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4. C. (1) (f) Descent Calculations
During descent the following parameters are calculated and/or
displayed for the active descent mode:
. Bottom-Of-Descent (BOD) altitude
. ETE and ETA to BOD altitude
● Command speed
. DTG to BOD altitude
. Command EPR setting*
* The descent EPR value is removed when flaps or landing
gear are extended.
(g)
Landing Calculations
With this information and that already in the computer,
calculations are made for the landing and go-around parameters.
The following landing parameters are calculated and displayed:
. Landing weight
. Landing distance (non-UKCAA -
. Landing configuration approach
(non-UK CAA)
. Target threshold speeds - VatO
“dry”, UK CAA - “wet”)
speed, Vref = 1.3 V stall
and Vatl (UK CAA only)
s Maximum threshold speeds - all-engine and single-engine (UK
CAA only)
. Dry runway landing field length (non-UK CAA)
. Wet runway landing field length (non-UK CAA)
Data are computed for weights greater than the certified
maximum landing gross weight, but these data are accompanied
with a message denoting exceeding the maximum landing gross
weight and the most restrictive applicable condition.
The
restrictive conditions applicable may include: takeoff-climb-
limited, approach-climb-limited,landing-climb-limited, field-
length-limited, or certified maximum gross weight exceeded.
22-14-00
Page 298.169
Aug 15/91
lJse
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