Cotter Pin

Customer : HIM Manual : AMM Type : A318/A319/A320/A321 Selected applicability : ALL Rev. Date : Feb 01, 2018 20-11-11-911-802-A - Safetying with a Cotter Pin

** ON A/C ALL TASK 20-11-11-911-802-A Safetying with a Cotter Pin WARNING:

USE PROTECTIVE GOGGLES WHEN YOU REMOVE OR INSTALL A COTTER PIN. EACH TIME YOU REMOVE A COTTER PIN DURING THE TASK, DISCARD IT IMMEDIATELY. A LOOSE COTTER PIN CAN CUT YOU OR MAKE YOU BLIND.

1.

Reason for the Job Self Explanatory

2

Job Set-up Information A.

Referenced Information REFERENCE DESIGNATION (Ref. 20-21-11-911-001-A). Tightening Torques for Standard Threaded Fasteners Location of the Cotter Pin Hole After the Installation of the Nut SHEET 1 Locking with a Cotter Pin - First Procedure (Anchor Procedure) SHEET 1 Locking with a Cotter Pin - Second Procedure (Anchor Procedure) SHEET 1 Locking with a Cotter Pin on Parts that Turn SHEET 1

Print Date: April 02, 2019 © AIRBUS S.A.S. ALL RIGHTS RESERVED. CONFIDENTIAL AND PROPRIETARY DOCUMENT.

Page 1 of 7

Customer : HIM Manual : AMM Type : A318/A319/A320/A321 Selected applicability : ALL Rev. Date : Feb 01, 2018 20-11-11-911-802-A - Safetying with a Cotter Pin

THE COTTER PIN HOLE MUST NOT BE ABOVE THE TOP OF THE NUT

COTTER PIN HOLE

N_MM_201111_2_ABM0_01_02

Figure 20-11-11-991-01200-00-A / SHEET 1/1 - Location of the Cotter Pin Hole After the Installation of the Nut ** ON A/C ALL Print Date: April 02, 2019 © AIRBUS S.A.S. ALL RIGHTS RESERVED. CONFIDENTIAL AND PROPRIETARY DOCUMENT.

Page 2 of 7

Customer : HIM Manual : AMM Type : A318/A319/A320/A321 Selected applicability : ALL Rev. Date : Feb 01, 2018 20-11-11-911-802-A - Safetying with a Cotter Pin

COTTER PIN ENGAGED WITH PROCEDURE 1

CASTELLATED NUT

SLOTTED NUT

TYPICAL COTTER PIN FOLDED AROUND THE NUT

TYPICAL COTTER PIN FOLDED AROUND THE NUT WITH THE END OF THE COTTER PIN IN THE SLOT

N_MM_201111_2_ACM0_01_00

Figure 20-11-11-991-01300-00-A / SHEET 1/1 - Locking with a Cotter Pin - First Procedure (Anchor Procedure) ** ON A/C ALL Print Date: April 02, 2019 © AIRBUS S.A.S. ALL RIGHTS RESERVED. CONFIDENTIAL AND PROPRIETARY DOCUMENT.

Page 3 of 7

Customer : HIM Manual : AMM Type : A318/A319/A320/A321 Selected applicability : ALL Rev. Date : Feb 01, 2018 20-11-11-911-802-A - Safetying with a Cotter Pin

COTTER PIN ENGAGED WITH PROCEDURE 2

CUT THE PRONG OF THE COTTER PIN AT THE HEIGHT OF THE SCREW THREAD CHAMFER

EXAMPLE OF INCORRECT INSTALLATION OF A COTTER PIN FOR LOCKING OF CASTELLATED NUT ON SCREW OR BOLT

THE COTTER PIN PRONG MUST NOT TOUCH THE METAL BASE OR THE WASHER

N_MM_201111_2_ADM0_01_00

Figure 20-11-11-991-01400-00-A / SHEET 1/1 - Locking with a Cotter Pin - Second Procedure (Anchor Procedure) ** ON A/C ALL Print Date: April 02, 2019 © AIRBUS S.A.S. ALL RIGHTS RESERVED. CONFIDENTIAL AND PROPRIETARY DOCUMENT.

Page 4 of 7

Customer : HIM Manual : AMM Type : A318/A319/A320/A321 Selected applicability : ALL Rev. Date : Feb 01, 2018 20-11-11-911-802-A - Safetying with a Cotter Pin

CASTING

AXLE

TYPICAL PROCEDURE TO ENGAGE A COTTER PIN IN A SQUARE-FACED ASSEMBLY. THE ENDS OF THE COTTER PIN ARE BENT FLAT AGAINST THE FACES.

TYPICAL COTTER PIN THROUGH A SHAFT AND A COLLAR

COTTER PIN LENGTH REQUIREMENT

TANGENT TO THE ROD END ROD END 60° MINIMUM COTTER PIN COTTER PIN 60° MINIMUM MAXIMUM LENGTH OF THE COTTER PIN

MINIMUM LENGTH OF THE COTTER PIN

N_MM_201111_2_AEM0_01_00

Figure 20-11-11-991-01500-00-A / SHEET 1/1 - Locking with a Cotter Pin on Parts that Turn ** ON A/C ALL Print Date: April 02, 2019 © AIRBUS S.A.S. ALL RIGHTS RESERVED. CONFIDENTIAL AND PROPRIETARY DOCUMENT.

