B737 FQIS System Guide

dha_rhn · 发表于 2014-6-4 01:13:59

B737 FQIS System Guide
SMITHS AEROSPACE CUSTOMER
SERVICES
SYSTEM GUIDE
FOR
Boeing 737-100/200/300/400/500
FUEL QUANTITY INDICATING SYSTEM
Post STC
SA3498NM (FQIS) & ST00847SE (TSU)

REVISION HISTORY

Revision	Date	List of Effected Pages	Changed By

Initial Issue	11/05/2006	All	RCM
A	29/06/2006	1. Page 4: Update TOC 2. Page 27: Additional information added to note 3. Pages 35 and 48: Corrected spelling errors 4. Page 60: Added full details of SB numbers and SB STC3498NM-28-1 5. Page 66: Inserted Annex F – Typical B737 Calibration Work Record Sheet.	RCM
B	15/09/06	1. Page 35: Revised text. 2. Page 52: Further troubleshooting. 3. Page 60: Correct text errors. 4. Page 65: Correct conversions. 5. Page 66: Table and text updated.	RCM

CONTENTS

REVISION HISTORY.......................................................................................................................... 2
CONTENTS ........................................................................................................................................ 3
ABBREVIATIONS ............................................................................................................................... 5
1.0 - INTRODUCTION  ............................................................................................................................ 6
Fuel Mass Versus Weight Theory Revisited....................................................................................... 7
Probe Arrays ....................................................................................................................................... 9
Bussing Plug ..................................................................................................................................... 10
2.0 – SYSTEM OPERATION ................................................................................................................ 11
Overview ........................................................................................................................................... 12
System Block Diagram ..................................................................................................................... 13
3.0 - FUEL QUANTITY INDICATION SYSTEM COMPONENTS ........................................................ 14
Smiths LRU’s for the B737 ............................................................................................................... 15
4.0 DESCRIPTION  / OPERATION OF INDIVIDUAL LRU’S ............................................................... 16
Master Fuel Quantity Indicators (MFQI) ........................................................................................... 17
Master Fuel Quantity Indicator Theory of Operation ........................................................................ 18
Master Indicator Self-Test Procedure ............................................................................................... 19
Master Indicator Error Codes And Bite Description .......................................................................... 20
Notes on BITE Codes ....................................................................................................................... 22
Clearing Stored Error Codes from Memory ...................................................................................... 23
MFQI Replacement........................................................................................................................... 24
Substitution of Suspected MFQI................................................................................................... 24
Digital Calibration Trim Unit (DCTU)................................................................................................. 25
Digital Calibration Trim Unit (DCTU) Operation................................................................................ 26
DCTU Replacement.......................................................................................................................... 27
Programming DCTU Parameters...................................................................................................... 28
Fuel Quantity Repeater Indicator...................................................................................................... 29
Repeater Indicator ............................................................................................................................ 30
Repeater Self Test Procedure .......................................................................................................... 31
Error Codes and BITE .................................................................................................................. 31
Repeater indicator Replacement .................................................................................................. 31
Transient Suppression Unit .............................................................................................................. 32
Fuel Summation Unit ........................................................................................................................ 33
5.0 FIVE SYSTEM CALIBRATION  ...................................................................................................... 34
System Calibration ............................................................................................................................ 35
Precalibration Procedure .............................................................................................................. 35
Parameter Description ...................................................................................................................... 36
Dry Calibration .................................................................................................................................. 37
Wet Calibration ................................................................................................................................. 41
Notes on Recalibration ................................................................................................................. 43
6.0 – SYSTEM BITE ............................................................................................................................. 44
MFQI Bite System Operation ............................................................................................................ 45
Soft Error “ERR” ........................................................................................................................... 45
Hard Error “ERR O” ...................................................................................................................... 45
BITE “ERR” Code Location Guide .................................................................................................... 46
Bite “Error” Codes ............................................................................................................................. 47
Error Code Explanations................................................................................................................... 47
ERR 1, Compensator Lo-Z Short/Open ....................................................................................... 47
ERR 2, Compensator Lo-z Short/Open ........................................................................................ 48
ERR 3, Excessive Compensator Leakage ................................................................................... 48
ERR 4, Tank Lo-z Open/Short ..................................................................................................... 48
ERR 5, Tank Probe Shorted......................................................................................................... 49
ERR 6, Excessive Tank Leakage ................................................................................................. 49
ERR 7, DCTU Failure ................................................................................................................... 49
ERR 8, DCTU Data Out of Range ................................................................................................ 50
ERR 9, Indicator NOVRAM Failure .............................................................................................. 50
ERR 10, Hi-z Signal Failure ......................................................................................................... 50
7.0 – SYSTEM TROUBLESHOOTING................................................................................................. 51
Introduction ....................................................................................................................................... 52
General ............................................................................................................................................. 52
Test Equipment ................................................................................................................................. 53
Master Fuel Quantity Indicator - MFQI ............................................................................................. 53
Digital Calibration Trim Unit - DCTU (Possibly Codes 7, 8 & 9) ....................................................... 54
Hi - Z (Plug Connection to the DCTU) .............................................................................................. 54
Transient Suppression Unit – TSU ................................................................................................... 55
Bonding ............................................................................................................................................. 55
Water (Initially 3 leading to 4, 5 & 6) ................................................................................................. 55
Bussing Plug ..................................................................................................................................... 55
Repeater Indicators........................................................................................................................... 56
Probes & In-Tank wiring ................................................................................................................... 56
Fuel Summation Unit - FSU .............................................................................................................. 56
Drip Sticks ......................................................................................................................................... 57
8.0 - ANNEX ......................................................................................................................................... 58
ANNEX A – CUSTOMER SUPPORT CONTACTS.............................................................................. 59
ANNEX B – REFERENCE DOCUMENTS ........................................................................................... 60
ANNEX C.1 – QUICK REFERENCE GUIDES ..................................................................................... 61
Annex C.1 MFQI Stored Parameters................................................................................................ 61
Annex C.2 BITE – System “ERR” Codes. ........................................................................................ 62
ANNEX D – MAINTENANCE  TIPS – SUMMARY................................................................................ 63
Bussing Plug................................................................................................................................. 63
Master Fuel Quantity Indicator. .................................................................................................... 63
Clearing Stored Error codes from Memory. ................................................................................. 63
Substitution of Suspected MFQI................................................................................................... 63
Digital Calibration Trim Unit.......................................................................................................... 63
Repeater Indicator. ....................................................................................................................... 64
Transient Suppression Unit. ......................................................................................................... 64
Fuel Summation Unit .................................................................................................................... 64
System Operation. ........................................................................................................................ 64
Calibration. ................................................................................................................................... 64
Built In Test Equipment ................................................................................................................ 64
ANNEX E – B737 LB/KG CONVERSION ............................................................................................ 65
ANNEX F - TYPICAL B737 CALIBRATION  WORK RECORD SHEET .............................................. 66

