Aircraft Weighing and Levelling Procedures

Weighing and Levelling

• Three weighing techniques can be used: weighing on jack, weighing on wheels, and weighing on jack and wheels.

Pre-Weighing Preparation

• Defuel tanks by suction and drain to remove remaining fuel.
• Ensure pitch and roll attitude are at 0° during defueling.
• Check remaining fuel quantity in weight and balance manual (one table per aircraft version).

Aircraft Preparation

• Place aircraft in a closed hangar.
• Equip with one clinometer at cargo compartment door between frame 14 and frame 17 to measure aircraft pitch attitude = 0.
• Ensure aircraft configuration meets the following conditions: • Flaps retracted. • Control surfaces and trim in neutral position. • Spoilers retracted. • All doors and exits closed. • Blanking plates, protection, and covers removed. • No object or workstand in contact with aircraft.
• Make a list of missing equipment and ensure: • Hydraulic system is topped up. • Engine oil replenished. • Toilets replenished with water and applicable materials. • Potable water system topped up. • Tire characteristics noted.
• Clean aircraft to remove grease, dirt, or water.
• CAUTION: Do not weigh wet or iced aircraft.

Weighing Methods

Weighing on Jack

• Jacking and load cell point location: • 1 or 2 points on the nose. • 1 point for each wing. • 1 safety stay on tail cone.
• Note: Load cell depends on ATR version.
• Maximum permissible load on each point is given in Job Instruction Card (reference n° 08-12-00).

Weighing on Wheels

• Mechanical scales location: • 1 on the nose. • 2 for the main gears.
• Note: Mechanical scales depend on ATR version.
• Three scales must have pans large enough to contain the landing gear tires.

Weighing on Jack and Wheels

• Mechanical scales and jacking point location: • 1 scale and 1 jack for the nose.

Learn about the different techniques and preparations involved in weighing and levelling an aircraft, including pre-weighing and aircraft preparation steps.