ATA 49 L1_28p_17bw_11col
Short Description
A320 AUSTRIAN TTM...
Description
A318/A319/A320/A321 CFM 56 / Level 1
Austrian Technical Training School Notes - For Training Purposes Only
49 APU
TDTI / BUC / ATA 49
Issue: 01/01
Revision: 31.01.2009
Page 1
A318/A319/A320/A321 CFM 56 / Level 1
TDTI / BUC / ATA 49
Austrian Technical Training School Notes - For Training Purposes Only
Issue: 01/01
Revision: 31.01.2009
Page 2
A318/A319/A320/A321 CFM 56 / Level 1
Austrian Technical Training School Notes - For Training Purposes Only
This document must be used for training purpose only. Under no circumstances should this document be used as a reference. It will not be updated. All rights reserved. No part of this manual may be reproduced in any form, by photostat, microfilm, retrieval system, or any other means, without the prior written permission of AUSTRIAN AIRLINES.
TDTI / BUC / ATA 49
Issue: 01/01
Revision: 31.01.2009
Page 3
A318/A319/A320/A321 CFM 56 / Level 1
Austrian Technical Training School Notes - For Training Purposes Only
49 APU...............................................................................1 GENERAL ...........................................................................6 ENGINE DESCRIPTION..................................................................10
CONTROL AND INDICATING...........................................12 CONTROL PANELS ........................................................................12 EXTERNAL CONTROLS ..................................................................14 ECAM APU PAGE...........................................................................16
COMPONENT LOCATION .................................................18 ENGINE VIEW ..............................................................................18 ELECTRONIC CONTROL BOX (ECB) ................................................20 AIR INTAKE FLAP .........................................................................22
MAINTENANCE/TEST FACILITIES ..................................24 SAFETY PRECAUTIONS ...................................................26
TDTI / BUC / ATA 49
Issue: 01/01
Revision: 31.01.2009
Page 4
A318/A319/A320/A321 CFM 56 / Level 1
TDTI / BUC / ATA 49
Austrian Technical Training School Notes - For Training Purposes Only
Issue: 01/01
Revision: 31.01.2009
Page 5
A318/A319/A320/A321 CFM 56 / Level 1
Austrian Technical Training School Notes - For Training Purposes Only
GENERAL The Auxiliary Power Unit (APU) is a constant-speed gas turbine engine installed in the unpressurized tail cone. The APU is a self contained unit which enables the A/C to be independent of external pneumatic and electrical power sources. The APU is designed to operate throughout the entire flight envelope. Electrical power is available whenever the APU operates, but bleed air is shut off above FL250. The APU is able to supply: electrical power for the A/C systems bleed air for engine starting and air conditioning on the ground bleed air for air conditioning/pressurization and wing anti-ice in Flight
TDTI / BUC / ATA 49
Issue: 01/01
Revision: 31.01.2009
Page 6
A318/A319/A320/A321 CFM 56 / Level 1
Austrian Technical Training School Notes - For Training Purposes Only
GENERAL
TDTI / BUC / ATA 49
Issue: 01/01
Revision: 31.01.2009
Page 7
A318/A319/A320/A321 CFM 56 / Level 1
Austrian Technical Training School Notes - For Training Purposes Only
GENERAL
TDTI / BUC / ATA 49
Issue: 01/01
Revision: 31.01.2009
Page 8
A318/A319/A320/A321 CFM 56 / Level 1
Austrian Technical Training School Notes - For Training Purposes Only
This Page Intentionally Left Blank
TDTI / BUC / ATA 49
Issue: 01/01
Revision: 31.01.2009
Page 9
A318/A319/A320/A321 CFM 56 / Level 1
Austrian Technical Training School Notes - For Training Purposes Only
ENGINE DESCRIPTION The APU is a constant speed, single-shaft gas turbine engine that delivers mechanical shaft power to drive an accessory gearbox and a load compressor. The APU generator is driven by the gearbox and the load compressor supplies pneumatic power for starting, air conditioning, etc. The APU operation is controlled and monitored by the Electronic Control Box (ECB). The ECB has full authority over the following APU functions: starting, acceleration, speed governing, indication, fault monitoring, interface with A/C systems. The APU is capable of unattended operation; therefore, the ECB automatically shuts down the APU in case of a FAULT to protect the APU. Based on regulations, in-flight protective shutdowns may be inhibited, except for critical FAULTs.
TDTI / BUC / ATA 49
Issue: 01/01
Revision: 31.01.2009
Page 10
A318/A319/A320/A321 CFM 56 / Level 1
Austrian Technical Training School Notes - For Training Purposes Only
GENERAL - ENGINE DESCRIPTION
TDTI / BUC / ATA 49
Issue: 01/01
Revision: 31.01.2009
Page 11
A318/A319/A320/A321 CFM 56 / Level 1
Austrian Technical Training School Notes - For Training Purposes Only
CONTROL AND INDICATING This section will highlight the control panels and indications for the APU.
CONTROL PANELS The controls used to operate the APU are: the APU MASTER SWitch and START P/BSW, on the APU control panel the APU fire controls, on the FIRE panel.
TDTI / BUC / ATA 49
Issue: 01/01
Revision: 31.01.2009
Page 12
A318/A319/A320/A321 CFM 56 / Level 1
Austrian Technical Training School Notes - For Training Purposes Only
CONTROL AND INDICATING - CONTROL PANELS
TDTI / BUC / ATA 49
Issue: 01/01
Revision: 31.01.2009
Page 13
A318/A319/A320/A321 CFM 56 / Level 1
Austrian Technical Training School Notes - For Training Purposes Only
EXTERNAL CONTROLS In case of an APU FIRE warning on the ground, a loud horn will sound in the nose wheel well to tell ground personnel. Associated with the horn, a red APU FIRE light will come on, on the external power control panel on the lower fuselage. It is possible to do an EMERGENCY shut down of the APU from this panel by lifting the guard and pushing the APU SHUT OFF P/BSW.
