weight an balance abc

Basic Empty Weight (BEW)

This weight includes the weight of:

1. Structure + Power plant

2. Fluids (Oil, Unusable fuel, Toilet fluid)

3. Emergency Equipments (Fire extinguisher, Oxygen masks)

4. Extras (Galleys, Electronics, Furnishings)

Unusable Fuel

• Remains after fuel run-out test as per regulations

• Divided into two parts:

  • Drainable: removed by Sump Drains

  • Trapped: Cannot be removed

• Not considered usable for flight operations

Dry Operating weight

Basic Empty Weight plus:

• Flight & cabin crew + baggage

• Manuals & navigation equipment

• Engine oil

• Food, beverages, & service equipment

• Washing & drinking water

• Life rafts & vests

• Cargo handling system

Actual Zero Fuel Weight

Dry Operating Weight + Payload

Must never exceed the maximum zero fuel weight

Maximum Zero Fuel Weight

• Max weight excluding usable fuel

• May include usable fuel if carried instead of payload

Actual Zero Fuel Weight (ZFW)

Dry Operating Weight + Payload

• Must not exceed Maximum Zero Fuel Weight (MZFW)

Maximum Take-Off Weight (TOW)

• Max weight at brake release (takeoff)

• Set by manufacturer

• Structural limit – Must not be exceeded

• excludes taxi/run-up fuel

Maximum Landing Weight (LW)

• Max authorized weight at touchdown (by manufacturer)

• Structural limit – Must not be exceeded

Maximum Taxi Weight

Known as Maximum Ramp Weight

• Max weight allowed on ground (includes taxi & run-up fuel)

• Set by structural limits

Gross Weight

It is the total weight of an airplane
after all items have been added.

Unusable Fuel

Fuel remaining after a Fuel Run-Out Test has been completed and is considered to be in 2 portions

PayLoad

Total weight of Revenue

Useful Load

Consisting of payload

Datum Line

Imaginary Reference Line from which
All weight and balance Calculations & Measurments are taken.

Body Station Number

It is how far in inches a body is from the datum line.