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Airbus A350 Technical Training Manual
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Airbus A350 Technical Training Manual

Airbus A350 Technical Training Manual

T1+t2 - rr trent xwb hydraulic power
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A350
TECHNICAL TRAINING MANUAL
MAINTENANCE COURSE - T1+T2 - RR Trent XWB
Hydraulic Power

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Summary of Contents for Airbus A350

  • Page 1 A350 TECHNICAL TRAINING MANUAL MAINTENANCE COURSE - T1+T2 - RR Trent XWB Hydraulic Power...
  • Page 3 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 AIRBUS S.A.S. AIRBUS Environmental Recommendation Please consider your environmental responsability before printing this document.

  • Page 5: Hydraulic Power

    A350 TECHNICAL TRAINING MANUAL HYDRAULIC POWER Hydraulic System Description (2/3) ......2 Hydraulic System Maintenance (3) ......50 Hydraulic System Control and Indicating (2/3) .
  • Page 6 A350 TECHNICAL TRAINING MANUAL HYDRAULIC SYSTEM DESCRIPTION (2/3) - The Nose Wheel Steering (NWS) Generalities - The Nose Landing Gear (NLG) extension/retraction system - The normal and parking brakes - "The Yellow group" There are two main hydraulic-power systems, the Green and the Yellow - The FWD and AFT Cargo Door Actuation System (CDAS).
  • Page 7 A350 TECHNICAL TRAINING MANUAL GENERALITIES MAINTENANCE COURSE - T1+T2 - RR Trent XWB HYDRAULIC SYSTEM DESCRIPTION (2/3) Jul 10, 2014 29 - Hydraulic Power Page 3...
  • Page 8 A350 TECHNICAL TRAINING MANUAL HYDRAULIC SYSTEM DESCRIPTION (2/3) System Description Reservoir The reservoirs are the fluid storage devices in the systems. Each hydraulic system has a reservoir of the same type but with different capacities. Their function is to supply the pressurized fluid to the pumps.
  • Page 9 A350 TECHNICAL TRAINING MANUAL SYSTEM DESCRIPTION - RESERVOIR ... LOW-PRESSURE RETURN MANIFOLD MAINTENANCE COURSE - T1+T2 - RR Trent XWB HYDRAULIC SYSTEM DESCRIPTION (2/3) Jul 10, 2014 29 - Hydraulic Power Page 5...
  • Page 10 A350 TECHNICAL TRAINING MANUAL HYDRAULIC SYSTEM DESCRIPTION (2/3) Case Drain Manifold System Description (continued) There are four Case Drain (CD) manifolds, one for each EDP. They Fire ShutOff Valve are installed in the front spar (Yellow system) and the rear spar (Green There are Fire ShutOff Valves (FSOVs) in the suction lines from the system) of the wing.
  • Page 11 A350 TECHNICAL TRAINING MANUAL SYSTEM DESCRIPTION - FIRE SHUTOFF VALVE ... HYDRAULIC HEAT EXCHANGER MAINTENANCE COURSE - T1+T2 - RR Trent XWB HYDRAULIC SYSTEM DESCRIPTION (2/3) Jul 10, 2014 29 - Hydraulic Power Page 7...
  • Page 12 A350 TECHNICAL TRAINING MANUAL HYDRAULIC SYSTEM DESCRIPTION (2/3) The system manifold is connected to the system pressure line from System Description (continued) the EDPs. It also receives and filters the fluid from the EMP and the GSP and sends it to the system.
  • Page 13 A350 TECHNICAL TRAINING MANUAL SYSTEM DESCRIPTION - ELECTRIC MOTOR PUMP (EMP) ... SYSTEM MANIFOLD MAINTENANCE COURSE - T1+T2 - RR Trent XWB HYDRAULIC SYSTEM DESCRIPTION (2/3) Jul 10, 2014 29 - Hydraulic Power Page 9...
  • Page 14 A350 TECHNICAL TRAINING MANUAL HYDRAULIC SYSTEM DESCRIPTION (2/3) Reservoir Description The Green reservoir is installed on the inner right side of the rear belly fairing. The Yellow reservoir is installed in the MLG bay. MAINTENANCE COURSE - T1+T2 - RR Trent XWB...
