Step by Step Guide

A318/319/320/321
Profesional
Step-By-Step Tutorial
Vol
6
06-01- 90
11. Dezember 2018
8.6 MCDU PERF APPR PAGE
MCDU PERF APPR PAGE
NO.
PANEL
ACTION
REMARK
TYP
PART (Name)
PART (No.)
PF (PILOT FLYING)
PM (PILOT MONITORING)
1
MCDU
PERF
APPR
QNH, TEMP, MAG WIND
ENTER DATA
2
MCDU
PERF
APPR
TRANS ALT
ENTER DATA
= 6000
3
MCDU
PERF
APPR
BARO / RADIO
ENTER DATA
= BARO 550
4
MCDU
PERF
APPR
VAPP
ENTER DATA
5
MCDU
PERF
APPR
LDG CONF
CHECK
MCDU PERF APPR page
1.
QNH; TEMP; MAG WIND: Enter data (for arrival airport EGLC) according to expected METAR data 7.3.
But if you use P3D “Fair Weather” then just enter QNH=1013/TEMP=20/and MAG/WIND=270/0.
2.
TRANSITION LEVEL: (TRANS ALT) for EGLC = 6000 feet (because it is different from transition altitude
of departure airport EDDH = 5.000) it has to be entered.
3.
BARO – DA (decision altitude): According to the chart for EGLC it is a CAT1 ILS approach. Do not get
confused by the CAT 3 FMA on the PFD. This FMA only tells you what the airplane is capable of, not
what the airport is offering. You can only fly a CAT 3 approach if both the FMA says CAT3 and the
airport has a CAT3 ILS.
As we are flying an ILS CAT1 landing at EGLC we must enter a Barometric-altimeter DA (decision
altitude). Barometric-altimeter MDA/DA is used for NPA, RNAV as well as ILS CAT1 whereas RADIO-
altimeter DH (decision height) is used for ILS CAT2 and 3 landings. If there is no manual input a
standard BARO value of 200 will automatically be entered by the Copilot. But as the actual BARO-DA
value for our arrival airport EGLC (London City) Runway 27 and ILS approach is according to the
charts = 550 so please enter this value.
The information about the available ILS CAT you can get from the charts. The category certification
entails a lot of things. The most important one for CAT2 and CAT3 is a monitoring of the validity of
the ILS signal and a backup power source. For charts there are a few different formats available but
on every ILS chart you will see the capability of the ILS by looking at the minimums. In LIDO charts it
is even spelled out CAT 1, Cat 2 etc. On Jeppesen/AIP charts you sometimes have an extra ILS CAT2/3
charts besides the ILS CAT 1 chart.
4.
VAPP: It is the final approach speed, will automatically be calculated / inserted by the system and
calculated in the following way: VLS plus 1/3 of the tower headwind component. The value of VAPP
is limited so that it is never less than VLS + 5 or more than VLS +15. As a result, VAPP is increased
above its minimum value for runway headwinds above 15 knots. VAPP correction is not increased
further for headwinds exceeding 45 knots.
For STEEP APPROACH into EGLC it is necessary to add another 3 KTS to the calculated VAPP.
5.
LDG CONF: (Landing Configuration) If no value is entered manually it defaults to FULL. For STEEP
APPROACH = FULL is required.