28-25-05
ALL ú ú 01 Page 418 ú Sep 28/01
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757 MAINTENANCE MANUAL
(2)
Access Panel
311AL Access Door (Left)
D.
Install the APU Fuel Line and Shroud between the Center Fuel Tank and the APU Firewall
S 424-025
(1)
Put the APU fuel line and shroud through the holes in the structure.
S 434-026
(2)
To install the APU fuel line out and above the center fuel tank (View A, Fig. 405) and at the aft pressure bulkhead (View B, Fig. 405), do the steps that follow:
(a)
Apply petrolatum grease on the new O-ring.
(b)
Install a new O-ring in the groove of the shroud.
(c)
Put the APU fuel line and shroud into the flex fitting.
(d)
Disconnect the flex fitting.
(e)
Connect and tighten the APU fuel line at fitting.
(f)
Apply petrolatum grease on the new O-ring.
(g)
Install the new O-ring in the groove of the flex fitting.
(h)
Connect the flex fitting and torque to 630-770 inch-pounds (71-87 N.m).
(i)
Install the snap ring.
S 434-027
(3)
To install the APU fuel line and shroud at the APU firewall (View C, Fig. 405), do the steps that follow:
(a)
Connect the APU fuel line at the fitting, forward of the bellows.
(b)
Install a new O-ring in the tubing ferrule.
(c)
Put the retaining ring on the ferrule.
(d)
Install the ferrule in the tubing ferrule.
(e)
Install the nut and tighten to a torque of 630-770 inch-pounds (71-87 Nm) on the tubing ferrule to connect the shroud to the bellows.
S 434-028
(4) Install the applicable fittings on the APU fuel line per the Install the Fittings on the Fuel Line procedure.
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28-25-05
ALL ú ú 01 Page 419 ú Jan 28/02
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757 MAINTENANCE MANUAL
S 024-186
(5)
Remove the DO-NOT OPERATE tag from the APU master control switch on the overhead panel, P5.
S 024-187
(6)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:
(a)
On the main power distribution panel, p6: 1) 6E3, APU FUEL VALVE 2) 6H23, L FWD FUEL BOOST PUMP
(b)
On the overhead circuit breaker panel, P11: 1) 11C33, APU DC PUMP
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