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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
FORWARD
STARTER AIR CONDENSATION DRAIN
DRAIN HOLE
RIGHT FAN DISCHARGE DUCT HOLE SCUPPER (2 PLACES)
SCUPPER
External Engine Vents and Drains Inspection
Figure 602
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
SEE B
SEE A
FRONT DRAINSTARTER AIR
PLACARD DISCHARGE DUCT FITTING
FORWARD RIGHT FAN FWD DRAIN HOLE COWL PANEL
A
Front Drain System Inspection Figure 603 (Sheet 1)
AFT DRAIN HOLE (2 LOCATIONS)
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
DRAIN
ALLOWABLE LEAKAGE
NO.
DRAIN/SOURCE FLUID CORRECTIVE ACTION
THRESHOLD SERVICABLE LIMIT LIMIT
1
CSD/VSCF SEAL-AGB PAD SEAL DRAIN - USE THE LIMITS FOR THE APPLICABLE SOURCE.
CSD/VSCF SEAL
OIL DRAIN SOURCE
AGB PAD
OIL DRAIN SOURCE
2 HYDRAULIC PUMP OIL PAD HYDRAULIC FLUID
3 CSD/GENERATOR OIL INTERFACE PAD
(ENGINES WITH
CSD)
4 OIL TANK SCUPPER OIL
3. CSD/GENERATOR INTERFACE PAD DRAIN (ENGINES WITH CSD)
1. CSD/VSCF SEAL- AGB PAD SEAL DRAIN
NONE ALLOWED
7 ML/HR
20 ML/HR
(1 CC/9 MIN)
(1 CC/3 MIN)
(2 DROPS/MIN)
(7 DROPS/MIN)
7 ML/HR
20 ML/HR
(1 CC/9 MIN)
(1 CC/3 MIN)
(2 DROPS/MIN)
(7 DROPS/MIN)
EXAMINE THE CSD/VSCF OIL LEVEL. IF LOW OR REQUIRED RECENT REPLENISHMENT, REPLACE THE CSD/VSCF (AMM 24-11-11/ 401).
REPLACE THE AGB SEAL (AMM 72-60-00/201).
REPLACE THE AGB SEAL (AMM 72-60-00/201).
REFER TO 29-00-00/601 AND PERFORM LEAKAGE CHECK. 1 CC/HR
2 CC/HR REPLACE THE CSD
(1 DROP/3 MIN) (1 DROP/1.5 MIN) (AMM 24-11-11/401).
SERVICING SPILLAGE PREVENT SPILLAGE DURING
ONLY SERVICING.
2. HYDRAULIC PUMP PAD DRAIN
4. OIL TANK SCUPPER DRAIN
FWD
B
NOTE:LEAKAGE RATES IN DROPS PER MINUTE ARE BASED ON APPROXIMATELY 20 DROPS PER CUBIC CENTIMETER (CC). FURTHER INVESTIGATION IS RECOMMENDED DURING AN ENGINE RUN WHEN THRESHOLD LIMIT IS EXCEEDED.
____DRAIN NUMBERS SHOWN ARE THE PLACARD DRAIN NUMBERSNOTE:
Front Drain System Inspection
Figure 603 (Sheet 2)
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
SEE A SEE B
STARTER AIR DISCHARGE DUCT FITTING AFT DRAIN HOLE (2 LOCATIONS)
REAR DRAIN PLACARDS
PLACARD REAR DRAIN
FWD DRAIN HOLE FORWARD COWL PANELRIGHT FAN A
NOTE:____ Rear Drain System Inspection Figure 604 (Sheet 1) DRAIN NUMBERS SHOWN ARE THE PLACARD DRAIN NUMBERS
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