Lowering of the Aircraft for Maintenance Operations

TASK 07-11-00-586-002-A
Lowering of the Aircraft for Maintenance Operations

WARNING: WHEN YOU DO THE LEVELING/LIFTING OR LOWERING OF THE AIRCRAFT, MAKE SURE THAT:

YOU USE THE CORRECT LIFTING/LOWERING EQUIPMENT FOR THE CONDITIONS
THE PERSONS WHO OPERATE THE LIFTING/LOWERING EQUIPMENT HAVE THE CORRECT TRAINING AND KNOWLEDGE
THE NECESSARY SAFETY AREA IS IDENTIFIED
THERE ARE NO UNWANTED PERSONS OR EQUIPMENT IN THIS AREA
THERE IS NO WORK IN PROGRESS ON THE AIRCRAFT.

IF YOU DO NOT OBEY THESE PRECAUTIONS, INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT CAN OCCUR.

CAUTION: OBEY THE PROCEDURE THAT FOLLOWS WHEN YOU LOWER THE AIRCRAFT ONTO ITS WHEELS. SUDDEN COMPRESSION OF THE SHOCK ABSORBERS CAN OCCUR AND JACK HEADS CAN CAUSE DAMAGE TO THE WING STRUCTURE.

1. Reason for the Job
To lower the aircraft for maintenance operations.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE
No specific	AR	ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE
No specific	AR	CHOCK - WHEEL(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
311AL

C. Referenced Information

REFERENCE	DESIGNATION
TASK 10-11-00-555-015-A	Procedure for the Installation of Wheel Chocks on Aircraft
TASK 29-10-00-863-002-A	Pressurize the Yellow Hydraulic System with a Hydraulic Ground Power-Cart
TASK 29-10-00-864-002-A	Depressurize the Yellow Hydraulic System
TASK 29-24-00-863-001-A	Pressurize the Yellow Hydraulic System with the Electric Pump
TASK 29-24-00-864-001-A	Depressurize the Yellow Hydraulic System
TASK 32-00-00-481-001-A	Installation of the Safety Devices on the Landing Gears
TASK 32-00-00-860-001-A	Flight Configuration Precautions with Electrical Power
TASK 32-00-00-860-001-A-01	Flight Configuration Precautions without Electrical Power
TASK 32-00-00-860-002-A	Ground Configuration after Flight Configuration with Electrical Power
TASK 32-00-00-860-002-A-01	Ground Configuration after Flight Configuration without Electrical Power
Safety Area ** ON A/C NOT FOR ALL
Safety Area ** ON A/C NOT FOR ALL
Jacking Pads - Installation

3. Job Set-up
Subtask 07-11-00-941-063-A

A. Safety Precautions
(1) Before the lowering operation, identify a safety area.

Safety Area ** ON A/C NOT FOR ALL

NOTE: Local safety regulations can contain additional rules and information applicable to safety areas.

(2) Make sure that there are no persons is in the aircraft.
(3) In the cockpit, make sure that the landing-gear control lever is set to down.
(4) Make sure that the safety devices are installed on the landing gears (Ref. AMM TASK 32-00-00-481-001).
(5) Obey the flight configuration precautions (Ref. AMM TASK 32-00-00-860-001).

Subtask 07-11-00-865-055-A

B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	FWS/FWC1/SPLY	3WW	F01
49VU	COM NAV/ATC/1	5SH1	G11
** ON A/C NOT FOR ALL
121VU	COM NAV/ATC/2	5SH2	K07
** ON A/C ALL
121VU	EIS/FWC2/SPLY	2WW	Q07
122VU	LIGHTING/WING/STROBE	10LV	V05

Subtask 07-11-00-869-062-A

C. On the panel 110VU:

set the parking-brake control switch to OFF.

Subtask 07-11-00-941-064-A

D. Preparation before Lowering
(1) Make sure that the passenger/crew doors, the emergency exits and cargo doors are closed and locked or fully open and locked.
(2) Remove the JACK - SAFETY STAY between FR73 and FR74.

4. Procedure
Subtask 07-11-00-586-051-A

WARNING: WHEN YOU LIFT OR LOWER THE AIRCRAFT, ALWAYS KEEP IT IN A LEVEL ATTITUDE. INJURY TO PERSONS AND/OR DAMAGE TO THE AIRCRAFT CAN OCCUR.

