YES NO
11 DO THE CIT SENSOR TEST
53 REPLACE THE CIT SENSOR
(AMM 71-00-00/501, TEST 11). (AMM 73-21-02/401).
IS THE CIT SENSOR SERVICE-ABLE?
MOTOR (AMM 75-32-02/401).
IF THE PROBLEM CONTINUES, REPLACE THE MEC (AMM 73-21-01/ 401).
Surge (Stall) During Steady-State or Transient Operation
at or above Idle
Figure 101 (Sheet 3)
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
POWER PLANT - TROUBLE SHOOTING (ENGINE OIL)
___________________________________________
1. General_______
A. Oil indicating system trouble shooting should be performed prior to engine oil system trouble shooting if indicated fault is not substantiated by other engine and oil system instrumentation and trouble symptoms. If indicating system fault is not likely by virtue of supporting instrumentation, a trouble chart is provided to isolate and correct the fault.
2. Trouble Symptom Listing_______________________
Trouble Symptom_______________ Begin Trouble Shooting High Oil Consumption Fig. 101 Block 1 Low or No Oil Quantity Fig. 101 Block 1 High Oil Quantity Fig. 102 Block 1 Low or No Oil Pressure Fig. 103 Block 1 High Oil Pressure Fig. 104 Block 4 High Oil Temperature Fig. 105 Block 1 Oil Filter Bypass Light Illuminated Fig. 106 Block 1 Oil Filter Clog Indicated Fig. 107 Block 1
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A / /
CFM56 ENGINES
737-300/400/500/ /
MAINTENANCE MANUAL ////////////////////////
QUANTITY TION/LOW OR NO OIL HIGH OIL CONSUMP- ENGINE OPERATION PREREQUISITES
NO
NOYES
37 PERFORM DRIVE SHAFT ROTA-56 REPLACE ENGINE (71-00-02). TION CHECK (79-21-01 I/C). DOES BREAKAWAY TORQUE OF SHAFT EXCEED 10 POUND-INCHES
(1.14 N.M.)?
YES
39 REPLACE LUBRICATION UNIT 57 REPLACE ENGINE (71-00-02). SEE SHEET 2
(79-21-01). (BLOCK 5) CLOSE FAN COWL PANELS NO
(71-11-02 MP).
58 CONTINUE ENGINE IN OPERATE ENGINE AT MPA AND SERVICE.
ALLOW TO STABILIZE (71-00-00
SEE SHEET 2 A/T, TEST NO. 5), SHUT DOWN
(BLOCK 5) AND CHECK MCD.
IS ABNORMAL DEBRIS PRESENT?
High Oil Consumption/Low or No Oil Quantity Figure 101 (Sheet 1)
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
FROM SHEET 1 (BLOCKS 1 AND 33)
SEE SHEET 3 (BLOCK 14)
High Oil Consumption/Low or No Oil Quantity
Figure 101 (Sheet 2)
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
FROM SHEET 2 (BLOCK 13)
PRESENT?
NO
YES
19 EXAMINE THE AGB FOR EXCESS
OIL (AMM 71-00-59/101,
FIG. 112.
IS OIL QUANTITY GREATER THAN 1 QUART (1 LITER)?
SEE SHEET 4 (BLOCK 23)
High Oil Consumption/Low or No Oil Quantity
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