Airbus A318 A319 A320 A321 Chapter 22 Auto Flight Aircraft Maintenance Manual – Revision 40 2012

Description

Airbus A318 A319 A320 A321 Chapter 22 Auto Flight Aircraft Maintenance Manual

The Airbus A318 A319 A320 A321 Chapter 22 Auto Flight Aircraft Maintenance Manual – Revision 40 2012 is a detailed technical reference devoted to ATA Chapter 22 Auto Flight systems on the A318, A319, A320 and A321. Across 1278 pages, it documents system architecture, control laws, cockpit controls and indications, computer interfaces, component arrangements, operational logic, servicing, removal and installation tasks, adjustment and operational tests, and fault-isolation functions associated with the aircraft automatic flight systems.

The material extends well beyond a basic description of autopilot operation. It follows the interaction between the Automatic Flight System, Flight Management and Guidance Computers, Flight Augmentation Computers, Flight Control Unit, Multipurpose Control and Display Units, aircraft displays, engine interfaces and related control functions. Numerous figures, block diagrams, architecture drawings, control-law diagrams and component illustrations support the technical explanations and maintenance procedures.

File Details

• Manual type: Aircraft Maintenance Manual – Chapter 22 Auto Flight
• Aircraft: Airbus A318, A319, A320 and A321
• Chapter: 22 – Auto Flight
• Revision: 40
• Date: May 01/12
• Language: English
• Pages: 1278
• File format: PDF

Automatic Flight System Architecture and Guidance

A substantial part of this Airbus A318 A319 A320 A321 Auto Flight maintenance manual explains how the Automatic Flight System is arranged and interconnected. The general Auto Flight section includes AFS component layouts, computer locations, overall architecture, cockpit controls and indications, engine interconnections, FAC information displayed on the Primary Flight Display, flight-director symbols, flight-mode annunciation, navaid selection and flight-management information displays.

The Autopilot/Flight Director material develops this further with descriptions of AP/FD components and cockpit controls, flight-director orders, level-change operation and interfaces with the flight-control system. Separate illustrations and explanations address rudder, pitch, aileron, spoiler and nose-wheel control, while the manual also traces AP/FD information transmitted to the PFDs and the relationship between the FMGCs and display systems.

Chapters Covered

• 22-00-00 Auto Flight – General
  • AFS component layout, computer locations, architecture, controls and indications, engine interfaces and PFD information
• 22-10-00 Autopilot/Flight Director
  • AP/FD architecture, flight-control interfaces, cockpit indication and operational tests
• 22-11-00 AP/FD Engagement
  • Engagement and disengagement logic, command monitoring, pitch, roll and yaw loops, locking logic and AP OFF warning
• 22-12-00 Cruise Modes
  • Speed control, HDG/TRK and NAV modes, localizer operation, altitude acquisition and hold, V/S and FPA modes, OPEN CLB, OPEN DES, EXPED and managed level changes
• 22-13-00 Common Modes
  • Takeoff, SRS, runway modes, ILS approach, LAND, LOC, GLIDE, ROLL OUT, FLARE, FINAL DES and GO AROUND
• 22-30-00 Autothrust
  • Controls, computer locations, system block diagram, thrust setting, throttle definition, throttle-control-unit checks and operational testing
• 22-31-00 Autothrust Engagement
  • Engage and disengage logic, engine isolation and A/THR warnings
• 22-32-00 Autothrust Modes
  • Mode activation, Alpha Floor protection, SPD/MACH law, A/THR basic loop and indications
• 22-60-00 Flight Augmentation
  • FAC component locations, layout and operational tests
• 22-61-00 Artificial Feel and Rudder Travel Limiting Computation
  • Rudder travel-limitation architecture, control law, changeover, monitoring and operational test
• 22-62-00 Rudder Trim Computation
  • Rudder trim function, architecture, actuator control, monitoring and operational test
• 22-62-11 / 22-62-12 / 22-62-21 Rudder Trim Components
  • Control switch, RUD TRIM/RESET pushbutton and rudder trim indicator removal and installation
• 22-63-00 Yaw Damper Computation
  • Yaw-damper architecture, servo-actuator interfaces, control law, monitoring and operational test
• 22-64-00 Configuration and Operational Speed Computation
  • FAC speed computations, FM weight/CG use, flight-path angle, Alpha Floor, windshear detection and low-energy warning
• 22-65-00 Engagement and Internal Monitoring
  • FAC engagement, computer and transmission monitoring, ADC and IRS processing, sensor monitoring and power-supply monitoring
• 22-66-00 Flight Augmentation Computer
  • FAC architecture, deactivation/reactivation and FAC removal and installation
• 22-67-00 FAC Electrical and Hydraulic Power Supply
  • 28VDC and 26VAC supplies, internal power and yaw-damper servo-actuator hydraulic supply
• 22-68-00 FAC Discrete/Analog Interfaces
  • FAC discrete and analog interface arrangements
• 22-69-00 FAC ARINC Bus Interfaces
  • ARINC interface architecture
• 22-70-00 Flight Management System
  • FMS architecture, navigation, lateral and vertical guidance, weight functions, FM data loading and MCDU operational tests
• 22-71-00 Flight Plan/Data Base
  • Flight-plan construction, departures, arrivals, approaches, secondary flight plans, MCDU pages, routes, waypoints, runways and holding patterns
• 22-72-00 Navigation/Lateral Functions
  • Position computation and updating, radio navigation, leg transitions, path errors, NAV engagement and flight-plan sequencing
• 22-73-00 Performance/Vertical Functions
  • Flight phases, predictions, takeoff, climb, descent, approach, speed control, weight, fuel and performance functions
• 22-74-00 Operational Use
  • MCDU front panel, display operation, page hierarchy and message handling
• 22-75-00 EIS Displays
  • FMGC/EIS interface, ND modes, flight-plan display, offset paths and pseudo waypoints
• 22-76-00 Data Link and Printer Functions
  • ACARS flight-plan initialization, takeoff-data functions, wind uplinks, reporting and print functions
• 22-81-00 Flight Control Unit
  • FCU controls, component location, internal arrangement, architecture, monitoring and changeover
• 22-81-12 Flight Control Unit Maintenance
  • FCU removal and installation
• 22-82-00 Multipurpose Control and Display Unit
  • MCDU interfaces, component location, front panel, functional layout, block diagram and switching logic
• 22-82-12 MCDU Maintenance
  • MCDU removal, installation and cleaning
• 22-83-00 Flight Management and Guidance Computer
  • FMGC front panel, internal arrangement, component location, architecture, power supply and connectors
• 22-83-34 FMGC Maintenance
  • FMGC removal and installation
• 22-84-00 FMGS Electrical Power Supply
  • Power supply of FMGCs, FCU, MCDUs and data-loader functions
• 22-85-00 FMGS Discrete/Analog Interfaces
  • Discrete and analog interfaces associated with the Flight Management and Guidance System
• 22-86-00 FMGS Bus Interfaces
  • FMGS bus-interface information
• 22-91-00 Fault Isolation Function – Principle
  • Fault detection and analysis, BITE functions, AFS menus, reports, LRU identification and ground scanning
• 22-92-00 AFS Fault Isolation
  • Automatic Flight System fault-isolation information
• 22-96-00 AFS Test
  • AFS test operation, test reports, troubleshooting data and operational test procedure
• 22-97-00 LAND CAT III Capability Test
  • LAND test logic and operational testing of LAND CAT III capability