ABBREVIATIONS

Throughout this document the following abbreviations may be used:

Term	Description
BIT	Built-In Test
BITE	Built-In Test Equipment
ºC	Degrees Celsius
CAL	Calibrate/Calibration
C/B	Circuit Breaker
CS	Customer Services
CSC	Customer Services Cheltenham
CSD	Customer Services Division
DCTU	Digital Calibration Trim Unit
FMCS	Flight Management Computer System
FSU	Fuel Summation unit
FQI	Fuel Quantity Indicator
FQIS	Fuel Quantity Indicating System
GAL	Gallon
hrs	Hours
Hz	Hertz
KHz	kilo-hertz
Kg	Kilogram
Kgs	Kilograms
Lb	Pound
Lbs	Pounds
LCD	Liquid Crystal Display
mA	milliamperes
MFQI	Master Fuel Quantity Indicator
MEL	Minimum Equipment List
pF	Pico Farads
TSU	Transient Suppression Unit
µJ	micro Joule
VSO	Volumetric Shut Off

aureate · 发表于 2014-6-4 10:11:57

有没有详细的内容介绍

拖地板老师傅 · 发表于 2014-6-4 12:10:55

system guide怎么个意思？系统指引？

caodan588 · 发表于 2014-6-7 10:27:14

非常感谢楼主的分享

[s:595] [s:595] [s:595]

levin · 发表于 2014-6-9 21:53:15

燃油系统的指示系统，可以下载学习下。

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[B737] B737 FQIS System Guide

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