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FOREWORD DISCLAIMER 3 AUTHORS' NOTE The THALES NEW FM as installed on A318/319/320/321 aircraft is part of the Flight Management & Guidance System (FMGS), which provides Flight Management (FM) and Flight Guidance (FG) functions. This guide was written by pilots for pilots. It provides information on utilization of the Flight Management (FM) functions of the FMGS.
VERTICAL F-PLN management SEC F-PLN FUEL monitoring NAVIGATION management & monitoring ENGINE-OUT OPERATION DATA LINK PRINT FUNCTION PART IV – FMGS DEGRADED OPERATIONS OVERVIEW FMGC RESETS AND FAILURES MCDU ANOMALIES OTHER DEGRADED OPERATIONS PART V – APPENDICES MESSAGES MCDU NAMING AND FORMAT...
MCDU. Parts are divided into chapters and subjects. Tab dividers showing Part titles and numbers are provided for prompt identification. Part I - GENERAL DESCRIPTION is an overview of the FMGS and its philosophy, FMGC operation, MCDU functions and operations (for Abbreviations see PART V - Appendices).
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FMS GENERAL DESCRIPTION INTRODUCTION 1 Part I: Chapter 1 – INTRODUCTION The THALES Flight Management & Guidance System (FMGS), as installed on Airbus Single-Aisle Family (A318/319/320/321), provides Flight Management (FM) and Flight Guidance (FG) functions. The main FM functions are: −...
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FMS GENERAL DESCRIPTION SYSTEM OVERVIEW The main interfaces for crew inputs to FMGS are FCU, MCDUs and Thrust Levers (T/L). Outputs of FMGS are monitored on the EFIS (PFD and ND). The FCU is the short-term (tactical) interface, and has the following functions: −...
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The EFIS Displays: The PFDs and NDs are the visual interface which enables each pilot to continuously monitor status and operation of the FMGS. EFIS Control Panel allows the pilot to select the ND mode, range and navigation features. The Flight Mode Annunciator (FMA) on the PFD indicates: −...
FMS GENERAL DESCRIPTION FMGS OPERATION 3 The Flight Management and Guidance System (FMGS) provides guidance from takeoff, through climb, cruise and descent to approach and landing. It provides the following capabilities: − Pre-flight: definition of the required route and prediction of the optimum profile and speeds.
FMS GENERAL DESCRIPTION FMGS OPERATION 5 FMGC1 is the Master except when: − AP2 is engaged singly (normal situation when the RHS pilot is PF). When both APs are engaged for ILS approach, FMGC1 becomes the "master". − FD2 is ON, FD1 is OFF and both APs disengaged.
The FMS computes track, profile and predictions of the Temporary Flight Plan, according to the entered revisions. This specific Thales feature enables the pilot to visualize revisions on the ND, and thus avoid incorrect entries. Because of this feature, it is not necessary to insert the Temporary Flight Plan after each revision in turn, which would waste time.
FMS GENERAL DESCRIPTION FMGS OPERATION 7 3.3. NAVIGATION/FLIGHT MANAGEMENT Navigation FMGC position The prime function of the FMGC is to compute an accurate position and ground speed based on the navigation data available. FMGC1 uses IRS1/IRS2/IRS3, GPS1, VOR1/DME1/LOC1/MLS1, FMGC2 uses IRS1/IRS2/IRS3, GPS2, VOR2/DME2/LOC2/MLS2,...
FMS GENERAL DESCRIPTION FMGS OPERATION 9 EPE (Estimated Position Error) The FMGC position is estimated with 95% probability to be within a probability circle of uncertainty. The ESTIMATED circle radius is shown on the PROGRESS page. By comparison of REQUIRED value with ESTIMATED value, the system determines a HIGH/LOW accuracy level .
FMS GENERAL DESCRIPTION FMGS OPERATION 11 Guidance modes Guidance modes of the FMGC are of two types: − Managed modes provide guidance computed by the FMGC to follow the flight plan track, profile and/or speed schedule, as programmed in the MCDU. To engage a Managed mode, pilot action is to push the appropriate selector knob on the FCU.
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FMS GENERAL DESCRIPTION FMGS OPERATION 13 Speed (Cont'd) MANAGED SELECTED J=J=J= ACT MODE UTC DEST EFOB ACT MODE UTC DEST EFOB SELECTED 1544 MANAGED 1541 PRED TO FL070 PRED TO FL070 MANAGED DIST MANAGED DIST 250/.79 250/.79 1420 MCDU SELECTED 250/.40...
