(2)
AMM 28-25-05/401, APU Fuel Line and Shroud
C. Access
(1) Location Zones
149 Aft Section of Keel beam
D. Procedure
S 483-002
(1)
Put the probe end of the fuel sampling receptacle against the bottom of the primary poppet on the sump drain valve.
S 483-003
(2)
Push the fuel sampling receptacle up into the poppet to catch any fuel or water from the fuel line shroud.
S 213-004
(3)
If the sump drain valve is frozen, refer to Cold Weather Maintenance (AMM 12-33-01/301).
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757
MAINTENANCE MANUAL
A
B
APU Fuel Line Shroud Sump Drain Valve
Figure 301
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MAINTENANCE MANUAL
S 083-005
(4)
When the flow of liquid stops, remove the fuel sampling receptacle and let the primary poppet on the sump drain valve close.
S 773-007
(5)
If there is water and fuel mixed together in the sample, let the sample of water and fuel separate so you can measure the quantity of fuel as follows:
(a)
If there is more than 1 liter of fuel in the sample, you must repair the leak in the APU fuel line (AMM 28-25-05/401).
(b)
If there is less than one liter of fuel, repeat the check after 24 hours to see if you get more than 2 ounces of fuel.
(c)
If there is more than 2 ounces of fuel in the sample after 24 hours, you must repair the leak in the APU fuel line (AMM 28-25-05/401).
(d)
If there is less than 2 ounces of fuel in the sample after 24 hours, you can return the airplane to service without repair.
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757 MAINTENANCE MANUAL
HYDRAULIC SYSTEMS - SERVICING
_____________________________
1. General
_______
A. This procedure has three tasks. The first task does a check of the fluid level in the hydraulic reservoirs. The second task fills the hydraulic reservoirs with the manual procedure. The third task fills the hydraulic reservoirs with the pressure procedure.
NOTE: To get the correct fluid level in the reservoirs, you must fill
____
the reservoirs in these conditions:
-
all landing gear in the down position
-
all landing gear doors closed
-the steering and flight controls in the neutral position.
When you fill the reservoir in the right system, the pressure gage for the brake accumulator must show at least 2500 psi.
B. You can use the sight gage on each reservoir to do a check that the indicating system for the hydraulic quantity shows the level accurately.
TASK 12-12-01-703-053
2. Fluid Level Check for the Hydraulic Reservoirs
______________________________________________
A. References
(1)
AMM 06-41-00/201, Fuselage Access Doors and Panels
(2)
AMM 24-22-00/201, Electrical Power - Control
(3)
AMM 29-11-00/201, Main (Left, Right, and Center) Hydraulic Systems
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