Procedure for the Installation of Wheel Chocks on Aircraft

TASK 10-11-00-555-015-A
Procedure for the Installation of Wheel Chocks on Aircraft

WARNING: OBEY THESE SAFETY PRECAUTIONS DURING MOVEMENT OF THE AIRCRAFT (TOWING, PUSHBACK OR TAXIING). MAKE SURE THAT:

THE PATH OF THE AIRCRAFT IS CLEAR OF PERSONS, EQUIPMENT AND OTHER OBSTACLES.
NO PERSONS GO NEAR THE TOW TRACTOR, TOWBAR, LANDING GEARS, ENGINE NACELLES OR BELOW THE AIRCRAFT FUSELAGE.
ONLY QUALIFIED PERSONS ARE ON THE TRACTOR AND NO PERSONS SIT OR STAND ON THE TOWBAR.
NO PERSONS GO NEAR THE AIRCRAFT BEFORE IT IS FULLY STOPPED.

THERE IS A RISK OF INJURY OR DEATH IF YOU DO NOT OBEY THESE INSTRUCTIONS.

1. Reason for the Job
This task gives general recommendations about the location of wheel chocks for different aircraft conditions.

NOTE: The operator can use these guidelines and his experience and knowledge of the local regulations to make a decision.

2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	CHOCK - WHEEL(S)

B. Referenced Information

REFERENCE	DESIGNATION
Location of Wheel Chocks

3. Job Set-up
Subtask 10-11-00-941-058-A

A. Wheel Chock Specifications
(1) Use CHOCK - WHEEL(S) that agree with SAE AIR4905 standard.

Subtask 10-11-00-941-059-A

B. Safety Precautions
(1) Before you go near the landing gears to install the CHOCK - WHEEL(S), make sure that:

The aircraft is fully stopped
The beacon lights are off
All the engines are stopped.

4. Procedure
Subtask 10-11-00-555-078-A

A. Location of Wheel Chocks

Location of Wheel Chocks

(1) Aircraft in flight-ready condition
(a) Put the CHOCK - WHEEL(S) in front of and behind the outboard wheel of the right and left MLG.
(b) There must be a small distance between the tires and the CHOCK - WHEEL(S).

NOTE: Weight changes can have an effect on the wheelbase, which can cause the tires to catch the chocks.

NOTE: If you put CHOCK - WHEEL(S) at the NLG because of the local regulations, make sure that they do not touch the tires.

(c) If the aircraft is parked on a slope, also put CHOCK - WHEEL(S) on the down-slope side of the inboard wheel of each MLG. Make sure that the down-slope chocks touch the wheels and that the up-slope chocks do not touch the wheels.

NOTE: On slippery surfaces, we recommend to use more CHOCK - WHEEL(S) and to apply the parking brake.

(2) Aircraft in flight-ready condition with wind speed more than 25 Kts
(a) Put the CHOCK - WHEEL(S) behind and in front of the NLG and MLG wheels.
(b) There must be a small distance between the tires and the CHOCK - WHEEL(S).

NOTE: Weight changes can have an effect on the wheelbase, which can cause the tires to catch the chocks.

NOTE: On slippery surfaces, or in strong wind conditions, we recommend to apply the parking brake.

(3) Aircraft in parking or storage condition
(a) Put the CHOCK - WHEEL(S) behind and in front of the NLG and MLG wheels.
(b) There must be a small distance between the tires and the CHOCK - WHEEL(S).

NOTE: Weight changes can have an effect on the wheelbase, which can cause the tires to catch the chocks.

NOTE: On slippery surfaces, or in strong wind conditions, we recommend to apply the parking brake.
The parking brake has sufficient pressure for 12 hours.

[Rev.10 from 2021] 2026.03.31 22:53:18 UTC