  • Page 15 A350 TECHNICAL TRAINING MANUAL RESERVOIR DESCRIPTION MAINTENANCE COURSE - T1+T2 - RR Trent XWB HYDRAULIC SYSTEM DESCRIPTION (2/3) Jul 10, 2014 29 - Hydraulic Power Page 11...
  • Page 16 A350 TECHNICAL TRAINING MANUAL HYDRAULIC SYSTEM DESCRIPTION (2/3) Reservoir Description (continued) Reservoir Pressurization/Depressurization The reservoirs are the fluid storage devices in the systems. Their function is to supply hydraulic fluid to the EDPs, the EMPs and the cargo door hydraulic auxiliary pump.
  • Page 17 A350 TECHNICAL TRAINING MANUAL RESERVOIR DESCRIPTION - RESERVOIR PRESSURIZATION/DEPRESSURIZATION MAINTENANCE COURSE - T1+T2 - RR Trent XWB HYDRAULIC SYSTEM DESCRIPTION (2/3) Jul 10, 2014 29 - Hydraulic Power Page 13...
  • Page 18 A350 TECHNICAL TRAINING MANUAL HYDRAULIC SYSTEM DESCRIPTION (2/3) Reservoir Description (continued) Reservoir Fluid-Level Indications The HMCAs in the CPIOMs monitor, with analog signals: - The hydraulic fluid quantity in the reservoir with a quantity transmitter (level transducer) - The hydraulic fluid temperature in the reservoir with temperature sensors.
  • Page 19 A350 TECHNICAL TRAINING MANUAL RESERVOIR DESCRIPTION - RESERVOIR FLUID-LEVEL INDICATIONS MAINTENANCE COURSE - T1+T2 - RR Trent XWB HYDRAULIC SYSTEM DESCRIPTION (2/3) Jul 10, 2014 29 - Hydraulic Power Page 15...
  • Page 20 A350 TECHNICAL TRAINING MANUAL HYDRAULIC SYSTEM DESCRIPTION (2/3) Reservoir Description (continued) Reservoir Filling The primary components of the reservoir filling system are installed on the Green GSP: - Filling selector valve which is used for manual selection of the reservoir you will fill...
  • Page 21 A350 TECHNICAL TRAINING MANUAL RESERVOIR DESCRIPTION - RESERVOIR FILLING MAINTENANCE COURSE - T1+T2 - RR Trent XWB HYDRAULIC SYSTEM DESCRIPTION (2/3) Jul 10, 2014 29 - Hydraulic Power Page 17...
  • Page 22 A350 TECHNICAL TRAINING MANUAL HYDRAULIC SYSTEM DESCRIPTION (2/3) Reservoir Description (continued) Reservoir Air Bleeding On bootstrap reservoirs, it is necessary to bleed the air that goes into the system and that is held in the reservoir. A special bleed device does this task automatically, with no input from the maintenance or flight crew.
  • Page 23 A350 TECHNICAL TRAINING MANUAL RESERVOIR DESCRIPTION - RESERVOIR AIR BLEEDING & RESERVOIR DRAINAGE MAINTENANCE COURSE - T1+T2 - RR Trent XWB HYDRAULIC SYSTEM DESCRIPTION (2/3) Jul 10, 2014 29 - Hydraulic Power Page 19...
  • Page 24 A350 TECHNICAL TRAINING MANUAL HYDRAULIC SYSTEM DESCRIPTION (2/3) Accumulator Depressurization The high-pressure hydraulic accumulator is a metal bellow accumulator pre-charged with helium. Maintenance is not necessary for the accumulator thus, it is not necessary and not possible to do a refill of the gas charge of this equipment.
  • Page 25 A350 TECHNICAL TRAINING MANUAL ACCUMULATOR DEPRESSURIZATION MAINTENANCE COURSE - T1+T2 - RR Trent XWB HYDRAULIC SYSTEM DESCRIPTION (2/3) Jul 10, 2014 29 - Hydraulic Power Page 21...
  • Page 26 A350 TECHNICAL TRAINING MANUAL HYDRAULIC SYSTEM DESCRIPTION (2/3) FSOV and EDP Logic Operation Each FSOV can be controlled: - Manually with the ENG FIRE pushbutton of the related engine on the overhead panel. This procedure is reversible. You can open the FSOV again if you push the ENG FIRE pushbutton.
