Removal of the Telescopic Duct

TASK 30-11-41-000-001-A
Removal of the Telescopic Duct

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.

WARNING: MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING GEAR. THIS WILL PREVENT UNWANTED MOVEMENT OF THE LANDING GEAR, AND THUS POSSIBLE INJURY TO PERSONS AND DAMAGE TO THE AIRCRAFT AND/OR EQUIPMENT.

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

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 3M (10 FT)
No specific	AR	CAP - BLANKING
No specific	AR	SAFETY BARRIER(S)
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)
98D27803000000	1	LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.14QFB1)	Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
522EB, 622EB

D. Referenced Information

REFERENCE	DESIGNATION
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 27-80-00-866-004-A	Extending the Slats on the Ground
TASK 49-00-00-860-006-A	APU Shutdown by External Power
TASK 49-00-00-860-006-A-01	APU Shutdown by Batteries
TASK 49-00-00-860-009-A	APU Shutdown by External Power (131-9(A))
TASK 49-00-00-860-009-A-01	APU Shutdown by Batteries (131-9(A))
TASK 57-41-37-000-012-A	Removal of the Access Panel
Telescopic Duct

3. Job Set-up
Subtask 30-11-41-861-050-A

A. Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002) or (Ref. AMM TASK 24-41-00-861-002).

Subtask 30-11-41-941-052-A

B. Safety Precautions
(1) On the flap and slat control lever, on panel 114VU, install the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION.
(2) Put the WARNING NOTICE(S) in positions that follow, before you start the work on the ice protection system:

On the high-pressure ground-power connections, to tell persons not to pressurize the pneumatic system
In the cockpit, to tell persons not to operate the engines or APU control switches
On panel 30VU, to tell persons not to pressurize the bleed-air system
On panel 114VU, to tell persons not to operate the slat controls.

(3) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.

Subtask 30-11-41-866-050-A

C. Extend the Slats
(1) Extend the slats fully (Ref. AMM TASK 27-80-00-866-004).

Subtask 30-11-41-865-050-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	FLIGHT CONTROLS/SLT/CTL AND MONG/SYS1	5CV	B06
** ON A/C ALL
49VU	ANTI ICE/WING/CTL	2DL	C02
49VU	ANTI ICE/WING/MONG	1DL	C01
** ON A/C NOT FOR ALL
49VU	FLIGHT CONTROLS/SLT/CTL AND MONG/SYS1	5CV	B01
** ON A/C ALL
121VU	FLIGHT CONTROLS/SLT/CTL/SYS2	7CV	R21

Subtask 30-11-41-010-050-B

E. Get Access
(1) Put the ACCESS PLATFORM 3M (10 FT) below the applicable zone 522(622).
(2) Remove the applicable access panels:

for the left wing, remove 522EB
for the right wing, remove 622EB (Ref. AMM TASK 57-41-37-000-012).

4. Procedure
Subtask 30-11-41-020-050-B

A. Removal of the Telescopic Duct
(1) If you use the APU to energize the aircraft electrical circuits, stop the APU:

For GTCP 36-300 APU (Ref. AMM D/O 49-00-00-86)
For APS 3200 APU (Ref. AMM TASK 49-00-00-860-006)
For 131-9(A) APU (Ref. AMM TASK 49-00-00-860-009).

WARNING: MAKE SURE THAT THE PNEUMATIC SYSTEM IS DEPRESSURIZED BEFORE YOU START WORK. PRESSURIZED AIR CAN CAUSE INJURY TO PERSONNEL.

(2) Make sure that you wait for a minimum of 5 minutes until there is no pressure in the bleed-air duct system.

WARNING: DO NOT TOUCH THE UNIT UNTIL IT IS SUFFICIENTLY COOL TO PREVENT BURNS WHEN YOU DO THE MAINTENANCE TASK(S).

(3) Make sure that the temperature of the bleed-air duct system is in the ambient condition.
(4) Remove the clamp (3) and manually retract the telescopic duct.
(5) Put the CAP - BLANKING on the open ends of the telescopic duct and the slat duct.
(6) Hold the telescopic duct in the retracted position with 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.
(7) Hold the telescopic duct assembly and remove the clamp (1).
(8) Put blanking caps on the open ends of the telescopic duct and the D-nose duct.
(9) To remove the telescopic duct from the D-nose, do these steps:
(a) Remove and discard the cotter pins (21). Remove the slotted nuts (22) and the washers (23).
(b) Remove the bolts (18) and the washers (19).
(c) Remove the telescopic duct from the D-nose.
(10) If you are to install a new telescopic duct, do these steps:
(a) Release the tab washers (16).
(b) Remove the bolts (17). Remove and discard the tabwashers (16).
(c) Remove the half clamps (14) and (15).
(d) Keep the half clamps (14) and (15) together so you can install them on the replacement duct.

[Rev.10 from 2021] 2026.04.01 00:28:23 UTC