YES THERMOMETER |5`C?
NO
YES
17 CHECK OIL TEMPERATURE 28 CHECK AND REPAIR CIRCUIT BULB RESISTANCE (71-00-59, BETWEEN OIL TEMPERATURE BULB FIG. 111).AND OIL TEMPERATURE INDICATOR
DO TEMPERATURE VALUES (WM 79-33-01). AGREE |5`C?
NO
30 REPLACE OIL TEMPERATURE BULB (79-34-01).
Oil Temperature Indicating System Problems
Figure 104 (Sheet 1)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH OIL TEMPERATURE ú
71-00-55
INDICATORS ú
ú C01 Page 111
ú Jul 15/93
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
OIL TEMPERATURE PREREQUISITES:
INDICATING SYSTEM 28V AC POWER AVAILABLE
PROBLEMS CB'S IN: 6-2-A2 AND 6-2-A3
NO
1 PERFORM SECONDARY ENGINE
20 REPLACE SECONDARY ENGINE
AND HYDRAULICS DISPLAY BITE AND HYDRAULICS DISPLAY UNIT
TEST (31-42-02).N183 (31-42-02).
DOES DISPLAY PASS TEST?
YES NO
3 IS OIL TEMPERATURE DISPLAY
OPERATING (POINTER READS ABOVE
-50`C)?
YES NO YES5 CHECK OIL TEMPERATURE
22 CHECK AND REPAIR CIRCUIT (71-00-59, FIG. 110).
BETWEEN OIL TEMPERATURE BULB DOES DISPLAY AGREE WITH
AND SECONDARY ENGINE AND
THERMOMETER |5`C?
HYDRAULICS DISPLAY (WM 79-33-01).
YES
24 REPLACE OIL TEMPERATURE BULB (79-34-01).
Oil Temperature Indicating System Problems
Figure 104 (Sheet 2)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH SECONDARY ENGINE ú
71-00-55
AND HYDRAULICS DISPLAY ú ú C01 Page 112 ú Jul 15/93
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
PREREQUISITES:
28V DC POWER AVAILABLE LOW OIL PRESSURE WARNING LAMP CHECK OK WARNING SYSTEM
CB'S IN: 6-3-B13,6-3-B14,6-3-B15,6-3-C12,6-3-C13, PROBLEMS 6-3-C14,6-3-C15,6-3-D13,6-3-D14 AND 6-3-D15
PLUG AT LOW OIL PRESSURE WARNING SWITCH (FIG. 101) AND OBSERVE LOW OIL PRESS LIGHT.
DOES LIGHT EXTINGUISH?
YES
NO
NO
8 GRADUALLY DECREASE AIR
PRESSURE AND OBSERVE LOW OIL
PRESSURE LIGHT.
DOES LIGHT ILLUMINATE AT AN AIR PRESSURE OF 12-13 PSI?
YES
BETWEEN LOW OIL PRESSURE WARNING LIGHT AND LOW OIL PRESSURE WARNING SWITCH (WM 79-34-11).
Low Oil Pressure Warning System Problems
Figure 105
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
71-00-55
ALL ú ú C01 Page 113 ú Jul 15/93
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////
A / /
OIL FILTER BYPASS WARNING SYSTEM PROBLEMS
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
PREREQUISITES: 28V DC POWER AVAILABLE WARNING LAMP CHECK OK
CB'S IN: 6-3-B13,6-3-B14,6-3-B15,6-3-C12,6-3-C13, 6-3-C14,6-3-C15,6-3-D13,6-3-D14,6-3-D15
Oil Filter Bypass Warning System Problems
Figure 106
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
71-00-55
ALL ú ú C01 Page 114 ú Jul 15/93
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
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