  • Page 27 A350 TECHNICAL TRAINING MANUAL FSOV AND EDP LOGIC OPERATION MAINTENANCE COURSE - T1+T2 - RR Trent XWB HYDRAULIC SYSTEM DESCRIPTION (2/3) Jul 10, 2014 29 - Hydraulic Power Page 23...
  • Page 28 A350 TECHNICAL TRAINING MANUAL HYDRAULIC SYSTEM DESCRIPTION (2/3) Engine-Driven-Pump Disengagement For deactivation, a declutch mechanism is used to disconnect the EDP from the engine AGB. If you operate the declutch mechanism, the rotation/torque from the engine cannot be transmitted to the EDP. Thus, the EDP cannot turn and the supply of hydraulic power is stopped.
  • Page 29 A350 TECHNICAL TRAINING MANUAL ENGINE-DRIVEN-PUMP DISENGAGEMENT MAINTENANCE COURSE - T1+T2 - RR Trent XWB HYDRAULIC SYSTEM DESCRIPTION (2/3) Jul 10, 2014 29 - Hydraulic Power Page 25...
  • Page 30 A350 TECHNICAL TRAINING MANUAL HYDRAULIC SYSTEM DESCRIPTION (2/3) about dangerous operation to the HMCA. The MCPU can start the Electric-Motor-Pump Logic Operation EMP with an EMP start command signal from the HMCA. The MCPU can stop the EMP if it finds unusual EMP operation.
  • Page 31 A350 TECHNICAL TRAINING MANUAL the EMP faults directly to the CPIOM (HMCA) if the usual communication from the CRDC/AFDX is not possible. MAINTENANCE COURSE - T1+T2 - RR Trent XWB HYDRAULIC SYSTEM DESCRIPTION (2/3) Jul 10, 2014 29 - Hydraulic Power...
  • Page 32 A350 TECHNICAL TRAINING MANUAL ELECTRIC-MOTOR-PUMP LOGIC OPERATION - ELECTRIC-MOTOR-PUMP LOGIC OPERATION MAINTENANCE COURSE - T1+T2 - RR Trent XWB HYDRAULIC SYSTEM DESCRIPTION (2/3) Jul 10, 2014 29 - Hydraulic Power Page 28...
  • Page 33 A350 TECHNICAL TRAINING MANUAL This Page Intentionally Left Blank MAINTENANCE COURSE - T1+T2 - RR Trent XWB HYDRAULIC SYSTEM DESCRIPTION (2/3) Jul 10, 2014 29 - Hydraulic Power Page 29...
  • Page 34 A350 TECHNICAL TRAINING MANUAL HYDRAULIC SYSTEM DESCRIPTION (2/3) Electric-Motor-Pump Logic Operation (continued) System Manifold: Isolation Valve Control The normal position of the system manifold isolation-valve is de-energized in the closed position. The hydraulic fluid is moved from the EMP or the GSP to the auxiliary hydraulic system (cargo door or braking).
  • Page 35 A350 TECHNICAL TRAINING MANUAL ELECTRIC-MOTOR-PUMP LOGIC OPERATION - SYSTEM MANIFOLD: ISOLATION VALVE CONTROL MAINTENANCE COURSE - T1+T2 - RR Trent XWB HYDRAULIC SYSTEM DESCRIPTION (2/3) Jul 10, 2014 29 - Hydraulic Power Page 31...
  • Page 36 HYDRAULIC SYSTEM DESCRIPTION (2/3) Temperature Control The A350 hydraulic system is heat controlled to keep the fluid temperature in a certain range (between 20 deg. C and 95 deg. C) in the reservoir during the flight, in usual conditions. The lower temperature limit decreases the fluid friction loss in the tubing network and gives the best dimension for the tubing.
  • Page 37 A350 TECHNICAL TRAINING MANUAL TEMPERATURE CONTROL MAINTENANCE COURSE - T1+T2 - RR Trent XWB HYDRAULIC SYSTEM DESCRIPTION (2/3) Jul 10, 2014 29 - Hydraulic Power Page 33...
