EGT Is Too High or Out of Control during the Application of the Bleed Load
Figure 122 (Sheet 2)
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A53639
EGT IS TOO HIGH OR PREREQUISITES OUT OF CONTROL DUR-
NONE ING THE APPLICATION
OF THE BLEED LOAD
POSSIBLE CAUSES:
1.
REGULATOR FOR THE DIFFERENTIAL AIR PRESSURE PROBLEM (AMM 49-52-21/401)
2.
PROPORTIONAL CONTROL VALVE PROBLEM (AMM 49-52-31/401)
3.
ELECTRONIC TEMPERATURE CONTROL, M1459, PROBLEM (AMM 49-61-71/401)
4.
TEMPERATURE SENSOR, T2, FOR THE COMPRESSOR INLET PROBLEM (AMM 49-61-32/401)
5.
ETC THERMOCOUPLE PROBE PROBLEM (AMM 49-71-31/401)
6.
CLOGGED TEE FITTING FOR THE CONTROL AIR LINE
7.
3-WAY SOLENOID VALVE PROBLEM (AMM 49-52-61/401)
8.
BLEED AIR VALVE, V56, PROBLEM (AMM 49-52-11/401).
FAULT ISOLATION:
SEE SHEET 2 (BLOCK 2)
EGT Is Too High or Out of Control during the Application of the Bleed Load
Figure 122A (Sheet 1)
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E05975
////////////////////////A / GTCP85-129 SERIES /737-300/400/500/ ENGINES /MAINTENANCE MANUAL ////////////////////////
FROM SHEET 1
(BLOCK 1)
YES
YES
2
MAKE SURE THE TEE FITTING
52 CLEAN THE TEE FITTING FOR FOR THE CONTROL AIR LINE IS THE CONTROL AIR LINE NOT CLOGGED. (AMM 49-52-91/701) OR REPLACE THE TEE FITTING.
NOTE:THE ORIFICE OF THE TEE
FITTING MUST BE 0.080
TO 0.084 INCH
(2.03 TO 2.13 mm).
IS THE TEE FITTING
CLOGGED?
NONO
3 DO A CHECK OF THE INSTAL-53 REMOVE AND INSTALL THE
LATION OF THE 3-WAY SOLENOID 3-WAY SOLENOID VALVE OR
VALVE.REPLACE THE VALVE
IS THE 3-WAY SOLENOID (AMM 49-52-61/401).
VALVE INSTALLED CORRECTLY?
YES NO
4 REPLACE THE PROPORTIONAL 54 THE SYSTEM IS OK.
CONTROL VALVE (AMM 49-52-31/
401).
DOES THE PROBLEM CONTINUE?
YES YES
5 DO THE ADJUSTMENT OF THE
ELECTRONIC TEMPERATURE CONTROL
(AMM 49-61-71/501).
DOES THE EGT ADJUST TO THE RECOMMENDED TEMPERATURE RANGE?
NO SEE SHEET 3
(BLOCK 21)
EGT Is Too High or Out of Control during the Application of the Bleed Load
Figure 122A (Sheet 2)
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E05983
FROM SHEET 2 (BLOCK 5)
NO
NO
21 REPLACE THE ELECTRONICTEMPERATURE CONTROL, M1459 (AMM 49-61-71/401).
DOES THE PROBLEM CONTINUE?YES
NO
22 REPLACE THE TEMPERATURE SENSOR, T2, FOR THE COMPRESSOR INLET (AMM 49-61-32/401).
DOES THE PROBLEM CONTINUE? YES
NO
23 REPLACE THE ETC THERMO-COUPLE PROBES (AMM 49-71-31/ 401).
DOES THE PROBLEM CONTINUE?
EGT Is Too High or Out of Control during the Application of the Bleed Load
Figure 122A (Sheet 3)
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E05990
////////////////////////A / GTCP85-129 SERIES /737-300/400/500/ ENGINES /MAINTENANCE MANUAL ////////////////////////
BLEED AIR FOR MAIN ENGINE START IS NOT SUFFICIENT PREREQUISITES
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