C. Expendable Parts
-------------------------------------------------------------------------------FIG.ITEM |DESIGNATION |IPC-CSN -------------------------------------------------------------------------------
R 23 gasket 21-26-01 18 -140 23 gasket 21-26-01 18A-140 R 25 gasket 21-26-01 18 -120 25 gasket 21-26-01 18A-120
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 21-26-42-991-003 Fig. 602
3. Job Set-up
__________
CAUTION : USE ONLY THE GROUND SERVICE NETWORK TO SUPPLY ELECTRICITY BECAUSE
_______ THE AVIONICS VENTILATION SYSTEM IS NOT SERVICEABLE. IF YOU ENERGIZE THE AIRCRAFT ELECTRICAL CIRCUITS WITHOUT THE VENTILATION SYSTEM YOU WILL CAUSE DAMAGE TO ELECTRICAL EQUIPMENT.
Subtask 21-26-42-861-053
A. Energize the ground service network
(Ref. TASK 24-42-00-861-001).
Subtask 21-26-42-865-053
B. Open, safety and tag this(these) circuit breaker(s):
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU AIR COND/AVNCS VENT/CTL 6HQ D06 49VU AIR COND/AVNCS VENT/CTL 5HQ D05
Subtask 21-26-42-010-053
C. Get Access
(1)
Put the access platform in position at the access door 812.
(2)
Open the access door 812.
1EFF : ALL 1 21-26-42Page 610 1 1 May 01/05R 1 1 1CES 1
4. Procedure
_________
(Ref. Fig. 602/TASK 21-26-42-991-003) R **ON A/C 001-049, 053-099, 101-149, 151-199, 201-299, 301-399, 401-499,
Subtask 21-26-42-020-053
A. Remove the Outlet Duct
(1)
Carefully move the insulating blankets away from the work area.
(2)
Remove the clamps (24). Slide the flexible sleeve (29) on the duct (28).
NOTE : Do not discard the clamps (24). You must keep and use them
____
during the installation procedure.
(3) Remove the clamps (22) and slide the flexible sleeve (20) on the duct (32).
NOTE : Do not discard the clamps (22). You must keep and use them
____
during the installation procedure.
(4)
Remove the attachment screws (26), (30) and the washers (27), (31).
(5)
Carefully remove the ducts (28) and (32).
(6)
Remove the flexible sleeves (29) and (30) from the ducts (28) and (32).
(7) Put blanking plugs on the disconnected line ends.
**ON A/C 051-052,
Subtask 21-26-42-020-053-A
A. Remove the Outlet Duct
(1)
Carefully move the insulating blankets away from the work area.
(2)
Remove the clamps (24). Slide the flexible sleeve (29) on the duct (28).
Outlet Duct Figure 602/TASK 21-26-42-991-003
1EFF : 1 1R 1CES ALL 1 11 1 21-26-42 Page 612 May 01/05
R R (3) Remove the clamps (22) and slide the flexible sleeve (20) on the duct (32).
R (4) Remove the attachment screws (26), (30) and the washers (27), (31).
R (5) Carefully remove the ducts (28) and (32).
R R (6) Remove the flexible sleeves (29) and (30) from the ducts (28) and (32).
R (7) Put blanking plugs on the disconnected line ends.
R **ON A/C ALL
Subtask 21-26-42-210-053
B. Make an Inspection of the Internal Structure
(1) Carefully examine the internal structure of the heat exchanger, specially the area with the drain holes.
(2) Make sure that this area has no corrosion, cracks, blocked drain holes, unwanted objects. Clean, if necessary.
(3) With a soft scraper, remove the gaskets (23), (25) and all bonding compound from the heat exchanger and the ducts. Discard the gaskets (23) and (25).
(4) Clean the contact faces of the heat exchanger and the ducts with cleaning agent CLEANING AGENTS (Material No. 11-008).
(5) Make sure that the contact faces of the heat exchanger have no cracks, dents or
(6) Make sure that the inside of the heat exchanger is clear of tools and other items. other damage.
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