S 378-010-C00
(6)
Permit the primer to dry for 30 to 45 minutes.
S 398-007-C00
(7)
Prepare a sufficient quantity of silicone for the repair.
(a)
Add 0.5 percent of DBT catalyst to the silicone.
(b)
Fully mix it.
S 398-008-C00
(8) Apply the silicone with a spatula to a minimum thickness of
0.04 inch (1.0 mm).
S 398-009-C00
(9)
Let the silicone cure in the air for 8-16 hours at room temperature, or cure at 195-220°F (90-105°C) for 4 hours.
S 418-009-C00
(10)
Close the right fan cowl panel (AMM 71-11-02/201).
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79-11-01
ALL ú ú C01 Page 802 ú Jul 15/96
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
OIL DISTRIBUTION - DESCRIPTION AND OPERATION
____________________________________________
1. General
_______
A. The oil distribution system consists of the supply system and the scavenge system. The supply system provides oil for lubrication and cooling to the main bearings, radial driveshaft bearings, and transfer and accessory gearboxes (TGB/AGB). The scavenge system recovers the oil from the forward and aft sumps and the AGB/TGB sump for filtering, cooling and recirculation.
2. Lubrication Unit (Fig. 1)
________________
A. The lubrication unit is located on the AGB near the bottom of the fan case on the left side. It contains the following:
(1)
Four positive displacement pumps (three scavenge pumps and the supply pump).
(2)
Oil supply filter, check valve and bypass valve with clogging indicator.
(3)
Pressure relief valve located on the oil supply pump discharge side of the unit.
(4)
Three magnetic chip detectors (MCD).
3. Main Oil/Fuel Heat Exchanger (Fig. 1)
____________________________
A. The main oil/fuel heat exchanger is attached to the fuel pump and the servo fuel heater. It is located at the 9 o'clock position on the fan case. The main oil/fuel heat exchanger (Fig. 2) is a tubular type, consisting of the housing, removable core and core access cover.
B. Both fuel and oil portions of the oil/fuel heat exchanger contain bypass valves. This permits fuel and/or oil to bypass the core in the event of a blockage. A drain port is also provided to check for possible fuel leaks from the core ends into the core housing.
4. Scavenge Oil Filter (Fig. 1)
___________________
A. The scavenge oil filter is installed in series between the scavenge pump outlet and the main oil/fuel heat exchanger. It is located just above the lubrication unit and consists of a replaceable filter cartridge, a bypass valve with clogging indicator and a non-return valve.
5. Oil Supply Filter (Fig. 1)
_________________
A. The oil supply filter is housed in the lubrication unit. It contains a cleanable filter element, pressure relief valve and bypass valve with clogging indicator.
6. Clogging Indicators (Fig. 1)
___________________
A. The main oil filter and oil scavenge filter are both equipped with clogging indicators. They provide a visual indication of impending filter bypass.
7. Magnetic Chip Detector (Fig. 1)
______________________
A. Magnetic chip detectors are located at the inlet to the scavenge pumps. They trap particulates before entering the lubrication unit.
B. Three magnetic chip detectors are used on the lubrication unit, one on the inlet of each scavenge pump. Each has a removable magnetic plug and a scavenge screen.
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