(CONTINUED)
* FAULT YY DESIGNATES THE FAULT NUMBERS. ** ZZ IS THE SPECIFIC 2 DIGIT FAULT CODE.
02, 03, 04, 06, 07, 08, 09, 10, 11, 12, 13, 26
AVM Indication Problem
Figure 104 (Sheet 13)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. úAIRPLANES WITH S360N021-113 AVM SIGNAL ú
71-00-54
úCONDITIONERS ú
ú C01.1 ú BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details. Page 123Jul 12/00
H54936
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
55 (CONTINUED)
(FRONT PANEL) MAINTENANCE MESSAGE CODE FAULT DESCRIPTION ACTION
FAULT ZZ** FAULT YY* (CONTINUED) AVM SYST 19, 20, 32, 33 TEST FAILURE VIBRATION CHAIN ACCELEROMETER WIRING FOR INSULATION RESISTANCE AND CAN BE CAUSED BY SHORT BETWEEN THE ACCELEROMETER LINES OR HIGH NOISE ON ACCELEROMETER INPUTS. EXAMINE THE THE AVM SIGNAL CONDITIONER, M1240 (AMM 77-31-03/401) CONTINUITY. IF THE WIRING PROBLEMS ARE NOT FOUND, REPLACE
21, 34 ADC FAILURE (AMM 77-31-03/401) REPLACE THE AVM SIGNAL CONDITIONER, M1240
22, 23, 35, 36 FAILURE TACHOMETER CHAIN (AMM 77-31-03/401) REPLACE THE AVM SIGNAL CONDITIONER, M1240
24, 37 CORRECTION FACTORS VIBRATION CORRUPTED (AMM 77-31-03/401) REPLACE THE AVM SIGNAL CONDITIONER, M1240
25 MISSING PULSE E1 THE AVM SIGNAL CONDITIONER, M1240 (AMM 77-31-03/401) TACHOMETER SIGNAL. IF THE PULSE IS ACCEPTABLE, REPLACE IF THE INDEX PULSE IS NOT ACCEPTABLE, TROUBLESHOOT N1 VERIFY THE N1 TACHOMETER OUPUT FOR INDEX (1/REV) PULSE.
38 MISSING PULSE E2 THE AVM SIGNAL CONDITIONER, M1240 (AMM 77-31-03/401) TACHOMETER SIGNAL. IF THE PULSE IS ACCEPTABLE, REPLACE IF THE INDEX PULSE IS NOT ACCEPTABLE, TROUBLESHOOT N1 VERIFY THE N1 TACHOMETER OUPUT FOR INDEX (1/REV) PULSE.
* FAULT YY DESIGNATES THE FAULT NUMBERS. ** ZZ IS THE SPECIFIC 2 DIGIT FAULT CODE.
AVM Indication Problem
Figure 104 (Sheet 14)
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71-00-54
úCONDITIONERS ú
ú C01.1 ú BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details. Page 124Jul 12/00
L05759
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
POWER PLANT - TROUBLE SHOOTING (OIL INDICATING)
_______________________________________________
1. General
_______
A. Trouble shooting charts are provided for isolating and correcting problems with oil indicating systems.
B. Use this procedure only if the problem is known to exist in the oil indicating system. If the source of the problem has not been determined, refer to oil system trouble shooting (Ref 71-00-44).
2. AIRPLANES WITH OIL SYSTEM INDICATORS; Trouble Symptoms Listing
________________________ Trouble Symptom_______________ Begin Trouble Shooting
Oil Quantity Indicator Inoperative Fig. 102 Block 1 Reads Below Zero Fig. 102 Block 1 Reads Off Scale High Fig. 102 Block 1 Reading Does Not Change Fig. 102 Block 1 Oil Quantity Indicator Reads Improperly Fig. 102 Block 3 Fluctuates Fig. 102 Block 5 High or Low Fig. 102 Block 3
NOTE: Engine oil level fluctuations of less than +/- 1 quart
____ (1 liter) are in the permitted limits for normal engine operation.
Oil Pressure Indicator Inoperative Fig. 103 Block 1 Reads Below Zero Fig. 103 Block 1 Reads Off Scale High Fig. 103 Block 12 Oil Pressure Indicator Reads Improperly Fig. 103 Block 1 Fluctuates Fig. 103 Block 3 Low or High Fig. 103 Block 1 Oil Temperature Indicator Inoperative Fig. 104 Block 3 Reads Off Scale Low Fig. 104 Block 10 Reads Off Scale High Fig. 104 Block 11 Oil Temperature Indicator Reads Improperly Fig. 104 Block 3 Fluctuates Fig. 104 Block 3 High or Low Fig. 104 Block 3 Low Oil Pressure Warning Light Problems Fig. 105 Block 1 Illuminated, Oil Pressure Normal Fig. 105 Block 3 Always Illuminated Fig. 105 Block 5 Extinuished After Engine Shutdown Fig. 105 Block 10 Oil Filter Bypass Warning Light Problems Fig. 106 Block 1 Illuminated During Engine Operation Fig. 106 Block 3 Always Illuminated Fig. 106 Block 10
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