Terminology

Question 1

What is the meaning of the following acronyms?
- ND
- DBI
- SG
- EGPWS

Answer 1

ND - Navigation display
DBI - Dual bearing indicator
SB - Symbol Generator
EGPWS - Enhanced Ground Proximity Warning System

Question 2

What is the meaning of the following acronyms?
- PTU
- ASP
- EFIS

Answer 2

PTU - Power Transfer Unit
ASP - Audio Selector Panel
EFIS - Electronic Flight Instrument System

Question 3

What is the meaning of the following acronyms?
- Mmo
- Vmo
- V1
- MCT
- CDU
- FMC

Answer 3

Mmo - Maximum Mach Number
Vmo - Max operating speed
V1 - Take off decision speed
MCT - Maximum continuous thrust
CDU - Control display unit
FMC - Flight management computer

Question 4

What is the meaning of the following acronyms?
- Vref
- Vapp

• Touch down speed
• Vfto
• Ver

Answer 4

Vref - Cross threshold at this speed. Landing reference speed for aircraft weight and flap setting. (Vref = 1.3 x Vs) can increase by +14kts 146, +19kts RJ for gusts

Vapp - Final approach after landing flap selected. (Vref +5)

Touch down speed - Normally 7kts less than threshold speed (Vref)

Vfto - Final take-off speed at which the take-off flight path is flown following flap retraction. Used on T/O, GA and as a reference to determine some approach speeds

Ver - An En-route Climb Speed. Gives best climb gradient, or best drift down after engine failure. Approx 10kts more than Vfto

Question 5

What is the meaning of the following acronyms?

V2
CDU
TCAS RA

Answer 5

V2 - Take-off safety speed is the minimum initial climb out speed from a height of about 35ft with OEI (up until acceleration altidude). Provides a safe margin above Vs and Vmca

CDU - Control Display Unit

TCAS RA - Traffic Collision Avoidance System - Resolution Advisory