FMS GENERAL DESCRIPTION MCDU GENERAL Information processed by the FMGS is presented on the various pages, which can be displayed on the MCDU screen. The pages are accessed either: − Directly by pressing the PAGE keys, − By pressing the LINE SELECT keys, −...
For layout of MCDU keyboard (see fold-out at end of the Guide). This chapter describes the normal crew procedures to initialize the FMGS in the preflight phase. In this phase flight data are entered or confirmed via MCDU pages in the following sequence: −...
FLIGHT PHASES PREFLIGHT Enter History Wind (when applicable) The FMGS memorizes the last winds of the previous flight. The HISTORY WIND prompt allows these winds to be inserted for the next flight. In this case: HISTORY WIND [1R]..Press Verify the data.
[ ]°/[ ] FL310 300°/030/FL200 Insertion of CRZ/DES/ALTN winds WIND 290°/020/FL100 REQUEST* during preflight improves the PREV accuracy of the computed FMGS F- [ ]°/[ ]/[ PHASE> PLN. Otherwise these insertions may UPDATE UPDATE be done in flight. {CANCEL INSERT*...
On ND, the RTE is displayed as a {FINO5H dashed yellow line. FIST5A {FIST5H Due to multiple TMPY F-PLN concept on {GAI5A Thales FM2, it is not required to insert TMPY EOSID TMPY F-PLN until it has been completed <F-PLN NONE £$ and checked.
Entry of alternate route may be completed either during Pre-flight phase, or during Cruise phase before descent, at crew’s discretion (see Ch.5 for procedure). The benefit to insert during preflight is to give more accuracy to the FMGS fuel prediction. TMPY F-PLN insert When the entire route is inserted, TMPY F-PLN....Insert...
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1.0/0030 62.4 EXTRA/TIME 1.4/0038 If a F-PLN & CRZ FL have been entered, the FMGS will now compute time & fuel predictions, including turn radius, lateral and vertical profile. Trajectory is displayed on ND, time and fuel predictions are displayed on F-PLN pages.
Enter V1, VR, V2 in their respective fields. Ex:V1 141, VR 141, V2 143. TAKE OFF V1 & VR are displayed on PFD FLP RETR F=150 speed tape, V2 is sent to FMGS for SLT RETR TO SHIFT SRS mode. S=192 [M][ CLEAN...
0000. LFBO14R 0000 141/ An ETT may be entered to enable the H144° BRG144° 0000 153/ FMGS to provide time predictions at C144° TRK144° the destination and at each WPT in D144H} 0002 " / *3130 C356° the F-PLN.
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FLIGHT PHASES TAKE-OFF 3 3.1. SWITCHING CONDITIONS The FMGS transitions automatically from the PREFLIGHT phase to the TAKE-OFF phase when the following conditions are met: − Thrust levers set to the FLEX or TOGA detent, and, − Left and right N1 > 85% for CFM engines, or, −...
FLIGHT PHASES CLIMB 3 4.1. SWITCHING CONDITIONS The FMGS switches automatically from TAKE-OFF to CLIMB phase: When A/C reaches acceleration altitude (ACC), or, By engagement of another vertical mode. Acceleration altitude (ACC) is shown on TAKE OFF FLP RETR TAKE OFF PERF page [5L]...
FLIGHT PHASES CLIMB 5 4.2. NORMAL CLIMB If lateral and vertical managed modes are engaged the FMGS provides guidance to maintain track and profile of ACTIVE F-PLN. On PFD at transition altitude (TRANS ALT), BARO REF flashes, reminding pilot to set STD.
ACTIVE F-PLN are taken into account by the FMGS. It is the recommended climb speed mode. If SELECTED speed is engaged, FMGS will maintain speed as selected by pilot on FCU. If a specific speed is required OPM= FCU SPD ....
FLIGHT PHASES CRUISE 3 5.1. SWITCHING CONDITIONS The FMGS switches automatically from CLIMB to CRUISE phase when A/C reaches the cruise altitude entered on PROG page. FMA ALT CRZ is displayed, MCDU: − PERF page title becomes CRZ green, − PROG page title becomes CRUISE green.
CRUISE 5.2. REACHING CRUISE FLIGHT LEVEL FMA ........Check ALT CRZ is displayed. If ALT is displayed FMGS is still in CLIMB phase. If the assigned altitude is lower than the CRZ ALT entered in PROG page, the FMGS will not switch to CRUISE phase.
