12-11-03
ALL ú ú 01 Page 305 ú Jan 28/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
C.
D.
E.
A
757
MAINTENANCE MANUAL
(2)
Adapter, Sump Drain Valve Removal/Installation - B28001-1 Adapter, Main and Surge Tanks - B28001-2 Adapter, Center Tank - B28001-5
(3)
Hose Adapter, Sump Drain - B28002-1References
(1)
AMM 06-41-00/201, Fuselage Access Doors and Panels
(2)
AMM 28-11-05/401, Fuel Sump Drain ValveAccess
(1)
Location Zones 193 Wing to Body - Forward Lower Half (Left) 194 Wing to Body - Forward Lower Half (Right) 541 Main Tank - Rib No. 5 to No. 17 (Left) 543 Surge Tank - Rib No. 21 to No. 23 (Left) 641 Main Tank - Rib No. 5 to No. 17 (Right) 643 Surge Tank - Rib No. 21 to No. 23 (Right)
(2)
Access Panels 193GL Fuel Drain Access Door (Left) 194DR Fuel Drain Access Door (Right)
Procedure
S 653-013
(1) To drain the fuel tank sumps in the main fuel tanks and the surge tanks, do the steps that follow:
(a)
Remove the primary poppet of the sump drain valve
(AMM 28-11-05/401).
(b)
Close the shutoff valve on the sump drain hose.
(c)
Install the sump drain hose adapter in the sump drain valve.
(d)
If it is necessary, install an extension hose or suitable drain connection to the sump drain hose.
(e)
Open the shutoff valve on the sump drain hose.
(f)
Drain the fuel into a suitable container.
(g)
After you drain the fuel, close the shutoff valve.
(h)
Remove the extension hose or drain connection, if installed.
(i)
Remove the sump drain hose.
(j)
Install the poppet valve in the sump drain valve
(AMM 28-11-05/401).
S 653-024
(2) To drain the fuel tank sumps in the center fuel tank, do the steps that follow:
(a)
Open the applicable left or right fuel sump drain door, 193GL or 194DR (AMM 06-41-00/201).
(b)
Disconnect the drain line at the poppet valve of the sump drain valve.
(c)
Remove the sump drain valve (AMM 28-11-05/401).
(d)
Close the shutoff valve on the sump drain hose adapter.
(e)
Install the sump drain hose adapter in the fuel tank sump.
(f)
If it is necessary, install an extension hose or suitable drain connection to the sump drain hose.
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12-11-03
ALL ú ú 01 Page 306 ú Sep 28/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
(g) Drain the fuel into an applicable container.
(h) After you drain the fuel, close the shutoff valve.
(i) After you drain all the fuel, remove the drain hose.
(j) Install the sump drain valve (AMM 28-11-05/401).
(k) Connect the drain line at the poppet valve of the sump drain
valve.
(l) Close the applicable fuel sump drain door, 193GL or 194DR
(AMM 06-41-00/201).
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12-11-03
ALL ú ú 01 Page 307 ú Sep 28/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
APU FUEL LINE SHROUD DRAINING
_____________________________
1. General_______
A. It is necessary to drain the APU fuel line shroud regularly to remove water condensation from the APU fuel line shroud. To remove water you must open the sump drain valve on the APU fuel line shroud. The sump drain valve is between the main gear wheel wells.
B. This procedure contains instructions to drain the shroud for the APU fuel line of water or fuel that is caught in the shroud for the APU fuel line. If there is fuel caught in the shroud there is a leak in the APU fuel line.
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