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listen to.
ADIRS - Air Data Inertial Reference System, now replaced by GNADIRS
ADIRU - Air Data Inertial Reference Unit
AMU - Audio Management Unit
ASAP – as in LAND ASAP, As Soon As Possible (this really is listed, I'm not
making this up)
A/SKID - Anti-skid
BSCU - Brakes Steering Control Unit (computer)
BTC - Bus Tie Contactor
CFDS - Centralized Fault Display System
CRC – Continuous Repetitive Chime, used to be called the fire bell.
DDA – Derived Decision Altitude, during RNAV approaches and VOR
approaches the pilot will add 50’ to the original MDA to create a new DDA unless
a note specifying use of VNAV DA(H) is present. This adds a pad to allow room
to go-around from the now stabilized descent instead of the level-off of the MDA.
DDRMI – Digital Distance and Radio Magnetic Indicator (RMI with DME)
DMC - Display Management Computer
DU - Display Unit (CRT, or "TV screen")
US Airways Airbus A319, A320, A321 Notes
107
ECAM - Electronic Centralized Aircraft Monitoring
EIU - Engine Interface Unit
ELAC - Elevator Aileron Computer
EO - Engine Out
E/WD - Engine/Warning Display, upper display for aircraft systems.
FAC - Flight Augmentation Computer
FOM – Flight Ops Manual
FCU - Flight Control Unit (autoflight panel)
FMGC - Flight Management Guidance Envelope Computer, what actually
performs the computations when you type into the MCDU.
FMGS - Flight Management Guidance Envelope System
F-Plan - Flight Plan
FPA - Flight Path Angle
FWC - Flight Warning Computer
FWS - Flight Warning System
GCU - Generator Control Unit
GLC - Generator Line Contactor
GNADIRS – Global Navigation Air Data Inertial Reference System, GPS, Air
Data information and Inertial attitude/guidance all in one.
Green Dot – Best L/D (lift over drag) speed, normally used as the target speed at
end of takeoff or for single engine climb out. Technically called VFTO (Final
Takeoff Speed). On the Airbus a green dot on the airspeed scale.
IDG – Integrated Drive Generator (the old CSD and generator all in one unit)
INIT - Initialization
US Airways Airbus A319, A320, A321 Notes
108
JFA – Just Flying Along, used a lot in ground school as in: “…there you are just
flying along when the demodulator quits causing the blah blah ECAM blah blah
amber FAULT blah blah second channel blah blah and that’s all there is to it.”
L/G - Landing Gear
LGCIU - Landing Gear Control Interface Unit (I think this one is extra credit, we
just called it the linguini)
LSK - Line Select Key (keys used on MCDU screen)
MCDU - Multipurpose Control and Display Unit (this is the actual box used to
enter data into the FMGC, you getting all this?)
MEA- Minimum Enroute Altitude, provides terrain clearance on airway and
normally assures nav signal coverage.
MOCA – Minimum Obstacle Clearance Altitude, provides terrain clearance on
airway, not signal coverage. Denoted by letter “T” after altitude.
MORA – Minimum Off Route Altitude, provides obstacle clearance within 10 nm
of airway centerline. Denoted by letter “a” after altitude.
MMR – Multi Mode Receiver, the GPS receiver for the GNADIRS, two are
installed
MSA – Minimum Safe Altitude, on an approach chart the lowest you can safely
descend if not on a charted route. Normally based on 25 nm from depicted
naviad, can be expanded to 30 if shown. MSA’s provide 1000 ft. of obstacle
clearance but do not ensure signal coverage. May be divided into sectors not
less than 90° each.
ND - Navigation Display (has all those nice little pictures on it to let you know
where you are)
N/W – Nose Wheel
pb – pushbutton
PF – Pilot Flying, the person actually handling the control or autopilot input. Also
the person to blame for the bad landing.
PFD - Primary Flight Display, the display you will look at the most, has airspeed,
altitude, attitude, heading and more. Remember, Blue Up, Brown Down!
PH – Pilots Handbook
US Airways Airbus A319, A320, A321 Notes
109
PM – Pilot Monitoring, the non-flying pilot, used to be called PNF (Pilot Not
Flying). A politically correct way to say this guy is just a professional critic, don’t
blame him for the landing.
PTU – Power Transfer Unit, pump that is able to transfer power (but not fluid)
between the green and yellow hydraulic systems
QRH – Quick Reference Handbook
RAT - Ram Air Turbine, an air driven backup pump for blue hydraulic
RMP - Radio Management Panel, allows pilot to select which radio to tune or
　
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