If MANAGED speed is engaged, cruise speed is optimized, constraints and entered speed data in ACTIVE F-PLN are taken into account by the FMGS. If SELECTED speed is engaged, FMGS will maintain speed as selected by pilot on FCU. To change speed K T U= FCU SPD/MACH ..
CRUISE THV001 NAV. REC MAX FL360 FL361 FL390 If a higher ALT is selected, FMGS <REPORT switches for CRUISE to CLIMB phase UPDATE AT for the time of level change; then BRG /DIST switches again to CRUISE. ---° /----.- TO PREDICTIVE <GPS...
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ACTIVATE APPR PHASE prompt [6L] ACTIVATE NEXT {APPR PHASE PHASE> As for CLB page. Enables to switch FMGS directly to APPROACH phase: e.g. for diversion. If activated by error, re-enter CRZ A in PROG page. ACT MODE UTC DEST EFOB...
FL360 FL388 It cannot be cleared, but may be <REPORT modified by a new entry. UPDATE AT Entering a higher ALT switches FMGS to BRG /DIST CLIMB phase. 355° /366.5 EGLL27R To enter a lower ALT distance to DEST PREDICTIVE <GPS...
FLIGHT PHASES DESCENT 3 6.1. SWITCHING CONDITIONS The FMGS switches automatically from CRUISE to DESCENT phase when: − Reaching TOP of DESCENT (T/D) as computed in ACTIVE F-PLN, or, − A lower ALT is selected on FCU at less than 200 NM to DEST (Early Descent), −...
Descent is initiated, THR IDLE − Thrust decreases to I DLE if no 1FD2 A/THR re-pressurization segment is computed, − FMGS switch t o descent phase, ACT MODE UTC DEST EFOB MANAGED 2230 − Speed t arget is indicated on PERF DES page.
Speed is optimized; constraints and entered J=J=J= speed data in ACTIVE F-PLN are taken into account by the FMGS. It is the recommended descent speed mode. Target speed is shown by a double magenta line, but to avoid excessive thrust variations, an...
PERF Page shows − SELECTED [1L] with THR I associated value [4L], 1FD2 FMA displays THR IDLE A/THR − or MACH/SPEED if FMGS needs to adjust thrust to maintain profile. ACT MODE UTC DEST EFOB SELECTED 2248 PRED TO FL150...
[2R]. Selected vertical modes (OP DES – V/S) The vertical profile is not maintained by the FMGS. In OP DES mode, descent is IDLE thrust maintaining target speed. In V/S mode, thrust is adjusted to maintain target speed; if idle thrust is not enough to assure V/S requested, target speed is not maintained.
{APPR PHASE PHASE> − Vertical deviation symbol moves up, − ND: The "broken" blue arrow( shows the intercept point where the FMGS profile will be rejoined, − PROG page indicates VDEV [2R] from computed profile. MACH 1FD2 A/THR...
UTC DEST EFOB This message is cleared by the CLR key MANAGED 1903 only if speed is SELECTED, or when (T/D) FMGS transitions to DESCENT phase. MANAGED DIST 1841 Deviation from computed profile is indicated on PROG page VDEV [2R].
When clear, [2R] field defaults to FCU selected ALT. ACTIVATE APPR PHASE prompt [6L]: Same rule applies as described for CLB & CRZ pages. Enables to switch FMGS directly to APPROACH phase in case and anticipate deceleration for approach. See also Part II: Approach NEXT PHASE prompt [6R]: Enables access to APPR &...
----- FL393 transitioning to DESCENT phase, − Entering a value in CRZ field switches <REPORT VDEV=- UPDATE AT the FMGS in CRUISE phase, BRG /DIST − REC MAX. 310° /49.3 EGLL27R PREDICTIVE See Part II – CH 5 Cruise <GPS...
FLIGHT PHASES APPROACH 3 7.1. SWITCHING CONDITIONS The FMGS is designed to switch automatically from DESCENT to APPROACH phase, on passing the DECEL pseudo-waypoint. It may also be switched manually to APPROACH phase by using ACTIVATE APPROACH function from any PERF pages except TO and APPR.
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HDG/TRK and vertical guidance through V/S-FPA mode, − Managed guidance modes: lateral and vertical guidance are controlled by FMGS through FINAL APP mode, − Managed lateral / Selected vertical guidance modes: lateral guidance is controlled by FMS via NAV mode, vertical guidance is controlled by pilot via V/S-FPA mode.
