71-00-42
ALL ú ú C02 Page 101 ú Jul 12/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
Trouble Symptom_______________ Begin Trouble Shooting______________________
Flameout With No Restart
Attempt for Non-Engine
Related Reasons Fig. 112 Block 1
N1 and N2 RPM
Not Stable Fig. 113 Block 1
Fig. 114 NOT USED
PMC INOP Light On Fig. 115 Block 1
Throttle Stagger or N1 Is Not At Target
For Throttle Hold During Takeoff Fig. 116 Block 1
Throttle Stagger or N1 Is Not At Target
in All Phases of Flight Not Known Fig. 117A Block 1
Throttle Stagger or N1 Is Not At Target
at Climb or Cruise Fig. 117B Block 1
Throttle Stagger or N1 Is Not At Target
in Approach Fig. 117C Block 1
N1 RPM Out of Limits During MEC
Part Power Trim Test Fig. 118 Block 1
Differential Engine Acceleration
From Low Idle Fig. 119 Block 1
Slow/Hung Deceleration Fig. 120 Block 1
Engine Speeds High During High
Altitude Descent Fig. 121 Block 1
Reverse %N1 Lower Or Higher Than
Expected Fig. 122 Block 1
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71-00-42
ALL ú ú C03 Page 102 ú Jul 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
PREREQUISITES ENGINE OPERATION CAN BE NECESSARY
SLOW/HUNG ACCELERATION
LIMITS FOUND?
NO NO
4 DO THE SPECIFIC GRAVITY
SETTING CHECK (AMM 71-00-58/
101, FIG. 103).
IS THE SETTING WITHIN THE PERMITTED RANGE OF THE FUEL?
YES YES
5 DO A CHECK OF THE CDP TUBE
INCLUDING TUBE DRAIN HOLES FOR
LEAKS, DAMAGE, AND BLOCKAGE.
CHECK INLET TO THE CDP/CBP
SENSOR FOR BLOCKAGE
(AMM 71-00-59, FIG. 104).
ARE LEAKS, DAMAGE OR BLOCKAGE FOUND?
NOYES
6 VISUALLY EXAMINE THE VSV
36 REPAIR/REPLACE THE VSV
ACTUATOR SYSTEM (AMM 72-35-00/ ACTUATION SYSTEM COMPONENTS.
601) FOR DAMAGE.
IS DAMAGE MORE THAN THE LIMITS FOUND?
NO
YES
NO SEE SHEET 2
(BLOCK 8)
Slow/Hung Acceleration
Figure 101 (Sheet 1)
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71-00-42
ALL ú
ú C01 Page 103
ú Mar 15/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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 7)
NO
YES
8 VISUALLY EXAMINE THE 5TH-
38 REPAIR/REPLACE THE
AND 9TH-STAGE PNEUMATIC COMPONENTS.
DUCTING/VALVES FOR SIGNS OF
LEAKS (AMM 71-00-58/101,
FIG. 107).
ARE LEAKS FOUND?
NO NO
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