  • Page 38 A350 TECHNICAL TRAINING MANUAL HYDRAULIC SYSTEM DESCRIPTION (2/3) Temperature Control The hydraulic system cooling uses two fuel-submerged HHXs for each system. The HHXs decrease the temperature of the hydraulic fluid in the EDP CD flow. To do this, they use the colder fuel in the wing tank. The HHXs are installed in the wing tanks.
  • Page 39 A350 TECHNICAL TRAINING MANUAL TEMPERATURE CONTROL MAINTENANCE COURSE - T1+T2 - RR Trent XWB HYDRAULIC SYSTEM DESCRIPTION (2/3) Jul 10, 2014 29 - Hydraulic Power Page 35...
  • Page 40 A350 TECHNICAL TRAINING MANUAL HYDRAULIC SYSTEM DESCRIPTION (2/3) Seal Drain To keep the hydraulic compartment as clean as possible, the seal drain collects the hydraulic fluid leakage in transparent tanks. In this system, fluid drains into the recovery tanks by the effect of gravity. If a tank is full, an overflow-pipe drains the unwanted fluid into the MLG bay.
  • Page 41 A350 TECHNICAL TRAINING MANUAL SEAL DRAIN MAINTENANCE COURSE - T1+T2 - RR Trent XWB HYDRAULIC SYSTEM DESCRIPTION (2/3) Jul 10, 2014 29 - Hydraulic Power Page 37...
  • Page 42 A350 TECHNICAL TRAINING MANUAL HYDRAULIC SYSTEM DESCRIPTION (2/3) Yellow Hydraulic System Review Lets review the Yellow hydraulic system. MAINTENANCE COURSE - T1+T2 - RR Trent XWB HYDRAULIC SYSTEM DESCRIPTION (2/3) Jul 10, 2014 29 - Hydraulic Power Page 38...
  • Page 43 A350 TECHNICAL TRAINING MANUAL YELLOW HYDRAULIC SYSTEM REVIEW MAINTENANCE COURSE - T1+T2 - RR Trent XWB HYDRAULIC SYSTEM DESCRIPTION (2/3) Jul 10, 2014 29 - Hydraulic Power Page 39...
  • Page 44 A350 TECHNICAL TRAINING MANUAL HYDRAULIC SYSTEM DESCRIPTION (2/3) Green Hydraulic System On the Green system, the priority valve gives priority to the primary flight controls. It isolates the heavy load user (MLG extension/retraction) if there is low hydraulic pressure. MAINTENANCE COURSE - T1+T2 - RR Trent XWB...
  • Page 45 A350 TECHNICAL TRAINING MANUAL GREEN HYDRAULIC SYSTEM MAINTENANCE COURSE - T1+T2 - RR Trent XWB HYDRAULIC SYSTEM DESCRIPTION (2/3) Jul 10, 2014 29 - Hydraulic Power Page 41...
  • Page 46 A350 TECHNICAL TRAINING MANUAL HYDRAULIC SYSTEM DESCRIPTION (2/3) Monitoring and Indicating Reservoir Each sensor installed on the reservoir sends the related data as analog signals to the HMCRF hosted in CRDC. The HMCRF changes these analog signals into digital signals. The data are transmitted to the HMCA through the AFDX.
  • Page 47 A350 TECHNICAL TRAINING MANUAL MONITORING AND INDICATING - RESERVOIR MAINTENANCE COURSE - T1+T2 - RR Trent XWB HYDRAULIC SYSTEM DESCRIPTION (2/3) Jul 10, 2014 29 - Hydraulic Power Page 43...
  • Page 48 A350 TECHNICAL TRAINING MANUAL HYDRAULIC SYSTEM DESCRIPTION (2/3) Monitoring and Indicating (continued) Supply Part Monitoring The FSOV position is monitored by the limit switches and is shown on the hydraulic ECAM page. The EDP can be disengaged on the ground. This is done manually. A switch installed on the EDP will monitor the disengage position.
  • Page 49 A350 TECHNICAL TRAINING MANUAL MONITORING AND INDICATING - SUPPLY PART MONITORING MAINTENANCE COURSE - T1+T2 - RR Trent XWB HYDRAULIC SYSTEM DESCRIPTION (2/3) Jul 10, 2014 29 - Hydraulic Power Page 45...