Taken as a whole, the manual gives maintenance personnel a system-level view of how automatic guidance, autothrust, flight augmentation and flight management functions are generated, monitored, displayed and tested. The descriptive sections explain the operating logic and interfaces, while the maintenance portions bring that information into practical use through component access, removal and installation, servicing, functional checks, AFS diagnostic routines and system operational testing.

Flight Management, Navigation and Performance Functions

The Flight Management System coverage is especially extensive. It documents general FMS architecture together with navigation, radio-navigation, lateral-guidance, weight and prediction/vertical-guidance architecture. The manual describes how lateral and vertical flight plans underpin navigation, guidance and performance calculations, and it follows the relationship between the FMGCs, MCDUs, PFDs, NDs, FCU and other aircraft systems.

Flight-plan and database material covers departure, arrival, approach and go-around segments; flight-plan initialization; secondary and temporary flight plans; lateral and vertical revision pages; wind entry; stored and new navaids, waypoints, runways and routes; holding patterns; and numerous MCDU page functions. Navigation material includes radio positions, FMGC position computation, localizer and position updating, navigation mode selection, IR alignment, coordinate entry, leg-transition types and lateral-path-error calculations.

Vertical and performance functions include flight phases, takeoff parameters, climb and descent predictions, altitude constraints, step climb, theoretical descent and approach profiles, speed-selection effects, fuel and weight displays, engine-out display functions and fuel predictions. This gives the A318 A319 A320 A321 Chapter 22 Auto Flight manual strong value for technicians who need to understand not merely an individual component but the information flow and functional relationships throughout the FMGS.

Maintenance, Component Replacement and System Testing

The manual contains practical component-maintenance tasks as well as descriptive material. Removal and installation procedures are provided for components including the rudder-trim control switch, RUD TRIM/RESET pushbutton switch, rudder-trim indicator, Flight Augmentation Computer, Flight Control Unit, Multipurpose Control and Display Unit and Flight Management and Guidance Computer. The MCDU section also includes a cleaning procedure.

Operational and adjustment/test material addresses numerous Auto Flight functions. Examples include tests of takeover and priority pushbuttons, autopilot disengagement and locking devices, vertical-speed and heading-hold modes, FCU lighting, FCU indicators and displays, altitude alert warning, FAC functions, rudder travel limiting, rudder trim, yaw damper and MCDU functions. The AFS test chapter explains computer safety-test information, discrete and ARINC input checks, plausibility testing, MCDU test reporting and troubleshooting information. LAND CAT III capability testing is also included as a dedicated section.

Fault Isolation and BITE Information

For troubleshooting work, Chapter 22 includes dedicated fault-isolation material rather than limiting the technician to system theory. The Fault Isolation Function section describes detection and analysis principles, FAC and FMGC BITE levels, report pages, LRU identification, ground scanning and examples of report utilization. The separate AFS Fault Isolation and AFS Test sections extend that workflow with system integrity testing after LRU replacement and test-result analysis through the MCDU.

This combination of functional diagrams, system logic and diagnostic information is particularly useful when a maintenance action requires understanding which computer or interface participates in a function before a component is removed or a test is run.

Instant PDF Maintenance Reference

The Airbus A318 A319 A320 A321 Chapter 22 Auto Flight Aircraft Maintenance Manual – Revision 40 2012 supports detailed work on autopilot and flight-director functions, autothrust, FAC-controlled augmentation functions, flight management and guidance, FCU and MCDU equipment, FMGC installations, system interfaces, operational tests and AFS fault-isolation tasks. Using the documented architecture, procedures, tests and control-system information helps technicians follow the specific Chapter 22 maintenance sequence rather than relying on generalized system descriptions. The manual is delivered as an instant PDF after purchase, with no physical shipping required; it can be opened on compatible computers, tablets or phones and printed as needed for workshop or reference use.