71-00-42
 ALL  ú
 ú  C02  Page 117
 ú  Nov 15/97 

BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
FLAMEOUT WITH  PREREQUISITES 
ABNORMAL PARAMETERS  NONE 
AFTER RESTART 

ENGINE INLET FOR FOD AND THE EXHAUST ARE FOR METALPARTICLES.
IS FOD OR METAL PARTICLES FOUND?

NO
YES

3 EXAMINE THE MAGNETIC CHIP
32 REPLACE THE ENGINE
DETECTORS (AMM 79-00-00/601).(AMM 71-00-02/401).
ARE INDICATIONS OF INTER-NAL ENGINE/GEARBOX FAILURE FOUND?

NO
NO

5 LOOK TO SEE IF THE FUEL
PUMP IMPELLER TURNS
(AMM 71-00-59/101, FIG. 102).
DOES THE IMPELLER TURN?
YES
NO

9 EXAMINE THE AIRPLANE FUEL
FEED SYSTEM (AMM 28-22-00/
101).
IS THE OPERATION OK?

YES
YES
11 EXAMINE THE ENGINE FUEL CARTRIDGE (AMM 73-11-02/601).

 IS THERE ANY TRACE OF BRONZE IN THE FILTER?
NO
YES
13 EXAMINE THE AIRPLANE AND STRUT FOR FUEL SYSTEM LEAKS

(AMM 28-22-41/401).
 ARE LEAKS FOUND?
NO
(AMM 71-00-02/401) AS NECESSARY.
IF FOD IS FOUND, REFER TO BIRD STRIKE/FOD TROUBLE-SHOOTING (AMM 71-00-47/001).

SEE SHEET 2 (BLOCK 16)
Flameout with Abnormal Parameters After Restart
Figure 108 (Sheet 1)

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 71-00-42
 ALL  ú
 ú  C02  Page 118
 ú  Mar 15/98 

BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
FROM SHEET 1(BLOCK 13)

TUBING FOR DAMAGE
(AMM 71-00-58/101, FIG. 104). IS DAMAGE FOUND?
AS NECESSARY.

INCLUDING DRAIN HOLES FOR CDP TUBE AS NECESSARY.
LEAKS, DAMAGE, OR BLOCKAGE
(AMM 71-00-59/101, FIG. 104).

ARE LEAKS, DAMAGE, OR BLOCKAGE FOUND?

NO NO

17 DO THE CIT SENSOR OPERA-
53 REPLACE THE CIT SENSOR
TIONAL CHECK (AMM 73-21-02/(AMM 73-21-02/401).
601).

IS CIT SENSOR OPERATIONAL?

NO YES

18 BORESCOPE INSPECT THE
55 REPLACE THE ENGINE
BOOSTER, HPC 3RD-,5TH-, AND (AMM 71-00-02/401).
9TH-STAGE BLADES COMBUSTION CHAMBER, HPT BLADES AND 1ST-STAGE LPT BLADES (AMM 72-00-00/601).
IS DAMAGE BEYOND ACCEP-TABLE LIMITS FOUND?
NO
NO
YES 59 CONTINUE THE ENGINE IN SERVICE.

Flameout with Abnormal Parameters After Restart
Figure 108 (Sheet 2)

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 71-00-42
 ALL  ú ú C02 Page 119 ú Nov 15/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
FLAMEOUT WITH NORMAL OPERATION AFTER RESTART
PREREQUISITES 28V DC ELECTRICAL POWER

YES
EXAMINE THE AIRPLANE FUEL SYSTEM FOR WATER (AMM 12-11-00/301).
IS AN UNUSUAL AMOUNT OF WATER FOUND?
NO
YES
2 DO THIS PROCEDURE: FUEL
FILTER CHECK (AMM 71-00-59/
101, FIG. 103).
IS CONTAMINATION OR BLOCKAGE FOUND?

NO

3 WITH THE ENGINE STATIC,
NO
POSITION APPROPRIATE START LEVER TO THE IDLE POSITION.
DOES THE FUEL VALVE CLOSED LIGHT ON PILOTS' OVERHEAD PANEL P5 COME ON FROM DIM TO BRIGHT THEN EXTINGUISH?

YES
NO

5 LOOK TO SEE IF THE FUEL
PUMP IMPELLER TURNS
(AMM 71-00-59/101, FIG. 102).
DOES THE IMPELLER TURN?

YES
NO

9 EXAMINE THE AIRPLANE FUEL
FEED SYSTEM (AMM 28-22-00/
101).
IS THE OPERATION OK?

YES
YES
13 EXAMINE THE AIRPLANE AND
STRUT FOR FUEL SYSTEM LEAKS
(AMM 28-22-41/401).

 ARE LEAKS FOUND?

NO
SEE SHEET 2 (BLOCK 17) 1
Flameout with Normal Operation After Restart
Figure 109 (Sheet 1)

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