  • Page 50 A350 TECHNICAL TRAINING MANUAL HYDRAULIC SYSTEM DESCRIPTION (2/3) Monitoring and Indicating (continued) Distribution Part Monitoring The different sensors are connected to the CRDCs. This is not applicable to the case-drain temperature sensors which are directly connected to the applications. These sensors are used for indicating but also for the flight controls and the Landing Gear system for example.
  • Page 51 A350 TECHNICAL TRAINING MANUAL MONITORING AND INDICATING - DISTRIBUTION PART MONITORING MAINTENANCE COURSE - T1+T2 - RR Trent XWB HYDRAULIC SYSTEM DESCRIPTION (2/3) Jul 10, 2014 29 - Hydraulic Power Page 47...
  • Page 52 A350 TECHNICAL TRAINING MANUAL HYDRAULIC SYSTEM DESCRIPTION (2/3) Monitoring and Indicating (continued) Filter Clogging Monitoring There are many filters installed in the hydraulic system. The HP and return filters have electrical clogging indicators (differential pressure indicators). For the Case Drain Filters there are two absolute pressure transducers before and after the filter.
  • Page 53 A350 TECHNICAL TRAINING MANUAL MONITORING AND INDICATING - FILTER CLOGGING MONITORING MAINTENANCE COURSE - T1+T2 - RR Trent XWB HYDRAULIC SYSTEM DESCRIPTION (2/3) Jul 10, 2014 29 - Hydraulic Power Page 49...

  • Page 54: Hydraulic System Maintenance

    A350 TECHNICAL TRAINING MANUAL HYDRAULIC SYSTEM MAINTENANCE (3) Hydraulic Fuses The hydraulic fuses isolate the hydraulic system if there is high leakage, to prevent a hydraulic system loss. The hydraulic-rated fuses will start to close at a specified flow and will stay closed while the pressure on the upstream side is higher (30 psi) than on the downstream side.
  • Page 55 A350 TECHNICAL TRAINING MANUAL HYDRAULIC FUSES MAINTENANCE COURSE - T1+T2 - RR Trent XWB HYDRAULIC SYSTEM MAINTENANCE (3) Jul 10, 2014 29 - Hydraulic Power Page 51...
  • Page 56 A350 TECHNICAL TRAINING MANUAL HYDRAULIC SYSTEM MAINTENANCE (3) Hydraulic Fuses The fuse is flow-rated, thus it closes at a specified flow. Ground Support Equipment (GSE) is used to do a check of the closing mechanism of the fuse. With the hydraulic system pressurized, when the GSE is used and the flow is at the permitted limit, the fuse closes.
  • Page 57 A350 TECHNICAL TRAINING MANUAL HYDRAULIC FUSES MAINTENANCE COURSE - T1+T2 - RR Trent XWB HYDRAULIC SYSTEM MAINTENANCE (3) Jul 10, 2014 29 - Hydraulic Power Page 53...
  • Page 58 A350 TECHNICAL TRAINING MANUAL HYDRAULIC SYSTEM MAINTENANCE (3) Maintenance Procedure (Table: ATA 20-23-00). These allowances in the Kevlar Hoses Flight Cycle are related to the area where the Kevlar hose is installed. Kevlar-braided (Aramid fibers) hoses are used for high and low pressure lines.
  • Page 59 A350 TECHNICAL TRAINING MANUAL KEVLAR HOSES MAINTENANCE COURSE - T1+T2 - RR Trent XWB HYDRAULIC SYSTEM MAINTENANCE (3) Jul 10, 2014 29 - Hydraulic Power Page 55...
  • Page 60 A350 TECHNICAL TRAINING MANUAL HYDRAULIC SYSTEM CONTROL AND INDICATING (2/3) EMP, both of them appear in white color when the pumps are ready to Hydraulic System - General (2) operate but still in stand by condition. The EMPs indication on the ECAM Hydraulic page will disappear when The hydraulic system is controlled from different panels: the engines are confirmed running (To be checked).
  • Page 61 A350 TECHNICAL TRAINING MANUAL On the Hydraulic SD page there is a square to indicate the status of each . The hydraulic auxiliary pump. EDP. The indication can be: The Green GSP lets maintenance personnel: - Green in normal configuration when the pump operate to pressurize the .
