-191KB and
 -191BB.

 (b)
 For the air duct on the right air conditioning pack:

 -192KB and
 -192FB.
 4. Procedure
_________ **ON A/C 051-054,
 Subtask 21-51-51-020-065-A
 A. Removal of the Air Duct Assembly
 (Ref. Fig. 403/TASK 21-51-51-991-006-B)

 (1)
 Remove the pressure sense-line connector (2).

 (2)
 Remove the electrical connector (14).

 (3)
 Put blanking plugs on the disconnected line ends.

 (4)
 Remove the nut (13), the washer (12), the screw (10) and disconnect the bonding strap (11).

 (5)
 Remove the nuts (7), the washers (8), the bolts (4) and the bushings

 (5) from the three support rods (9).

 (6)
 Remove the v-clamps (1) and (3).

 (7)
 Lower the air duct assembly carefully and remove it.

 (8)
 Remove and discard the o-ring (15).

 (9)
 Put protective covers on the open duct ends.

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 **ON A/C 055-099, 201-299, 301-302,
 Subtask 21-51-51-020-065
 A. Removal of the Air Duct Assembly
 (Ref. Fig. 403A/TASK 21-51-51-991-006)

 (1)
 Remove the pressure sense-line connector (2).

 (2)
 Put blanking plugs on the disconnected line ends.

 (3)
 Remove the nut (13), the washer (12), the screw (10) and disconnect the bonding strap (11).

 (4)
 Remove the nuts (7), the washers (8), the bolts (4) and the bushings

 (5) from the three support rods (9).

 (5)
 Remove the v-clamps (1) and (3).

 (6)
 Lower the air duct assembly carefully and remove it.

 (7)
 Remove and discard the o-ring (15).

 (8) Put protective covers on the open duct ends. **ON A/C 051-099, 201-299, 301-302,
 Subtask 21-51-51-020-066
 B. Removal of the Support Rods
 (Ref. Fig. 405A/TASK 21-51-51-991-008)

 (1)
 Remove the nuts (24), the washers (23), the bolts (20), the bushings

 (21) and the support rods (9) from the attachment brackets (22).

 (2)
 Do the inspection of the components for in-service wear (Ref. TASK 21-51-51-200-002).

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 Attachment Components - Air Duct Figure 405/TASK 21-51-51-991-008-A
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 Attachment Components - Air Duct
 Figure 405A/TASK 21-51-51-991-008

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 TASK 21-51-51-400-002 Installation of the Air Duct upstream of the Flow Control Valve 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.
 NOTE : The procedure is the same for the air ducts of both packs.
____
 1.
 Reason for the Job

__________________
 Self Explanatory

 2.
 Job Set-up Information

______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific  Torque Wrench : range 0.00 to 1.20 m.daN
 (0.00 to 9.00 lbf.ft)
 B. Consumable Materials
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
Material No. 04-007  USA MIL-M-7866 MOLYBDENUM DISULFIDE POWDER (Ref. 20-31-00)
 C. Expendable Parts
 -------------------------------------------------------------------------------FIG.ITEM |DESIGNATION |IPC-CSN -------------------------------------------------------------------------------
15 o-ring 21-51-03 11B-090 15 o-ring 21-51-03 11E-090 16 tab washer 21-52-03 84 -080
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 D. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
　
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