S 024-022
(3)
Remove the crossover duct:
(a)
Remove the fire loop bracket from the crossover duct.
(b)
Remove the two clamps from the crossover duct.
(c)
Remove the crossover duct and the two gaskets.
S 024-023
(4) Remove the cooling fan:
(a)
Remove the inlet screen for the cooling fan.
(b)
Remove the bolts and washers that attach the cooling fan to the gearbox assembly.
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APU Cooling Fan - Installation
Figure 401
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G70118
CAUTION: REMOVE THE COOLING FAN SLOWLY OUT OF THE GEARBOX ASSEMBLY
_______ IN A STRAIGHT LINE TO NOT DAMAGE THE COOLING FAN OR GEARCASE SPLINES.
(c)
Carefully remove the cooling fan in a straight line.
(d)
Remove the two packings.
1) Discard the two packings.
TASK 49-51-11-404-028
3. Cooling Air Fan Installation (Fig. 401)
____________________________
A. Consumable Materials
(1) D00129 Petrolatum, AN-P-51
B. References
(1) AMM 49-11-00/401, APU Power Plant
C. Access
(1)
Location Zones
101 Control Cabin, LH
205 Electronic Compartment
703 APU Compartment
(2)
Access Panels
1201 Electronic Equipment Access Door
3804 APU Cowl Door
D. Procedure
S 424-024
(1) Install the cooling fan:
(a)
Apply a thin film of petrolatum to the two new packings.
(b)
Install the two new packings on the cooling fan.
(c)
Carefully install the cooling fan into the gearbox in a straight line to align the splines.
(d)
Install the washers and bolts that attach the cooling fan to the APU gearbox. 1) Tighten the bolts to 50-70 pound-inches (5.6-7.9
newton-meters).
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(e) Install the inlet screen on the cooling fan.
(2) S 424-030Install the crossover duct: (a) Put the two gaskets in the crossover duct. (b) Put the crossover duct on the cooling fan and oil cooler. (c) Install the two clamps on the crossover duct. (d) Install the fire loop bracket on the crossover duct.
(3) S 424-034Install the APU power plant (AMM 49-11-00/401).
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COOLING AIR SHUTOFF VALVE - REMOVAL/INSTALLATION
________________________________________________
1. General
_______
A. This procedure contains the removal and the installation tasks for the
cooling air shutoff valve. During this procedure, the valve is referred
to as the shutoff valve.
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