-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
49-00-00-860-006 APU Shutdown by External Power (APS 3200) 52-41-00-010-001 Open the APU Doors for Access 52-41-00-410-001 Close the APU Doors after Access
3. Job Set-up
__________
Subtask 49-52-41-860-050
A. Aircraft Maintenance Configuration
(1)
Make sure that the aircraft electrical circuits are energized (Ref. TASK 24-41-00-861-002).
(2)
On the panel 25VU, make sure that the APU MASTER SW pushbutton switch is off.
(3)
Make sure that there is a warning notice in the cockpit to tell persons not to start the APU.
(4)
Make sure that hydraulic systems are depressurized
(Ref. TASK 29-00-00-864-001).
(5)
Make sure that the access platform is in position below the APU compartment.
(6)
Make sure that the APU access doors are open (Ref. TASK 52-41-00-010-001).
(7)
Make sure that the LIGHT control switch 11LJ is set to the on position.
Subtask 49-52-41-865-054
B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------121VU APU/APU/CTL 2KD L42 121VU APU/ECB/SPLY 1KD L41
4. Procedure
_________
Subtask 49-52-41-210-054
A. Inspection of the Outlet Duct Assembly.
(1)
Make an inspection of the bellow (2), the pipe (4) and the support for damage, chafing marks, dents or cracks. Replace the damaged items.
(2)
Make an inspection of the duct seal on the elbow for damage. Replace the seal, if necessary.
(3)
Make an inspection of the stiffeners (10) and their fittings for damage.
(4)
If the stiffeners are damaged, do a structural repair.
Subtask 49-52-41-420-052
B. Installation of the Oil Cooler Outlet Duct.
(1)
Put the pipe (4) on the support and close the clamps (5). Do not fully tighten the clamps (5) at this time.
(2)
Remove the protective cover from the oiler cooler outlet.
(3)
Move the bellows (2) on to the pipe (4) and install the clamp (3). Do not fully tighten the clamp (3) at this time.
(4)
Protective Treatment
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.
(a) Apply SPECIAL MATERIALS (Material No. 05-002) to all mating surfaces and to the bolts (6), the washers (7) and (8) and the nuts (9). Do not apply ZINC CHROMATE PUTTY to the bonding strap (15).
(5)
Put the oil-cooler outlet-duct assembly in position and install the bolts (6), the washers (8) and the nuts (9). Do not fully torque the nuts (9) at this time.
(6)
Connect the bellows (2) to the oil cooler outlet with the clamp (1).
(7)
TORQUE the clamp (1) to between 0.4 and 0.5 m.daN (35.39 and 44.24 lbf.in).
(8)
Close the APU access door 315AL.
(9)
Install the pipe (4) on the elbow (2) with the clamp (3).
(10)
TORQUE the nuts (9) to 0.45 m.daN (39.82 lbf.in).
(11)
Adjust the pipe (4) to get a precompression of between 1.3 mm (0.0511 in.) and 1.7 mm (0.0669 in.) of the seal between the flanges of the pipe (4) and the outlet duct (16) at the APU access door 315AL.
NOTE : The adjustment range C is 10 mm (0.3937 in.).
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