ENRTE & DES Perf

Question 1

Explain OPT FL found at the top of active perf pages.

Answer 1

OPT FL is the FL for which fuel consumption is the lowest.
the computation is based on:
- Gross weight
- CoG
- FMS speed mode (LRC)
- Average wind.

Question 2

Explain REC MAX found at the top of active perf pages

Answer 2

REC MAX is an FMS computed alt based on the ISA delta and current AC gross weight.
It is define by the following conditions:
- AC can reach REC MAX FL with a minimum of 300’/min with MCL
- AC can fly at REC MAX FL between speed of Green Dot & VMO/MMO
- AC can reach REC MAX FL with buffet margin of 0.3g
- AC can maintain REC MAX FL without acceleration with MCT or less
- REC MAX FL never exceeds max certified value (FL

Question 3

The A400 has an aerodrome code ICAO D or FAA Group IV. What is the minimum taxiway required?

Answer 3

15 Metres

Question 4

What destination data is shown at the bottom of the ENRTE & DES perf pages on ground & in flight?

Answer 4

Destination ICA