8. On the glareshield panel 130VU or 131VU:
-push the MASTER CAUT pushbutton switch.
9. On the ECAM control panel:
-push the CLR pushbutton switch.
APU EMER SHUT DOWN
MASTER SW .... OFF
comes on.
On the glareshield panels 130VU and 131VU:
-the MASTER CAUT lights come on,
-a single chime is heard.
On the overhead panel 25VU:
-
the FAULT legend in the pushbutton APU MASTER SW comes on.
On the overhead panel 25VU:
-
the FAULT legend in the APU MASTER SWpushbutton switch goes off,
-
the ON legend in the APU MASTER SW pushbutton switch goes off.
On the ECAM upper display unit:
-
the warning, MASTER SW .... OFF goes off.
On the FUEL page of the ECAM lowerdisplay unit:
-
the APU LP fuel-valve symbol is shown in the closed position.
On the glareshield panels 130VU and131VU:
-
the MASTER CAUT lights go off.
On the ECAM upper display unit:
-
the warning, APU EMER SHUT DOWN goes off.
5. Close-up
________ Subtask 49-62-00-860-053
A. Put the aircraft back to its initial configuration.
(1)
Do the EIS stop procedure
(Ref. TASK 31-60-00-860-002).
(2)
De-energize the aircraft electrical circuits (Ref. TASK 24-41-00-862-002).
INDICATING - DESCRIPTION AND OPERATION
______________________________________
R **ON A/C 001-003, 051-099, 401-499,
1. General
_______
(Ref. Fig. 001)
The indicating system monitors the APU speed and the Exhaust Gas Temperature
(EGT).
You can also see on the Multipurpose Control & Display Unit (MCDU) the
unservicable LRUs and test results for the APU system.
2. System Description
__________________
(Ref. Fig. 001)
A. Power Indicating The power indicating system monitors the APU speed in revolutions per minute (rpm). Two speed sensors transmit a signal to the ECB 59KD. The ECB 59KD gives a speed signal to the Electronic Instrument System (EIS). The EIS shows the APU speed in percent on the APU system page at the ECAM lower display unit.
B. Temperature Indicating The temperature indicating system monitors the APU Exhaust Gas Temperature (EGT). Two rakes, each with two thermocouples, transmit a signal to the ECB 59KD. The ECB 59KD gives a EGT signal to the Electronic Instrument System (EIS). The EIS shows on the APU page at the lower ECAM display unit the APU EGT in DEG. C.
C. Built-In Test Equipment (BITE) The Electronic Control Box (ECB) 59KD has a Built-In Test Equipment (BITE) task. This is a function which provides fault detection, component protection, fault information and repair verification for the APU and the ECB itself. The ECB performs th BITE task in three routines:
-
the Power Up Test (PUT),
-
the In Operation Test (IOT),
-
the Self Test (SET).
The ECB transmits the data to the Centralized Fault Display-System (CFDS) (Ref. 31-30-00), if selected on the Multipurpose Control and Display Units (MCDUs) which are the interface for selection and indication of the data.
ECAM Display Units Figure 001
R EFF : 001-003, 051-099, 401-499, Page 249-70-00 Config-1 Aug 01/05
CES
D. APU Life Data You can also select the APU life data on the MCDUs for indication. The APU life data are:
-
the APU Serial Number,
-
the APU Operating Hours,
-
the APU Cycles.
The APU life data are stored in the ECB and the DMU (Ref. 31-00-00). The APU serial number is hardwired in the encoder, which is installed on the APU.
E. System Display During usual operation, the APU system page is shown (on the lower display unit of the ECAM) in one of these modes:
-
the manual mode,
-
the flight phase related mode,
-
the advisory automatic mode,
-
the failure related automatic mode.
(1)
Manual Mode In the manual mode, operation of the APU button (on the ECAM control panel 11VU on the pedestal) shows the APU system page (on the lower display unit) on the ECAM.
