PULL THE BIT SWITCH TO THE
"INDICATE" POSITION.

IS THE "VSCF FAULT DETECTED" LIGHT ON?

NO
SEE SHEET 2 (BLOCK 4)

The HIGH OIL TEMP Light Comes On
Figure 102 (Sheet 1)

EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. VARIABLE SPEED CONSTANT FREQUENCY ú

 24-11-00
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A 737-300/400/500MAINTENANCE MANUAL
FROM SHEET 1
(BLOCK 3)
NO

YES YES
4 DISCONNECT CONNECTOR D2510
21 DISCONNECT CONNECTOR D1086

44 FOR ENGINE 1 (ENGINE 2),
EXAMINE THE CIRCUIT FROM CON-NECTOR D2510, PIN A, TO THE
VSCF OIL OVERHEAT SENSOR,
S754, AND CONNECTOR D1086,
PIN 40 (CONNECTOR D636,
PIN 50)(WDM 24-11-11,-12).

REPAIR THE PROBLEMS THAT YOU FIND.
FROM THE VSCF OIL OVERHEAT FROM THE P5-5 MODULE. DO A SENSOR, S754. CONTINUITY CHECK BETWEEN D1086 IS THE HIGH OIL TEMP LIGHT PIN 40 AND STRUCTURE GROUND. ON? IS THERE CONTINUITY?

NO  
NO

45 REPLACE THE P5-5 MODULE (WDM 24-11-11). RECONNECT D2510 AND D1086.

5 CONNECT PINS A AND C OF D2510 WITH A JUMPER.
IS THE HIGH OIL TEMP LIGHT ON?

YES

NO
The HIGH OIL TEMP Light Comes On
Figure 102 (Sheet 2)

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A 737-300/400/500MAINTENANCE MANUAL
PREREQUISITE ENGINES SHUT DOWN
THE GEN DRIVE OIL TEMP GAGE SHOWS A RISE TEMPERATURE OF 0`C OR MORE THAN 20`C

YES
1
MAKE SURE THAT THE ENGINES
ARE SHUT DOWN FOR 5 MINUTES
MINIMUM. REMOVE THE VENT PLUG
AND EXAMINE THE OIL LEVEL IN
THE SIGHT GLASS OF THE VSCF.

IS THE OIL LEVEL BELOW THE "ADD" LINE?

NO
YES
2 INSTALL THE VENT PLUG. REMOVE THE FILTER ELEMENT FROM
THE FILTER IN THE GENERATOR
DRIVE OIL LINE (AMM 24-11-31/
201). EXAMINE THE FILTER FOR
LARGE METAL PARTICLES.
 DOES THE FILTER ELEMENT CONTAIN LARGE METAL PARTICLES?

NO
NO

3 INSTALL THE FILTER ELE-MENT. DISCONNECT CONNECTOR D6
AT THE VSCF. MEASURE THE
RESISTANCE BETWEEN PINS 3 AND
4 OF THE J6 RECEPTACLE ON THE
VSCF.
 IS THE RESISTANCE INSIDE THE LIMITS GIVEN IN FIG. 105?
YES NO
4 MEASURE THE RESISTANCE BETWEEN PINS 5 AND 6 OF THE J6
RECEPTACLE.
 IS THE RESISTANCE INSIDE THE LIMITS GIVEN IN FIG. 106?

P5-5 MODULE (WDM 24-11-11).
IF THE PROBLEM CONTINUES, THEN FOR ENGINE 1 (ENGINE 2),EXAMINE THE CIRCUIT FROM CON-NECTOR D6, PINS 3,4,5, AND 6, TO THE VSCF, AND CONNECTOR D1086, PINS 32,39,38, AND 39 (CONNECTOR D636, PINS 18,17, 39 AND 17), TO THE P5-5 MODULE (WDM 24-11-11,-12).
REPAIR THE PROBLEMS THAT YOU FIND.
The GEN DRIVE OIL TEMP Gage Shows a Rise Temperature of 0`C or More Than 20`C Figure 103
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. VARIABLE SPEED CONSTANT FREQUENCY ú

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A 737-300/400/500MAINTENANCE MANUAL 
PREREQUISITE 
IN TEMPERATURE OF TEMP GAGE SHOWS AN THE GEN DRIVE OIL MORE THAN 120`C  C467 CSD CONT-2 C466 CSD CONT-1CBs: ENGINES SHUT DOWN ELECTRICAL POWER (24-22-00/201) 

OF THE VSCF EXTERNAL OILCOOLER.
ARE THE PASSAGES CLEAR?
MATERIAL FROM THE AIR PASSAGES ON THE OIL COOLER.
YES
NO

2 MAKE SURE THAT THE ENGINES

ARE SHUT DOWN FOR 5 MINUTES
MINIMUM. REMOVE THE VENT PLUG
AND EXAMINE THE OIL LEVEL IN
THE SIGHT GLASS OF THE VSCF.
IS THE OIL LEVEL BETWEEN THE "FULL" LINE AND THE "ADD"LINE?
YES
　
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