EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
71-21-03
ALL ú ú C02 Page 405 ú Mar 12/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
ENGINE VENTS AND DRAINS - DESCRIPTION AND OPERATION
___________________________________________________
1. General_______
A. The engine vents and drains system collects and discharges fluid leakage overboard through the starter air discharge duct fitting and a drain hole located at the approximate bottom centerline of the right fan cowl panel.
B. There are 18 drains in the system that you can examine. Some of these drains are in the front drain system or the rear drain system.
C. In addition, there are drains near the thrust reverser latches, and two fan case drains.
D. The engine vent and drain system connects to the strut vent and drain system to discharge overboard all fluids that collect in the service disconnect box.
2. Front Drain System (Fig. 1)__________________
A. The front drain system collects and discharges drain fluids overboard through a combination drain hole/scupper manufactured into the right fan cowl panel.
B. The forward drain system provides overboard discharge for these drain lines:
~.......................................................................... | DRAIN NUMBER | DRAIN DESCRIPTION | ............................................................................ | (1) | CSD/VSCF Seal - AGB Pad Seal Drain | ............................................................................ | (2) | Hydraulic Pump Pad Drain | ............................................................................ | (3) | CSD/Generator Interface Pad Drain (Engines with CSD) | ............................................................................ | (4) | Oil Tank Scupper Drain | 2.................…........................................................1
3. Rear Drain System (Fig. 2)_________________
A. The rear drain system collects drain fluids in a scupper in the starter air discharge duct fitting.
(1)
The starter air discharge duct fitting is an aluminum alloy casting bolted to the inside of the right fan cowl panel.
B.
As the fluid level rises, the drain fluids pass through five holes drilled through a flange, and then are discharged overboard through two combination drain hole/scuppers.
C.
The rear drain system provides overboard discharge for these drain lines:
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
71-71-00
ALL ú ú C03 Page 1 ú Mar 12/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
AFT SUMP DRAIN
SEE B
SEE A
STARTER AIR
DISCHARGE
DUCT FITTING
AFT DRAIN HOLE
(2 LOCATIONS)
FORWARD RIGHT FAN
FWD DRAIN HOLE COWL PANEL
A
Front Engine Vents and Drains Location
Figure 1 (Sheet 1)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
71-71-00
ALL ú ú C01 Page 2 ú Nov 15/96
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
3. CSD/GENERATOR
INTERFACE PAD DRAIN
(ENGINES WITH CSD)
2. HYDRAULIC PUMP PAD DRAIN
4. OIL TANK SCUPPER DRAIN
1. CSD/VSCF SEAL-
AGB PAD SEAL DRAIN
FWD
FRONT DRAIN SYSTEM
B
Front Engine Vents and Drains Location 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：737-300 400 500 AMM 飞机维护手册 动力装置 POWER PLANT 2(156)
