(2)
On the panel 25VU, make sure that the APU MASTER SW p/bsw 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 315AL and 316AR are open (Ref. TASK 52-41-00-010-001).
(7)
Make sure that the LIGHT SW is set to the ON position. Subtask 49-52-41-865-057
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
R EFF : 001-049, 101-105, 107-107, 151-199, 49-52-41Page 406 201-210, Config-2 Aug 01/05
CES 4. Procedure
_________
(Ref. Fig. 401/TASK 49-52-41-991-003) Subtask 49-52-41-210-055
A. Make an inspection of the bellows (2), the pipe (4) and the support for damage, chafing marks, dents or cracks. Replace the damaged items.
(1)
Make an inspection of the duct seal on the outlet-duct (16) at the APU access door 315AL. Replace the seal, if necessary (Ref. TASK 52-41-21-400-001).
(2)
Make an inspection of the stiffeners (10).
(3)
If the stiffeners are damaged, do a structural repair. Subtask 49-52-41-420-054
B.
Installation of the Oil-Cooler Outlet-Duct
(1)
Remove the protective cover from the oil cooler outlet.
(2)
Put the pipe (4) on the support and close the clamps (5). Do not fully tighten the clamps (5) at this time.
(3)
Put the bellows (2) on to the pipe (4) and install the clamp (3). Do not fully tighten the clamp (3) at this time.
(4)
Apply SPECIAL MATERIALS (Material No. 05-002) to all mating surfaces and to the bolt (6), the washers (7) and (8), and the nut (9).
(5)
Put the oil-cooler outlet-duct in position and install the screws (6), the washers (7), (8) and the nuts (9). Do not fully tighten the nuts (5) at this time.
(6)
Connect the bellows (2) to the oil cooler outlet and install 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)
TORQUE the nuts (9) to to 0.45 m.daN (39.82 lbf.in).
R EFF : 001-049, 101-105, 107-107, 151-199, 49-52-41Page 407 201-210, Config-2 Aug 01/05
CES
(10) 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.).
____
(11)
Tighten the clamps (5) and the clamp (3).
(12)
Open the APU access door 315AL.
(13)
Connect the bonding strap (15) to the structure with the bolt (13), the washers (11), (14) and the nut (12) (Ref. TASK 20-28-00-912-004).
Subtask 49-52-41-865-058
C. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 1KD, 2KD.
Subtask 49-52-41-710-054
D. Test
(1)
Do the operational test of the APU (Ref. TASK 49-00-00-710-010).
(2)
Operate the APU for min. five minutes and examine the joints of the duct for leaks.
NOTE : Leaks are not permitted.
____
________
5. Close-up
Subtask 49-52-41-410-055
A. Close Access
(1)
Make sure that the work area is clean and clear of tool(s) and other items.
(2)
Set the LIGHT control SW to the OFF position.
(3)
Close the APU access door 315AL (Ref. TASK 52-41-00-410-001).
(4)
Remove the access platform(s).
R EFF : 001-049, 101-105, 107-107, 151-199, 49-52-41Page 408 201-210, Config-2 Aug 01/05
CES Subtask 49-52-41-860-058
B. Aircraft Maintenance Configuration
(1)
Pressurize the reservoirs of the hydraulic systems. (Ref. TASK 29-14-00-614-002).
(2)
De-energize the ground service network
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