  • Page 62 A350 TECHNICAL TRAINING MANUAL Reservoir refilling (Green Reservoir) (2) Green RSVR Depress. (From the Reservoir) (2) The connections to refill the hydraulic reservoirs are located at the Green To depressurize each reservoir, it is necessary to open the depressurization Ground Service Panel.
  • Page 63 A350 TECHNICAL TRAINING MANUAL - System overheat. EMP: Abnormal Operation (3) The temperature of the hydraulic system is monitored by different If the Electric Motor Pump (EMP) is faulty, the hydraulic system cannot temperature sensors: be powered on ground when engines are not running, unless ground cart - Two are located on each reservoir, is used.
  • Page 64 A350 TECHNICAL TRAINING MANUAL At the WD area a warning will inform about the "OVHT" condition and different blue memos will request the depressurization for the two EDPs connected to the respective hydraulic system and closure of the related FSOVs (via the SUPPLY ISOL red guarded P/B SWs).
  • Page 65 A350 TECHNICAL TRAINING MANUAL HYDRAULIC SYSTEM - GENERAL (2) ... HYDRAULIC FLUID ABNORMAL TEMPERATURE (3) MAINTENANCE COURSE - T1+T2 - RR Trent XWB HYDRAULIC SYSTEM CONTROL AND INDICATING (2/3) Jul 10, 2014 29 - Hydraulic Power Page 61...
  • Page 66 A350 TECHNICAL TRAINING MANUAL HYDRAULIC SYSTEM - GENERAL (2) ... HYDRAULIC FLUID ABNORMAL TEMPERATURE (3) MAINTENANCE COURSE - T1+T2 - RR Trent XWB HYDRAULIC SYSTEM CONTROL AND INDICATING (2/3) Jul 10, 2014 29 - Hydraulic Power Page 62...
  • Page 67 A350 TECHNICAL TRAINING MANUAL HYDRAULIC SYSTEM - GENERAL (2) ... HYDRAULIC FLUID ABNORMAL TEMPERATURE (3) MAINTENANCE COURSE - T1+T2 - RR Trent XWB HYDRAULIC SYSTEM CONTROL AND INDICATING (2/3) Jul 10, 2014 29 - Hydraulic Power Page 63...
  • Page 68 A350 TECHNICAL TRAINING MANUAL HYDRAULIC SYSTEM - GENERAL (2) ... HYDRAULIC FLUID ABNORMAL TEMPERATURE (3) MAINTENANCE COURSE - T1+T2 - RR Trent XWB HYDRAULIC SYSTEM CONTROL AND INDICATING (2/3) Jul 10, 2014 29 - Hydraulic Power Page 64...
  • Page 69 A350 TECHNICAL TRAINING MANUAL HYDRAULIC SYSTEM - GENERAL (2) ... HYDRAULIC FLUID ABNORMAL TEMPERATURE (3) MAINTENANCE COURSE - T1+T2 - RR Trent XWB HYDRAULIC SYSTEM CONTROL AND INDICATING (2/3) Jul 10, 2014 29 - Hydraulic Power Page 65...
  • Page 70 A350 TECHNICAL TRAINING MANUAL HYDRAULIC SYSTEM - GENERAL (2) ... HYDRAULIC FLUID ABNORMAL TEMPERATURE (3) MAINTENANCE COURSE - T1+T2 - RR Trent XWB HYDRAULIC SYSTEM CONTROL AND INDICATING (2/3) Jul 10, 2014 29 - Hydraulic Power Page 66...
  • Page 71 A350 TECHNICAL TRAINING MANUAL HYDRAULIC SYSTEM - GENERAL (2) ... HYDRAULIC FLUID ABNORMAL TEMPERATURE (3) MAINTENANCE COURSE - T1+T2 - RR Trent XWB HYDRAULIC SYSTEM CONTROL AND INDICATING (2/3) Jul 10, 2014 29 - Hydraulic Power Page 67...
  • Page 72 AIRBUS S.A.S. 31707 BLAGNAC cedex, FRANCE REFERENCE V2414251 JUNE 2014 PRINTED IN FRANCE AIRBUS S.A.S. 2014 ALL RIGHTS RESERVED AN EADS COMPANY...