Removal of the Dorsal Fin

TASK 53-45-11-000-001-A
Removal of the Dorsal Fin

WARNING: PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:

THE FLIGHT CONTROLS
THE FLIGHT CONTROL SURFACES
THE LANDING GEAR AND THE RELATED DOORS
COMPONENTS THAT MOVE.

MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.

ZONE: 321

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 6M (20 FT)
No specific	1	CRANE HEIGHT 10 M (33 FT)
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	1	WARNING NOTICE(S)
98A55308440001	1	SLING-UNIVERSAL,TAILPLANE

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
321	DORSAL FIN

C. Referenced Information

REFERENCE	DESIGNATION
Dorsal Fin 321AL.

3. Job Set-up
Subtask 53-45-11-865-050-A

A. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	FLIGHT CONTROLS/ELAC1/NORM/SPLY	15CE1	B11
49VU	FLIGHT CONTROLS/THS/ACTR/MOT2	19CE2	B09
** ON A/C NOT FOR ALL
49VU	FLIGHT CONTROLS/ELAC1/NORM/SPLY	15CE1	B06
49VU	FLIGHT CONTROLS/THS/ACTR/MOT2	19CE2	B04
** ON A/C ALL
105VU	FLIGHT CONTROLS/ELAC2/STBY SPLY	16CE2	A02
105VU	FLT CTL/ELAC1/STBY SPLY	16CE1	A01
121VU	FLIGHT CONTROLS/THS ACTR/MOT3	19CE3	Q17
121VU	FLIGHT CONTROLS/THS ACTR/MOT1	19CE1	Q16
121VU	FLIGHT CONTROLS/ELAC2/NORM/SPLY	15CE2	R20

Subtask 53-45-11-010-050-B

B. Get Access
(1) Put the WARNING NOTICE(S) in position to tell persons not to operate the flight controls.
(2) Put the ACCESS PLATFORM 6M (20 FT) in position at zone 321.
(3) Remove and discard the self-adhesive disc from the lift point (1).
(4) Remove and keep the plastic plug from the lift point (1).
(5) Install the lift lug (2) in the lift point (1) with the eye-end out.
(6) Put the CRANE HEIGHT 10 M (33 FT) in position.
(7) Attach the 98A55308440001 SLING-UNIVERSAL,TAILPLANE to the lift lug (2).

4. Procedure
Subtask 53-45-11-020-050-A

A. Removal of the Dorsal Fin 321AL
(1) Remove the screws (3) from the dorsal fin (4).

NOTE: Identify the length of the screws for the installation procedure.

(2) With the aid of the crane, carefully disengage and lift the dorsal fin (4) from the aircraft.

NOTE: The HF antenna is installed below the dorsal fin.

(3) Lower the dorsal fin (4) on to a satisfactory support.
(4) Disconnect the sling.

[Rev.10 from 2021] 2026.04.01 03:50:00 UTC