FLIGHT PHASES GO-AROUND 3 8.1. SWITCHING CONDITIONS The FMGS is designed to switch automatically from APPROACH to GO- AROUND phase when all the following conditions are met: − A/C in flight, − Slats extended, − Thrust levers set to TOGA detent.
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2.2. TMPY F-PLN When any revision is made to the ACTIVE F-PLN, a Temporary Flight Plan (TMPY) is created while FMGS continues to provide guidance on ACTIVE F-PLN references. TMPY F-PLN is displayed in yellow on MCDU and by a dashed yellow line on ND.
MULTIPHASE VERTICAL F-PLN management 19 Vertical Guidance: ALT CSTRs are taken into account by the FMGS for target altitude. Refer to Part II: Climb - Ch 4.3 Constraints management for details. {CLB OR DES} When the FMGC cannot determine THV001 {}...
− N2 > IDLE on both engines, and, CRZ FL ABOVE MAX FL − Both thrust levers have an angle greater than 5°. FMGS is in DONE or PREFLIGHT phase EO CLR prompt is pressed. Caution Pressing EO CLR prompt deactivates EO mode. EO mode cannot be restored.
MULTIPHASE PROCEDURES ENGINE-OUT 8.3. TAKE-OFF During TAKE OFF, FMGS switches to EO mode as soon as engine-out is detected. If engine failure occurs before the EOSID diversion point: FROM THV001 {} In the example diversion point is TOU8. SPD/ALT 1000...
MULTIPHASE PROCEDURES ENGINE-OUT 8.4. CLIMB THR CLB OP CLB If an engine failure 1FD2 occurs when FMGS is in LVR MCT A/THR CLIMB phase, EO mode is activated and: − LVR MCT flashes on FMA, − Both MCDUs switch automatically to the PERF...
MULTIPHASE PROCEDURES ENGINE-OUT 8.5. CRUISE If an engine failure occurs when FMGS is in CRUISE phase, EO ACT MODE UTC DEST mode is activated and: MANAGED 1629 CLR* − LVR MCT flashes on FMA, EO LRC − Both MCDUs switch...
MULTIPHASE ENGINE-OUT 11 8.6. DESCENT/APPROACH If an engine failure occurs SPEED OP DES when FMGS is in 1FD2 DESCENT or APPROACH LVR MCT A/THR phase, the EO mode is activated and: − LVR MCT flashes on FMA, − Both MCDUs switch to the...
MULTIPHASE PROCEDURES ENGINE-OUT 8.7. GO-AROUND If an engine failure occurs when FMGS is in GA TRK AP1+2 GO AROUND phase, the TOGA 1FD2 A/THR EO mode is activated MCDUs switch to the PERF GO AROUND page automatically. Proceed according to OPS procedures for Standard or Obstacle strategy.
[]/[ CONTAM£$ DRT TO-FLX TO TOW /TOCG SHIFT/ UPLINK TO DATA REQ page is --.-/--.- ----/ [ ] displayed as long as the FMGS TEMP/QNH TO LIMIT has not switched to the TAKE RECEIVED ---°/----- TO DATA ---- <TO DATA...
WIND REQUEST The WIND REQUEST function is available on ground or in flight, provided FMGS is not in DESCENT or APPROACH phase. It may be initiated from any WIND page of the ACTIVE or SEC F-PLN or from AOC FUNCTION pages.
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GW/CG [2L] ....Insert --.-/--.- 4.37/FF+FQ RTE RSV/% CRZTEMP/TROPO Insert the actual GW and CG. ---.-/ 5.0 ----°/36090 The FMGS is now able to compute FINAL/TIME ---.-/0030 Fuel predictions. EXTRA/TIME ---.-/---- 55.4/25 USING COST INDEX XX message (white) is displayed on scratchpad.
FMS is active system and an important message (amber ones) has been sent. Press the MCDU MENU key and the line select key adjacent to the FMGC prompt to return to the FMGS pages. AIRBUS A318/319/320/321 J43126AA 00...
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- Less than or equal to 3NM when GPS mode is not active. II W Target speeds computed by the FMGs differ by FMS1/FMS2 SPD TGT DIFF 5KT or more. Pilot entry in a data field exceeds the field FORMAT ERROR width or is of incorrect format or type.
− MCDU prompts, − DATA FORMAT. 2.1. Waypoint abbreviations NAV data base WPTs NAV data base files are encoded and released by Thales based on data from the operator's provider. NAV data base codification must be compliant with the ARINC 424 specification.
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