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S APU door failed to open within 30 seconds of command.
S APU door was open then closed without command, while the APU was operating.
S ECU internal failure.
S No APU rotation -- During start, speed did not reach 5% within specified time
requirement (12 seconds for warm oil; 50 seconds for cold oil).
S No APU light-off -- Light-off was not detected within specified time requirement.
S Slow start -- Starting time period exceeded.
S No acceleration -- Acceleration during start was less than 0.05% per second for 15
seconds.
S Speed fallback -- The APU speed drops below 50% after starter cutout.
S Loss of DC power -- Battery power lost for more than 200 milliseconds.
S APU fire/emergency -- APU FIRE PUSH switch or one of the emergency shutdown
switches was selected.
S Loss of air inlet door position sensor signal -- Failure of air inlet door position sensor.
The ECU will shut down the APU (on ground) if any of the following faults occur:
S Overtemperature -- APU EGT exceeded schedule limits.
S Low oil pressure (LOP) -- Low oil pressure exists for 15 seconds with the APU
operating.
S Oil pressure switch failed -- Cannot detect a low oil pressure condition.
S High oil temperature -- Oil temperature exceeded 300_F with the APU operating.
S Reverse flow -- APU inlet temperature exceeded 350_F for 5 seconds with with the
APU operating and LCV open.
Vol. 1 04--40--7
AUXILIARY POWER UNIT
Control Sep 09/02
Flight Crew Operating Manual
CSP C--013--067
S Underspeed -- APU was operating and speed dropped below 80% for 5 seconds.
S Loss of EGT sensors -- Both EGT sensor channels failed.
S APU oil filter in an impending bypass condition.
D. System Circuit Breakers
SYSTEM SUB--SYSTEM CB NAME BUS BAR CB
PANEL
CB
LOCATION
NOTES
APU CONT
BATTERY
N7
Auxiliary
Control
APU ECU
PRIM
BUS 1
N11
Power Unit APU ECU SEC
APU BATT
A6
APU DOOR
ACT
DIRECT BUS 5
B1
Vol. 1 04--40--8
AUXILIARY POWER UNIT
Control Sep 09/02
Flight Crew Operating Manual
CSP C--013--067
THIS PAGE INTENTIONALLY LEFT BLANK
AURAL/VISUAL INDICATING AND Vol. 1 02--00--1
RECORDING
Table of Contents REV 3, May 03/05
Flight Crew Operating Manual
CSP C--013--067
CHAPTER 2 --- AURAL/VISUAL INDICATING AND RECORDING
Page
TABLE OF CONTENTS 02--00
Table of Contents 02--00--1
INTRODUCTION 02--10
Introduction 02--10--1
ENGINE INDICATING AND CREW ALERTING SYSTEM 02--20
Engine Indicating and Crew Alerting System 02--20--1
Display Reversion 02--20--6
Aural Warning 02--20--7
Master Warning / Master Caution Lights 02--20--9
Crew Alerting System Messages 02--20--9
Synoptic Pages 02--20--11
EICAS Warning Messages (Red) and Aurals 02--20--13
EICAS Caution Messages (Amber) 02--20--14
EICAS Advisory Messages (Green) 02--20--16
EICAS Status Messages (White) 02--20--17
Inhibits 02--20--18
Warning Inhibits 02--20--20
Caution Inhibits 02--20--21
Take-Off Configuration Warnings 02--20--21
Landing Configuration Warnings 02--20--25
Menu Page 02--20--26
System Circuit Breakers 02--20--28
RECORDING 02--30
Recording 02--30--1
System Circuit Breakers 02--30--4
MAINTENANCE DIAGNOSTIC SYSTEM 02--40
Maintenance Diagnostic System 02--40--1
Maintenance Main Menu Overview 02--40--3
Data Loader Unit 02--40--6
System Circuit Breakers 02--40--6
LIST OF ILLUSTRATIONS
INTRODUCTION
Figure 02--10--1 Aural/Visual Indicating and Recording Schematic 02--10--2
AURAL/VISUAL INDICATING AND Vol. 1 02--00--2
RECORDING
Table of Contents REV 3, May 03/05
Flight Crew Operating Manual
CSP C--013--067
ENGINE INDICATING AND CREW ALERTING SYSTEM
Figure 02--20--1 Engine Indicating and Crew Alerting System -- General 02--20--3
Figure 02--20--2 EICAS Control Panel 02--20--4
Figure 02--20--3 EICAS Miscomparison Indication 02--20--5
Figure 02--20--4 Display Reversion 02--20--6
Figure 02--20--5 Display Selector 02--20--6
Figure 02--20--6 DCU Controls and Indications 02--20--8
Figure 02--20--7 Master Warning / Master Caution Lights 02--20--9
Figure 02--20--8 EICAS Display Message Fields 02--20--12
Figure 02--20--9 Take--Off Configuration Advisory 02--20--22
Figure 02--20--10 Take--Off Configuration Warning 02--20--24
Figure 02--20--11 Menu Page 02--20--27
RECORDING
Figure 02--30--1 Recording 02--30--2
Figure 02--30--2 Recording -- EICAS Indications 02--30--3
MAINTENANCE DATA COMPUTER
Figure 02--40--1 Maintenance Data Computer -- Controls 02--40--2
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