(a)
 The struts (6) are correctly bonded and attached to the housing (3),

 -
the adhesive bead around the struts is in a good condition,

 -
the rivets, where fitted, are not missing or have not become loose.

 (b)
 The outer ring (2) is correctly bonded and attached to the housing (3).

 (c)
 The outlet flange (4) is correctly bonded and attached to the housing (3),

 -the adhesive bead between the outlet flange and the housing is in a good condition.

 (d)
 The inlet flange (1) is correctly bonded and attached to the housing (3).

 (e)
 The ejector (10) is correctly bonded to the inner part of the housing (3).

 (2)
 Condition of the lip-seal

 NOTE : This is not applicable to plenum chambers with P/N
____
 1816A0000-01.

 -Make sure that the lip seal (11) is in a good condition.
 (3) Where fitted make sure that:
 (a) The access panel (9) and the seal (8) are in a good condition,
 -the locking devices (5) and the locking pins (7) are in a good condition.
 NOTE : If any of the parts are broken or not attached, or if
____ there is any other damage, then you must install a new plenum chamber.
R 1EFF : 151-199, 401-499, 1 21-52-00Page 608 1 1 Aug 01/05 1 1 1CES 1 **ON A/C ALL

 5. Close-up
________ Subtask 21-52-00-410-050
 A. Close Access
 (1)
 Install the plenum chamber (Ref. TASK 21-52-22-400-001).

 (2)
 Install the heat exchanger unit (Ref. TASK 21-52-24-400-001).

 (3)
 Make sure that the work area is clean and clear of tool(s) and other items.

 (4)
 Install the access panel/s (Ref. TASK 53-35-13-400-002).

 (a)
 FOR 10HM5

 -191KB,

 (b)
 FOR 11HM5

 -192KB. Subtask 21-52-00-865-054
 B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): FOR 10HM5 1HH, 2HH, 3HH, 4HH. FOR 11HM5 21HH, 22HH, 23HH, 24HH.
 Subtask 21-52-00-862-051
 C. De-energize the aircraft electrical circuits (Ref. TASK 24-41-00-862-002).
 1EFF : ALL 1 21-52-00Page 609 1 1 Aug 01/05R 1 1 1CES 1

 TASK 21-52-00-200-002
 Detailed Visual Inspection of Pipe-Assemblies between the Heat Exchanger Unit, R the Bypass Valve, the Anti-Ice Valve (if installed) and the Air Cycle Machine
 WARNING : MAKE SURE THAT THERE IS A GOOD FLOW OF AIR THROUGH THE WORK AREA WHEN
_______ YOU USE SPECIAL MATERIALS. IF YOU GET ONE OF THESE MATERIALS ON YOUR SKIN, IN YOUR MOUTH OR IN YOUR EYES : -FLUSH IT AWAY WITH A FLOW OF CLEAN WATER FOR BETWEEN 10 AND 15 MINUTES. -GET IMMEDIATE MEDICAL AID IF IRRITATION OCCURS. DO NOT BREATHE THE FUMES FROM THE MATERIAL. DO NOT SMOKE WHEN YOU USE THE MATERIAL. DO NOT USE THE MATERIAL NEAR A FLAME, SPARKS OR SOURCES OF HEAT. THESE MATERIALS ARE DANGEROUS : THEY ARE POISONOUS, FLAMMABLE AND SKIN IRRITANTS.
 1. Reason for the Job
__________________
 Self Explanatory
 2. Job Set-up Information
______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific abrasive paper
 No specific glass-fibre brush
 No specific lint-free cloth
 No specific masking tape
 No specific scotch-tape No. 250

 B. Consumable Materials
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
Material No. 11-003  USA ASTM D 740
 METHYL-ETHYL-KETONE (Ref. 20-31-00)

 Material No. 13-002  USA MIL-C-5541 MIL-C-81706 CLASS I/A
 CHEMICAL CONVERSION COATING YELLOW ALUMINUM
 (Ref. 20-31-00)

 C. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE  DESIGNATION
 -------------------------------------------------------------------------------
RR  21-52-23-000-001 21-52-23-000-002 21-52-23-000-003 21-52-23-400-001 21-52-23-400-002 21-52-23-400-003 CMM 215236 CMM 215238 CMM 215240 NTM 518000 21-52-00-991-006  Removal of the Pipe Assembly between the Main Heat Exchanger and the Air Cycle MachineRemoval of the Pipe Assembly between the Anti-Ice Valve (if installed), the Bypass Valve and the Air Cycle MachineRemoval of the Pipe Assembly between the Anti-Ice Valve (if installed) and the Bypass Air Duct of the Primary Heat ExchangerInstallation of the Pipe Assembly between the Main Heat Exchanger and the Air Cycle MachineInstallation of the Pipe Assembly between the Anti-Ice Valve (if installed), the Bypass Valve and the Air Cycle MachineInstallation of the Pipe Assembly between the Anti-Ice Valve (if installed) and the Bypass Air Duct Duct of the Primary Heat ExchangerFig. 602 
　
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