(a)
Remove the blanking covers from the oil cooler outlet and oil cooler duct.
(b)
Install the oil cooler outlet-duct (Ref. TASK 49-52-41-400-002).
(9)
Connection of the Bleed-Air Duct Elbow (Ref. Fig. 401/TASK 49-11-11-991-006)
(a)
Remove the blanking covers from the openings of the bleed-air duct elbow (3), and the bleed air duct of the APU (1).
(b)
Clean the component interface and/or the adjacent area.
(c)
Do an inspection of the component interface and/or the adjacent area.
(d)
Make sure that mounting flanges of the bleed-air duct elbow (3) is positioned, without forces in the X, Y and Z direction, 0 +2 -2 mm (0.0000 +0.0787 -0.0787 in.) to the APU interface.
NOTE : If necessary adjust the position with the rods.
____
(e)
Put the clamp (2) over the mounting flanges of the bleed-air duct elbow (3) and APU bleed-air duct (1).
(f)
TORQUE the clamp (2) to between 0.4 and 0.5 m.daN (35.39 and
44.24 lbf.in). Subtask 49-11-11-865-067
F. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 1KD, 2KD, 1QC, 2QC, 3QC, 1QF, 2QF, 1WF, 2WF, 3WF, 4WF, 30WF, 1WG.
Subtask 49-11-11-740-053-A
G. BITE test and update of the ECB
(1)
Do the self test of the ECB (Ref. TASK 49-00-00-710-005).
(2)
Update the APU hours and cycles in the ECB. NOTE : This workstep is only necessary if the TSO of installed APU is
____
> 0 and operator wants to monitor TSO.
(a) Use the MCDU to do the update of the APU hours and cycles (Ref. TASK 49-00-00-860-011).
(3) Bleeding of the APU Fuel Line
(a)
Bleed the APU fuel line (Ref. TASK 28-22-00-710-001). Subtask 49-11-11-410-066
H.
Installation and locking of the APU access doors
(1)
If removed install the APU access doors 315AL, 316AR (Ref. TASK 52-41-21-400-001) and (Ref. TASK 52-41-22-400-001).
(2)
Make sure that the access doors 315AL, 316AR are open and locked (Ref. TASK 52-41-00-010-001) to facilitate leak checks during the functional ground test.
Subtask 49-11-11-710-055
J. Operational Test
CAUTION : DO NOT START THE APU WITH ACCESS DOORS 315AL AND 316AR
_______ OPEN/REMOVED. THE APU FIRE EXTINGUISHER SYSTEM IS NOT SUFFICIENT TO EXTINGUISH A FIRE IF THE ACCESS DOORS 315AL AND 316AR ARE OPEN/REMOVED.
CAUTION : OBEY THE SAFETY PRECAUTIONS.
_______
CAUTION : MAKE SURE THAT THE FUEL-FEED SYSTEM DOES NOT HAVE ANY LEAKS.
_______
LEAKS IN THE FUEL-FEED SYSTEM CAN CAUSE A FIRE.
CAUTION : MAKE SURE THAT THE APU OIL RESERVOIR IS FILLED BEFORE YOU START
_______ THE APU. IF YOU OPERATE THE APU WITHOUT OIL, DAMAGE WILL OCCUR.
(1) Do the Operational test of the APU (Ref. TASK 49-00-00-710-008), (Ref. TASK 49-00-00-790-005).
NOTE : Do the ground air-preconditioning with the APU for a minimum
____ of 10 minutes during the first run of an APU after its installation. If you smell fumes in the cockpit and/or passenger compartment, remove the contamination from the air conditioning system (Ref. TASK 21-00-00-615-001), (Ref. TASK 21-00-00-615-002) and (Ref. TASK 21-00-00-100-001).
Subtask 49-11-11-865-069
K. Open, safety and tag this(these) circuit breaker(s):
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------121VU APU/APU/CTL 2KD L42 121VU APU/ECB/SPLY 1KD L41
Subtask 49-11-11-210-063
L. Inspection of the APU after shutdown
WARNING : DO NOT TOUCH THE APU UNTIL IT IS SUFFICIENTLY COOL TO PREVENT
_______
BURNS WHEN YOU DO THE MAINTENANCE TASK(S).
(1) Carefully examine the APU, the vent and drain valve connections and the drain lines for fuel and/or oil leakage (Ref. TASK 49-00-00-790-002).
NOTE : Leaks are not permitted.
____
(2)
Do a check of the magnetic drain plug for unwanted metal (Ref. TASK 49-91-42-200-003).
(3)
Do a check of the APU oil level on the oil sight glass. If necessary add oil until the oil level reaches the full mark. (Ref. TASK 49-90-00-600-004).
5. Close-up
________
Subtask 49-11-11-410-061
A. Close Access
(1)
If removed install the APU access doors 315AL, 316AR (Ref. TASK 52-41-21-400-001) and (Ref. TASK 52-41-22-400-001).
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