A350 General Questions Flashcards
What is the Posible minima for RNP APCH and RNP AR?
250’
Can an RNP APCH have a curved “final approach segment”?
NO
Can an RNP APCH be lower than .3?
NO
How can an RNP AR approach chart be coded?
RNAV (RNP) RWY ????
Or
RNP RWY ?? (AR) cat C/D
What is the reduced obstacle clearance value for an RNP AR?
RNP 2 with no buffer.
What is ABAS
Aircraft Based Augmentation Systems
What is GBAS?
Ground Based Augmentation System
What is SBAS?
Satellite Based Augmentation Systems.
What Position is used by the FMS for RNP AR?
The consolidated position from all 3 ADIRUs
What position information is used to display the Terrain on ND and the TAWS itself?
The ADIRUs consolidated position
What information is used to form the ADIRUs consolidated position?
GNSS Position (MMR)»»GIPIRS Posc»»>ADIRU 1(2 or 3)
Or IRS only Posc
Or. Radio/IRS Posc
In degraded mode ( No GNSS or GIPRS Posc) how is the position information processed?
IRS only Position»>Radio / IRS Posc.»>ADIRU»>to onsite AP+FMS+ND
Now in case of ADIRU failure how is the TAWS position calculated?
It is based on the GNSS alone.
How many and what are the parameters that characterize the GIPIRS position?
Integrity
And
Accuracy
What is in general terms Estimated Position ACCURACY?
Is the uncertainty error between the real position and a possible error.
To consider the RNP position ACCURATE it must be correct…
Correct 95% of the time
What is the center of the position accuracy imaginary circle?
The plane or the estimated position?
The Estimated position, and the plane must be inside this accuracy circle.
When is the RNP accuracy criteria met?
When the the EPU (Estimated Position Uncertainty) is less than 1 RNP.
What happens if the EPU is > 1 RNP value?
The approach CAN NOT be flown
Where do we see the position ACCURACY level in the cockpit?
In the position EPU in the MFD. (EPU=0.02 NM)
What is Position Information Integrity?
Is the level of trust we have that the airplane is within the parameters for 99.999% of the time with 4 or more satelites and .1 mile, taking into account hidden NAV failures.
Where do we see the integrity level in the cockpit?
The NAV PRIMARY
What is the normal miles value of integrity?
Around 0.1 NM
What is the normal error value in mtrs for ACCURACY?
About 20 mtr