**ON A/C 001-049, 051-099, 101-149, 201-299,
 Subtask 21-21-49-010-050
 B. Get Access
 (1)
 Put the access platform in position at the FWD cargo compartment door

 825.

 (2)
 Open the FWD cargo compartment door 825 (Ref. TASK 52-30-00-860-001).

 (3)
 Remove the access panel 131MW.

R **ON A/C 151-199, 401-499,
 Subtask 21-21-49-010-050-A
 B. Get Access
 (1)
 Put the access platform in position at the FWD cargo-compartment door

 825.

 (2)
 Open the FWD cargo-compartment door 825 (Ref. TASK 52-30-00-860-001).

 (3) Remove the sidewall panel 131SW (Ref. TASK 25-54-12-000-003).
 **ON A/C 301-399,

 Subtask 21-21-49-010-050-B
 B. Get Access
 (1)
 Put the access platform in position at the FWD cargo compartment door

 825.

 (2)
 Open the FWD cargo compartment door 825 (Ref. TASK 52-30-00-860-001).

 (3) Remove the access panel 131PW.
 **ON A/C ALL

 4. Procedure
_________
 **ON A/C 001-049, 051-099, 101-149, 201-299,

 (Ref. Fig. 701/TASK 21-21-49-991-001) R **ON A/C 151-199, 401-499,
 (Ref. Fig. 701A/TASK 21-21-49-991-001-A)
 **ON A/C 301-399,

 (Ref. Fig. 701B/TASK 21-21-49-991-001-B)

 Cockpit Air Supply Duct Grid
 Figure 701/TASK 21-21-49-991-001

R 1EFF : 001-049, 051-099, 101-149, 201-299, 1 21-21-49Page 704 1 1 May 01/05 1 1 1CES 1

 Cockpit Air Supply Duct Grid
 Figure 701A/TASK 21-21-49-991-001-A

R 1EFF : 151-199, 401-499, 1 21-21-49Page 705 1 1 Aug 01/05 1 1 1CES 1

R  Cockpit Air Supply Duct Grid 
R  Figure 701B/TASK 21-21-49-991-001-B 
R 1EFF :  301-399,  1  21-21-49 Page 706 
1  1  May 01/04
 1  1
 1CES  1

 **ON A/C ALL
 Subtask 21-21-49-020-050
 A. Removal of the Duct
 (1) Remove the clamps (2).
 (2) Remove the duct (1). Subtask 21-21-49-110-050
 B. Clean the grid WARNING : USE SOLVENTS/CLEANING AGENTS, SEALANTS AND OTHER SPECIAL
_______ MATERIALS ONLY WITH A GOOD SUPPLY OF AIR. OBEY THE MANUFACTURERS INSTRUCTIONS. PUT ON PROTECTIVE CLOTHING. DO NOT GET THEM IN YOUR MOUTH. DO NOT SMOKE. DO NOT BREATHE THE GAS. THESE MATERIALS ARE POISONOUS, FLAMMABLE AND SKIN IRRITANT. GET MEDICAL HELP IF YOUR SKIN OR EYES BECOME IRRITATED.
 (1) Clean the grid (3) with baltane CLEANING AGENTS (Material No. 11-004).
 Subtask 21-21-49-420-050
 C. Installation of the Duct
 (1)
 Install the duct (1).

 (2)
 Install the clamps (2).

 1EFF : ALL 1 21-21-49Page 707 1 1 May 01/04R 1 1 1CES 1

 5. Close-up
________
 **ON A/C 001-049, 051-099, 101-149, 201-299,

 Subtask 21-21-49-410-050
 A. Close Access
 (1)
 Make sure that the work area is clean and clear of tool(s) and other items.

 (2)
 Install the access panel 131MW.

 (3)
 Close the FWD cargo compartment door 825 (Ref. TASK 52-30-00-860-002).

 (4) Remove the access platform(s). R **ON A/C 151-199, 401-499,
 Subtask 21-21-49-410-050-A
 A. Close Access
 (1)
 Make sure that the work area is clean and clear of tool(s) and other items.

 (2)
 Install the sidewall panel 131SW (Ref. TASK 25-54-12-400-003).

 (3)
 Close the FWD cargo-compartment door 825 (Ref. TASK 52-30-00-860-002).

 (4) Remove the access platform(s).
 **ON A/C 301-399,

 Subtask 21-21-49-410-050-B
 A. Close Access
 (1)
 Make sure that the work area is clean and clear of tool(s) and other items.

 (2)
 Install the access panel 131PW.

R R  (3) Close the FWD cargo compartment door 825 (Ref. TASK 52-30-00-860-002). 
R  (4) Remove the access platform(s).
 **ON A/C ALL
 Subtask 21-21-49-862-050
 B. De-energize the ground service network (Ref. TASK 24-42-00-862-001).

 FAN - RECIRCULATION (14HG,15HG) - REMOVAL/INSTALLATION
______________________________________________________ TASK 21-21-51-000-001 Removal of the Cabin Recirculation Fans 15HG and 14HG WARNING : MAKE SURE THAT AIR IS NOT SUPPLIED TO THE AIR CONDITIONING SYSTEM
_______ FROM THE MAIN ENGINE, THE APU OR A GROUND SOURCE. HOT COMPRESSED AIR CAN CAUSE INJURY TO PERSONNEL.
　
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