Pilot Practices - Mandatory Read

[Eisa Godoussey]

All Pilots,

This forum post is to serve as a notice to all airmen who fly for Arabian Airlines Virtual Aviation. Recently, we have noticed many pilots filing very interesting information regarding their fuel consumption. This has resulted in some PIREP's being denied.

It is important for pilot's to recognize the following parameters:

- Fuel is to be filed in Pounds (LBS).
- For aircraft displaying fuel data in KGS, the conversion is 1KG = 2.2lbs
- Please make the conversion so that you are filing correct fuel data
- When a fuel consumption that is not proportional to aircraft capabilities is filed, the PIREP will be rejected.

We have also witnessed pilots filing fuel consumptions that are very high in comparison to what normal ECON speeds would reflect.

For pilots that use default panels, the following ECON speeds should be used.

A318 to A321:
ECON = MACH 0.78 / max limit = 0.82, min limit = 0.74

A330 to A340:
ECON = MACH 0.83 / max limit = 0.85, min limit = 0.80

B737:
ECON = MACH 0.76 / max limit = 0.80, min limit = 0.73

B747:
ECON = MACH 0.85 / max limit = 0.87, min limit = 0.83

B777:
ECON = MACH 0.82 / max limit = 0.86, min limit = 0.79

EMB170:
ECON = MACH 0.74 / max limit = 0.76, min limit = 0.72

- For all aircrafts, a 5% increase in ground speed should result in a decrease of MACH 0.01
- For all aircrafts, a 5% decrease in ground speed should result in an increase of MACH 0.01
- All decreases and increases shall be made until subsequent MACH limits are hit.

For pilots using advanced panels with cost index figures. Our cost index ranges from 30 to 90. Before flight, your average wind and ground speed needs to be determined.

- If your TAS and GS are rather within 2%, a cost index of 60 shall be used.
- For every 5% of increased ground speed, a 10 unit decrease shall be made to the cost index.
- For every 5% of decreased ground speed, a 10 unit increase shall be made to the cost index.

Example:
TAS = 440
Forecasted GS = 447
Cost Index = 60

Example:
TAS = 440
Forecasted GS = 480
Cost Index = 40

Example:
TAS = 440
Forecasted GS = 390
Cost Index = 36

For this example, extrapolation was used in the following ratio.

  5%      12%
----- = ------
 10ci =   x

x = 24

Cost Index Normal = 60

New Cost Index = 60 - 24

Cost Index = 36


The above notes will promote much more efficient and safer procedures being practiced here at Arabian Airlines Virtual Aviation.



Thanks for reading