Aircraft Weighing and Levelling Procedures

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Questions and Answers

What is the primary concern when weighing an aircraft?

Using mechanical scales that depend on the ATR version

Avoiding weight measurement of a wet or iced aircraft (correct)

Ensuring the hydraulic system is topped up

Removing all trace of grease, dirt, or water from the aircraft

What is the minimum number of clinometers required for measuring aircraft pitch attitude?

Three

Four

One (correct)

Two

What is the purpose of replenishing the potable water system?

To top off the hydraulic system

To support the weighing process

To provide water for the toilets (correct)

To clean the aircraft exterior

Where are the load cell points located during weighing on jacks?

On the nose, one on each wing, and one safety stay on the tail cone Signup and view all the answers

What is the primary purpose of defueling the tanks prior to weighing?

To achieve a pitch and roll attitude of 0° Signup and view all the answers

How many mechanical scales are required for weighing on wheels?

Three, with pans large enough to contain the landing gear tires Signup and view all the answers

What is the recommended location for the clinometer in the aircraft?

At the level of the cargo compartment door between frame 14 and frame 17 Signup and view all the answers

What is the correct location for jacking points during weighing on jacks and wheels?

One scale and one jack for the nose, and two scales for the main gears Signup and view all the answers

What is the purpose of checking the remaining fuel quantity in the weight and balance manual?

To determine the aircraft's weight Signup and view all the answers

What is the purpose of noting tire characteristics?

To monitor tire wear and replace them as needed Signup and view all the answers

What is the configuration of the aircraft's control surfaces during weighing and levelling?

Flaps retracted and control surfaces in neutral position Signup and view all the answers

What document provides information on the maximum permissible load on each weighing point?

Job Instruction Card (reference n° 08-12-00) Signup and view all the answers

Why is it essential to clean the aircraft before weighing?

To ensure accurate weight measurement Signup and view all the answers

Why is it essential to remove blanking plates, protection, and covers during aircraft preparation?

To ensure accurate weighing and levelling Signup and view all the answers

What is the primary purpose of weighing the aircraft on jack and wheels?

To verify the aircraft's weight and balance Signup and view all the answers

In which location should the aircraft be placed during weighing and levelling?

In a closed hangar Signup and view all the answers

Study Notes

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.

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Description

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