EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 71-00-55
 ALL  ú ú C02 Page 105 ú Nov 15/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
PREREQUISITES: 115V AC POWER AVAILABLE
OIL QUANTITY
ENGINE OIL TANK FULL
INDICATING SYSTEM
CB'S IN: 6-2-D5 AND 6-2-D7
PROBLEMS

Oil Quantity Indicating System Problems
Figure 102 (Sheet 1)

EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH OIL QUANTITY ú

 71-00-55
 INDICATORS  ú
 ú  C02  Page 106
 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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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 ////////////////////////
FROM SHEET 1
(BLOCK 3)
YES NO (POINTER FLUCTUATES)5

DRAIN ENGINE OIL TANK
(12-13-11) WHILE OBSERVING
OIL QUANTITY INDICATOR.

NO
DOES INDICATOR POINTER
DESCEND SMOOTHLY TO ZERO?

30 ADJUST OIL QUANTITY INDI-

YES
(POINTER DOES NOT GO TO 0) CATOR (79-31-00 A/T).
IF INDICATOR CANNOT BE
7 REPLENISH OIL TANK ADJUSTED TO PROPER READING,
(12-13-11). OIL QUANTITY REPLACE INDICATOR N47 OR N48
INDICATING SYSTEM NORMAL. (79-31-02).

Oil Quantity Indicating System Problems
Figure 102 (Sheet 2)

EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH OIL QUANTITY ú

 71-00-55
 INDICATORS  ú
 ú  C02  Page 107
 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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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 
ENGINES EIS SEC 3 ENGINES EIS SEC 1 DO-NOT-CLOSE TAGS: MAKE SURE THESE CIRCUIT BREAKERS ARE OPEN AND ATTACH 
PROBLEMS INDICATING SYSTEM OIL QUANTITY  OIL TANK IS SERVICED (AMM 12-13-11/301) ELECTRICAL POWER IS ON (AMM 24-22-00/201) MAKE SURE THE AIRPLANE IS IN THIS CONFIGURATION:

NO

1 DO THE SECONDARY ENGINE
AND HYDRAULICS DISPLAY BITE
TEST (AMM 31-42-00/501).

DOES THE DISPLAY PASS THE TEST?
YES YESNO

3 LOOK AT THE OIL QUANTITY
10 OPEN THE RIGHT FAN COWL 23 EXAMINE THE CIRCUIT FROM
DISPLAY. PANEL (AMM 71-11-02/201). THE OIL QUANTITY TRANSMITTER
DOES THE DISPLAY READ DISCONNECT THE ELECTRICAL PLUG TO SECONDARY ENGINE AND
94% - 100% FULL?AT THE OIL QUANTITY TRANSMIT-HYDRAULICS DISPLAY
TER (FIG. 101). (WDM 79-31-01).

YES
EXAMINE THE CAPACITANCE REPAIR THE PROBLEMS THAT FROM PIN 1 TO PIN 2 OF THEYOU FIND. TRANSMITTER WITH PIN 3GROUNDED.
IS CAPACITANCE 85.3 |0.5 pf?
NO
NO
5 DRAIN THE ENGINE OIL TANK 27 REPLACE THE OIL QUANTITY
(AMM 12-13-11/301) WHILE YOU TRANSMITTER, M213
LOOK AT THE OIL QUANTITY (AMM 79-31-01/401).
INDICATOR.

DOES THE INDICATOR POINTER DESCEND SMOOTHLY TO ZERO?
YES

7 REPLENISH THE OIL TANK (AMM 12-13-11/301). OIL QUAN-TITY INDICATING SYSTEM NORMAL.

BOEING 737-SL-31-032 ADVISES OF TWO SMITHS COMPONENT SERVICE BULLETINS TO CORRECT AN ENGINE OIL QUANTITY INPUT VALUE CAUSED BY DC VOLTAGE TO THE EIS INPUT.
Oil Quantity Indicating System Problems
Figure 102 (Sheet 3)

EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH SECONDARY ENGINE ú

 71-00-55
 AND HYDRAULICS DISPLAY  ú ú C02.1 Page 108 ú Jul 12/02
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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