FCOM: 31 - Indicating & recording Flashcards
Desribe what is shown on the speed scale.
Black/red bar: lowest of VMO, MMO, VLE or VFE.
Green = sign: high speed protection
What is indicated by the yellow arrows? How are these calculated?
VLS is the lowest selectable speed
Vα-prot is the angle of attack at which AoA protection becomes active.
Vα-max is the maximum angle of attack achievable in normal law.
VLS, Vα-prot & Vα-max are computed by the FAC, based on aerodynamic data.
15/06/24
How does the windshear system operate?
Take off: Reactive system is active 3s after lift off to 1300ft.
Predictive system is active when aircraft speed reaches 30kt on take off until 1800ft or 2300ft (depending on serial number).
Alerts are inhibited between 100kt to 50ft.
Approach & landing: Reactive system is active between 1300ft and 50ft.
Predictive system is active below 2300 or 1800ft but alerts inhibited below 50ft.
REACTIVE system generated by FACs and gives a warning when energy falls below a predetermined threshold.
Note: aircraft must be in CONF 1, so in the event of SLAT/FLAP fail, ensure CONF 1 is selected.
PREDICTIVE system is a function of the weather radar
How does the predictive windshear system operate?
The system is active above 30kt, but on take off alerts are inhibited between 100kt and 50ft. On landing, alerts are inhibited below 50ft.
The system scans airspace ahead up to 5nm for windshear.
PWS is active up to 1800ft or 2300ft, depending on MSN.
25/09/24
How does the FPV (bird) get its information?
From IRS data, and suffers from inertial errors.
Also from static pressure information. So if altitude information isn’t available, the bird is not reliable.
The terrain display on ND1 and ND2 gets its information from where?
GPS1>MMR1 and the EGPWS database. This is the same for ND1 and ND2.
Where are advisories on the ECAM shown and how are they displayed?