Page 5 of 7

Customer : HIM Manual : AMM Type : A318/A319/A320/A321 Selected applicability : ALL Rev. Date : Feb 01, 2018 20-11-11-911-802-A - Safetying with a Cotter Pin

3.

Job Set-up Subtask 20-11-11-911-064-A A.

Precautions before the Cotter Pin Installation (1) If you install the cotter pin on a fastener with a thread, make sure that the fastener is tightened to the correct torque value. Refer to: · The related task to install the fastener, or · The standard torque value (Ref. AMM TASK 20-21-11-911-001) . For castellated nuts or slotted nuts, adjust the torque value (between the minimum/ maximum values) to align the castellations or slots. (2) Refer to the related installation task to: · Install the applicable washer below the castellated or the slotted nut if necessary · Install the applicable washer on the pin if necessary · Find the correct IPC reference for the cotter pin. NOTE: The standard Part Number (P/N) of the cotter pin gives its material and dimension. NOTE: Cotter pins installed on parts that turn have a length of approximately two times the pin or rod end diameter. (3) Make sure that the cotter pin hole is not above the top of the castellated or slotted nut. (Ref. Fig. Location of the Cotter Pin Hole After the Installation of the Nut SHEET 1) (4) Make sure that the cotter pin hole and the castellations or slots of the nut are not damaged. (5) Do not make the cotter pin hole or the castellation or the slot on the nut/collar larger to engage the cotter pin. (6) Make sure that the cotter pin is not damaged. NOTE: It is not permitted to use cotter pins more than one time.

4.

Procedure Subtask 20-11-11-911-065-A A.

Cotter-Pin Installation on Parts that do not Turn (1) First procedure for cotter pin installation on castellated or slotted nuts (Anchor procedure) (Ref. Fig. Locking with a Cotter Pin - First Procedure (Anchor Procedure) SHEET 1) (a) Engage the cotter pin through the hole with the plane of its head perpendicular to the bolt/screw axis. (b) Push the cotter pin through the hole until its head touches the nut but does not touch the thread. (c) Bend the prongs of the cotter pin against the sides of the nut with pliers. You can bend the prongs rearward into the adjacent slots of the nut. (d) Cut the unwanted length of prong. (2) Second procedure for cotter pin installation on castellated or slotted nuts (Anchor procedure) (Ref. Fig. Locking with a Cotter Pin - Second Procedure (Anchor Procedure) SHEET 1) (a) Make sure that the bolt/screw is less than one and half threads above the nut. (b) Engage the cotter pin in the hole with the plane of its head parallel to the bolt/screw axis. Do not use too much force to engage the cotter pin. (c) Push the cotter pin in the hole until its head touches the nut but does not touch the thread.

Print Date: April 02, 2019 © AIRBUS S.A.S. ALL RIGHTS RESERVED. CONFIDENTIAL AND PROPRIETARY DOCUMENT.

Page 6 of 7

Customer : HIM Manual : AMM Type : A318/A319/A320/A321 Selected applicability : ALL Rev. Date : Feb 01, 2018 20-11-11-911-802-A - Safetying with a Cotter Pin

(d) Bend the prongs of the cotter pin with pliers: · Put the top prong tightly against the shank of the bolt/screw. · Put the bottom prong tightly against the base of the nut. (e) Cut the unwanted length of prong. The bottom prong must not be above the area of the nut or washer. Subtask 20-11-11-911-066-A B.

Cotter-Pin Installation on Parts that Turn (Ref. Fig. Locking with a Cotter Pin on Parts that Turn SHEET 1) (1) Make sure that the cotter pin length is approximately two times the pin or rod end diameter. (2) Engage the cotter pin in the hole of the rod end (or pin). The plane of the cotter pin head must be perpendicular to the rod (or pin) axis. (3) Push the cotter pin in the hole until its head touches the pin or rod end shank. (4) Bend the prongs of the cotter pin around the pin or rod end shank with pliers. The prongs of the cotter pin must be tightly against the shank. (5) Make sure the prong length is in the limits. If necessary, cut the unwanted length of prong.

Subtask 20-11-11-911-067-A C.

Removal of an Assembled Cotter Pin (1) If necessary, use applicable pliers and/or a wire cutter to remove the assembled cotter pin. Make sure that there is no damage to the bolt/screw threads, nuts or the structure. (2) Remove all the remaining parts of the cotter pin from the aircraft structure and discard them.

5.

Close-up Subtask 20-11-11-942-050-A A.

Make sure that the work area is clean and clear of tools and other items.

End of document

Print Date: April 02, 2019 © AIRBUS S.A.S. ALL RIGHTS RESERVED. CONFIDENTIAL AND PROPRIETARY DOCUMENT.

Page 7 of 7