(c)
 On the HP ground connector a warning notice is in position to tell persons not to supply the ground air.

 (d)
 The access panels are removed (Ref. TASK 53-35-13-000-002):

R 1_FOR 23HB 191KB and 191BB.
R  2_FOR 24HB 192KB and 192FB.
R 1EFF : 106-149, 303-399, 401-499, 1 21-51-51Page 484 1 1 Aug 01/05 1 1 1CES 1

 Subtask 21-51-51-865-067
 B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------FOR 23HB 
R  **ON A/C 401-499,
R  49VU AIR COND/TEMP CTL/SYS 1 CHAN B/28VDC 122VU AIR COND/TEMP CTL SYS 1/CHAN A/115VAC 122VU AIR COND/TEMP CTL SYS 1/CHAN A/28VDC 122VU AIR COND/TEMP CTL SYS 1/CHAN B/115VAC  52HH 49HH 51HH 50HH  D08 X22X21Y18 
R  **ON A/C 106-149, 303-399, 401-499,
 FOR 24HB 
R  **ON A/C 401-499,
R R  122VU AIR COND/TEMP CTL SYS 2/CHAN A/115VAC 122VU AIR COND/TEMP CTL SYS 2/CHAN A/28VDC 122VU AIR COND/TEMP CTL SYS 2/CHAN B/28VDC 122VU AIR COND/TEMP CTL SYS 2/CHAN B/115VAC  53HH 55HH 56HH 54HH  W22W21 Y21Y20 
R  **ON A/C 106-149, 303-399, 401-499,
 4. Procedure_________
 Subtask 21-51-51-420-061
 A. Installation of the Attachment Components (Ref. Fig. 405A/TASK 21-51-51-991-008)
 (1) Put the support rods (5) in position on the brackets (22) and install the bushings (21), the bolts (20), the washers (23) and the nuts (24). 

R 1EFF : 106-149, 303-399, 401-499, 1 21-51-51Page 485 1 1 Aug 01/05 1 1 1CES 1 Subtask 21-51-51-420-062

 B. Installation of the Air Duct
 (1)
 Remove the protective covers from the air duct assembly.

 (2)
 Clean the component interfaces and/or the adjacent area.

 (3)
 Put a new o-ring (15) in position on the air duct flange.

 (4)
 Put the air duct assembly in its correct position and attach the v-clamps (12) and (13) but do not tighten the clamps.

 (5)
 Put the support rods (5) in position on the brackets (6).

 (6)
 Install the bushings (8), the bolts (7), the washers (9) and the nuts (10).

 (7)
 TORQUE the clamp (12) to between 0.81 and 0.93 m.daN (71.68 and 82.30 lbf.in).

 (8)
 TORQUE the clamp (13) to between 0.4 and 0.5 m.daN (35.39 and 44.24 lbf.in).

 (9)
 Put the bonding strap (4) in position and install the bolt (3), the washer (2) and the nut (1) (Ref. TASK 20-28-00-912-004).

 Subtask 21-51-51-220-059
 C. Post Installation Measurement and Adjustment
 (1)
 At the sleeve (24):

 -make sure that the dimension X is 160.5 +3.5 -3.5 mm (6.3189 +0.1377 -0.1377 in.).

 (2)
 At the support rod (5):

 -make sure that the dimension V between the support rod (5) and the bracket (22) is 1.2 mm (0.0472 in.) minimum.

 (3)
 If necessary adjust the support-rods to get the correct dimensions V and X:

 NOTE : Normally it is only necessary to adjust the aft support rod.
____
 (a)
 Bend the tab washer (27) away from the lock-nut (26).

 (b)
 Loosen the lock-nut (26).

R 1EFF : 106-149, 303-399, 401-499, 1 21-51-51Page 486 1 1 Aug 01/05 1 1 1CES 1

 (c) Remove the rod eye (25) and install a new tab washer (27) on the rod eye thread.
 (d) Install the rod eye (25).
 (e) Turn the rod eye (25) clockwise or counterclockwise until: - the dimensions V and X are in the correct limits and - the bolt (7) can still easily be installed.
 (f) Make sure that the threads of the rod eye (25) are deep enough in the support rod (5).
 NOTE : If you cannot push a needle or equivalent through the____ inspection hole, then rod eye is deep enough in the support rod.
 (g) Tighten the lock-nut (26).
 (h) Bend the tab washer (27) to safety the lock-nut (26).
 Subtask 21-51-51-865-068
 D. Make sure that this(these) circuit breaker(s) is(are) closed:
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------FOR 23HB 
R  **ON A/C 401-499,
R  49VU AIR COND/TEMP CTL/SYS 1 CHAN B/28VDC 122VU AIR COND/TEMP CTL SYS 1/CHAN A/115VAC 122VU AIR COND/TEMP CTL SYS 1/CHAN A/28VDC 122VU AIR COND/TEMP CTL SYS 1/CHAN B/115VAC  52HH 49HH 51HH 50HH  D08 X22X21Y18 
　
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