a warning notice is in position to tell persons not to start the engine.

 (3)
 On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a warning notice is in position to tell persons not to energize the FADEC 1(2).

 (4)
 Make sure that the access platform is in position.

 Subtask 30-21-49-010-062
 B. Get Access
 (1)
 Make sure that the fan cowl doors are open (Ref. TASK 71-13-00-010-040): FOR 1000EM1 437AL, 438AR FOR 1000EM2 447AL, 448AR

 (2)
 Make sure that the thrust reverser doors are open (Ref. TASK 78-36-00-010-040): FOR 1000EM1 451AL, 452AR FOR 1000EM2 461AL, 462AR

 Subtask 30-21-49-040-057
 C. Make sure that the thrust reverser is unserviceable (Ref. TASK 78-30-00-481-041).
 Subtask 30-21-49-865-062
 D. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------122VU ANTI ICE/ENG/2 1DN2 W10 122VU ANTI ICE/ENG/1 1DN1 X10
 4. Procedure
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