Aircraft Weight and Balance Records | Aircraft Systems

Aircraft Weight and Balance Records

When a technician gets involved with the weight and balance of an aircraft, it almost always involves a calculation of the aircraft’s empty weight and EWCG. Only on rare occasions are technicians involved in calculating adverse-loading CG checks, how much ballast is needed, or the loaded weight and balance of the aircraft. Calculating the empty weight and EWCG might involve putting the aircraft on scales and weighing it, or a pencil and paper exercise after installing a new piece of equipment.

The FAA requires that a current and accurate empty weight and EWCG be known for an aircraft. This information must be included in the weight and balance report, which is a part of the aircraft permanent records. The weight and balance report must be in the aircraft when it is being flown.


There is no required format for this report, but Figure 1 is a good example of recording the data obtained from weighing an aircraft. As it is currently laid out, the form would accommodate either a tricycle gear or tail dragger airplane. Depending on the gear type, either the nose or the tail row would be used. If an airplane is being weighed using jacks and load cells, or if a helicopter is being weighed, the item names must be changed to reflect the weight locations.

Aircraft weight and balance
Figure 1. Center of gravity location on a large commercial transport

If an equipment change is being done on an aircraft, and the new weight and balance is calculated mathematically instead of weighing the aircraft, the same type of form shown in Figure 2 can be used. The only change would be the use of a four-column solution, instead of six columns, and there would be no tare weight or involvement with fuel and oil.

 

Aircraft Weight and Balance Report

Results of Aircraft Weighing

           

Make________________________________   Model________________________________

Serial #______________________________   N#___________________________________

Datum Location_______________________________________________________________

Leveling Means_______________________________________________________________

Scale Arms:             Nose________  Tail________     Left Main________        Right Main_________

Scale Weights:        Nose________  Tail________     Left Main________        Right Main_________

 

Weight and Balance Calculation

Item

Scale (lb)

Tare Wt. (lb)

Net Wt. (lb)

Arm (inches)

Moment (in-lb)

Nose

 

 

 

 

 

Tail

 

 

 

 

 

Left Main

 

 

 

 

 

Right Main

 

 

 

 

 

Subtotal

 

 

 

 

 

Fuel

 

 

 

 

 

Oil

 

 

 

 

 

Misc.

 

 

 

 

 

Total

 

 

 

 

 

 

Aircraft Current Empty Weight:____________________________________________________

Aircraft Current Empty Weight CG: ________________________________________________

Aircraft Maximum Weight: _______________________________________________________

Aircraft Useful Load: ___________________________________________________________

Computed By: ___________________________________________ (print name)

                        ___________________________________________ (signature)

 

Certificate #: _____________________________ (A&P, Repair Station, etc.)

 

Date: ___________________

 



RELATED POSTS
Weight and Balance Terminology
Procedures for Weighing an Aircraft
Loading an Aircraft for Flight
Equipment Change and Aircraft Alteration
Loading Graphs and CG Envelopes