(3)
Make sure that there is a warning notice in the cockpit to tell persons not to start the APU.
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(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 SW 11LJ is set to the ON position. Subtask 49-16-45-865-057
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
4. Procedure
_________
(Ref. Fig. 401/TASK 49-16-45-991-007, 402/TASK 49-16-45-991-009) Subtask 49-16-45-220-052
A. Preparation for Installation
(1)
Clean the component interface and/or the adjacent area.
(2)
Do an inspection of the component interface and/or the adjacent area.
(3)
Make on inspection for damage of the inner and outer surface of the diffuser (20) and elbow assembly (26). Examine for damage and pollution the guide vanes in the elbow assembly (26). Replace or clean them as necessary.
(4)
Make an inspection of the seal (1) for damage.
If necessary, replace the seal as follows:
(a)
Remove the nuts (4), the washers (3) and the screws (2).
(b)
Remove the strips (5) and the seal (1) from the elbow assembly (26).
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APU Plenum/Intake Elbow Interface - Adjustment
Figure 402/TASK 49-16-45-991-009
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(c)
Apply SPECIAL MATERIALS (Material No. 05-002) to the screws (2), the washers (3) and the nuts (4).
(d)
Align the seal (1) and the strips (5) on the elbow assembly (26).
(e)
Install the screws (2), the washers (3) and the nuts (4).
(5)
Make sure that the basic adjustment F and J of the eye-bolts (8 and 14) is 23.1 mm (0.9094 in.).
(6)
Make sure that the basic adjustment G is 18.0 mm (0.7086 in.). NOTE : You can measure the dimension G from the edge of the APU
____ compartment door (view C) to the center of the eye-bolt and then add to the measured value 3mm. The AD-line is the aircraft datum line (Y=0).
(7)
Make sure the basic adjustement H is 2.5 mm (0.0984 in.) NOTE : You can measure the position of the eye-bolt (dimension A),
____ from the sidewall of the Air-intake-duct elbow (view D) to the eye-bolt center with the measuring tape, aft looking forward from the left side. You can do the measurement again from the opposite side of the elbow (dimension B) to get a reference value, the difference of the two measured values must be 5mm. The eye-bolt position is 2.5mm out of the center line of the elbow. The AD-line is the aircraft datum line (Y=0).
NOTE : The worksteps 6 and 7 are only necessary if a new eye-bolt or
____ the air-intake duct with elbow should be installed.
Subtask 49-16-45-420-055
B. Installation of the Air Intake Deffuser and Elbow
(1)
Put the diffuser (20) and elbow assembly (26) in position. Make sure that the eye bolt (8) and the fitting (9) are engaged.
(2)
Install the bolt (15), the washer (10) and the castle nut (12). Do not fully tighten the nut at this time.
(3)
Make sure that the specified length of the tie-rod (22) is 311.5 mm (12.2637 in.). Adjust if necessary.
(4)
After adjustment put the eye-end fittings in line.
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(5)
TORQUE the locknuts (7) and (13) to between 0.5 and 0.7 m.daN (44.24 and 61.94 lbf.in) and safety with MISCELLANEOUS (Material No. 19-010).
(6)
Put the tie-rod (22) into the fitting and install the bolt (21), the washer (23) and the castle nut (24). Do not fully tighten the nut at this time.
Subtask 49-16-45-820-056
C. Adjustment
(1)
Close the access door 316AR (Ref. TASK 52-41-00-010-001).
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