TDTI / BUC / ATA 49
Issue: 01/01
Revision: 31.01.2009
Page 14
A318/A319/A320/A321 CFM 56 / Level 1
Austrian Technical Training School Notes - For Training Purposes Only
CONTROL AND INDICATING - EXTERNAL CONTROLS
TDTI / BUC / ATA 49
Issue: 01/01
Revision: 31.01.2009
Page 15
A318/A319/A320/A321 CFM 56 / Level 1
Austrian Technical Training School Notes - For Training Purposes Only
ECAM APU PAGE APU parameters are displayed on the ECAM APU page. The APU generator parameters are duplicated on the ECAM ELEC page and the APU pneumatic parameters are duplicated on the ECAM BLEED page.
TDTI / BUC / ATA 49
Issue: 01/01
Revision: 31.01.2009
Page 16
A318/A319/A320/A321 CFM 56 / Level 1
Austrian Technical Training School Notes - For Training Purposes Only
CONTROL AND INDICATING - ECAM APU PAGE
TDTI / BUC / ATA 49
Issue: 01/01
Revision: 31.01.2009
Page 17
A318/A319/A320/A321 CFM 56 / Level 1
Austrian Technical Training School Notes - For Training Purposes Only
COMPONENT LOCATION The APU is installed in the tail section of the fuselage.
ENGINE VIEW The left and right hand sides of the APIC APU are shown.
TDTI / BUC / ATA 49
Issue: 01/01
Revision: 31.01.2009
Page 18
A318/A319/A320/A321 CFM 56 / Level 1
Austrian Technical Training School Notes - For Training Purposes Only
COMPONENT LOCATION - ENGINE VIEW
TDTI / BUC / ATA 49
Issue: 01/01
Revision: 31.01.2009
Page 19
A318/A319/A320/A321 CFM 56 / Level 1
Austrian Technical Training School Notes - For Training Purposes Only
ELECTRONIC CONTROL BOX (ECB) The ECB is in the aft cargo compartment, RH side.
TDTI / BUC / ATA 49
Issue: 01/01
Revision: 31.01.2009
Page 20
A318/A319/A320/A321 CFM 56 / Level 1
Austrian Technical Training School Notes - For Training Purposes Only
COMPONENT LOCATION - ELECTRONIC CONTROL BOX (ECB)
TDTI / BUC / ATA 49
Issue: 01/01
Revision: 31.01.2009
Page 21
A318/A319/A320/A321 CFM 56 / Level 1
Austrian Technical Training School Notes - For Training Purposes Only
AIR INTAKE FLAP The APU has an air intake flap. The intake flap is open when the APU MASTER SWitch is selected ON and closes when the MASTER SWitch is selected OFF. When open, supplies air to the APU inlet for combustion and pneumatic supply.
TDTI / BUC / ATA 49
Issue: 01/01
Revision: 31.01.2009
Page 22
A318/A319/A320/A321 CFM 56 / Level 1
Austrian Technical Training School Notes - For Training Purposes Only
COMPONENT LOCATION - AIR INTAKE FLAP
TDTI / BUC / ATA 49
Issue: 01/01
Revision: 31.01.2009
Page 23
A318/A319/A320/A321 CFM 56 / Level 1
Austrian Technical Training School Notes - For Training Purposes Only
MAINTENANCE/TEST FACILITIES Using the MCDU, you can have access to the Centralized Fault Display System (CFDS) fault messages of the APU system. Specific Built-In Test Equipment (BITE) tests are available as well.
TDTI / BUC / ATA 49
Issue: 01/01
Revision: 31.01.2009
Page 24
A318/A319/A320/A321 CFM 56 / Level 1
Austrian Technical Training School Notes - For Training Purposes Only
MAINTENANCE/TEST FACILITIES
TDTI / BUC / ATA 49
Issue: 01/01
Revision: 31.01.2009
Page 25
A318/A319/A320/A321 CFM 56 / Level 1
Austrian Technical Training School Notes - For Training Purposes Only
SAFETY PRECAUTIONS When you work on A/C, make sure that you obey all the Aircraft Maintenance Manual (AMM) safety procedures. This will prevent injury to persons and/or damage to the A/C. Here is an overview of main safety precautions related to the APU. Make sure that you use the correct personal protection when you work on the APU, as fuel and oil are poisonous. Do not touch the APU until it is sufficiently cool. If you operate the APU with the APU access doors open or removed, make sure that you have the correct fire fighting equipment available. The onboard APU fire extinguishing system is not sufficient when these doors are not closed.
TDTI / BUC / ATA 49
Issue: 01/01
Revision: 31.01.2009
Page 26
A318/A319/A320/A321 CFM 56 / Level 1
Austrian Technical Training School Notes - For Training Purposes Only
SAFETY PRECAUTIONS
TDTI / BUC / ATA 49
Issue: 01/01
Revision: 31.01.2009
Page 27
A318/A319/A320/A321 CFM 56 / Level 1
Austrian Technical Training School Notes - For Training Purposes Only
This Page Intentionally Left Blank
TDTI / BUC / ATA 49
Issue: 01/01
Revision: 31.01.2009
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