A. Lowering of the aircraft

NOTE: When the aircraft is up on two-piston jacks, to lower it on its wheels, do the steps that follow:

Unlock the back-nut of the small screw and lower the jack down to the stop.
Apply light pressure, unlock the large back-nut and lower the large screw.

(1) Extend the jack rams by 10 mm (0.3937 in.) to release the locknuts.
(2) Loosen the jack locknuts by 100 mm (3.9370 in.).
(3) Operate the controls of the 3 jacks at the same time to lower the aircraft.
(4) Stop before the locknuts touch the jack collar.
(5) Do steps (2) and (3) again until there is a clearance between the wing jack pads and the jacks.
(6) Put the CHOCK - WHEEL(S) in front of the FWD wheels and behind the aft wheels of the MLG (Ref. AMM TASK 10-11-00-555-015).
(7) Fully loosen the locknuts on the wing jacks.
(8) Quickly retract the threaded rods of the wing jacks.
(9) Remove the wing jacks.
(10) Continue to lower the aircraft at the nose jack until there is a clearance between the jack pad and the jack.
(11) Remove the nose jack.

5. Close-up
Subtask 07-11-00-941-065-A

A. Get Access
(1) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position under each wing at RIB9.
(2) Put the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position between FR73 and FR74.

Subtask 07-11-00-080-053-A ** ON A/C NOT FOR ALL

B. Removal of Tools

Jacking Pads - Installation ** ON A/C NOT FOR ALL

(1) Remove the 98D07103000000 DYNAMOMETER-SAFETY STAY.
(2) Remove the 98D07104000000 JACKING PAD SET (2) from RIB9.
(3) Remove the 98D07103500000 JACK ADAPTER-FUSELAGE (1) from FR8.
(4) On the wing, install the plugs into the holes.

Subtask 07-11-00-080-053-B ** ON A/C NOT FOR ALL

B. Removal of Tools

Jacking Pads - Installation ** ON A/C NOT FOR ALL

(1) Remove the 98D07103000000 DYNAMOMETER-SAFETY STAY.
(2) Remove the 98D07104081000 JACKING PAD SET (2) from RIB9.
(3) Remove the 98D07103500000 JACK ADAPTER-FUSELAGE (1) from FR8.
(4) On the wing, install the plugs into the holes.

Subtask 07-11-00-080-053-D ** ON A/C NOT FOR ALL

B. Removal of Tools

Jacking Pads - Installation ** ON A/C NOT FOR ALL

(1) Remove the 98D07103000000 DYNAMOMETER-SAFETY STAY.
(2) Remove the 98D07104000001 JACKING PAD SET (2) from RIB9.
(3) Remove the 98D07103500000 JACK ADAPTER-FUSELAGE (1) from FR8.
(4) On the wing, install the plugs into the holes.

Subtask 07-11-00-860-050-A

C. Aircraft Maintenance Configuration
(1) On panel 110VU:

Set the parking-brake control switch to ON.

(2) On panel 400VU:

Make sure that the pressure indication on the Yellow brake-pressure triple-indicator is correct.
If necessary, pressurize the Yellow hydraulic system:
- With the electric pump (Ref. AMM TASK 29-24-00-863-001) or
- With the ground power supply (Ref. AMM TASK 29-10-00-863-002).

Subtask 07-11-00-865-056-A

D. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	FWS/FWC1/SPLY	3WW	F01
49VU	COM NAV/ATC/1	5SH1	G11
** ON A/C NOT FOR ALL
121VU	COM NAV/ATC/2	5SH2	K07
** ON A/C ALL
121VU	EIS/FWC2/SPLY	2WW	Q07
122VU	LIGHTING/WING/STROBE	10LV	V05

Subtask 07-11-00-860-051-A

E. Aircraft Maintenance Configuration
(1) Put the aircraft in the ground configuration (Ref. AMM TASK 32-00-00-860-002).
(2) Depressurize the Yellow hydraulic system
(Ref. AMM TASK 29-24-00-864-001) or (Ref. AMM TASK 29-10-00-864-002).

Subtask 07-11-00-410-051-A

F. Close Access
(1) Close the access door 311AL.
(2) Remove the access platform(s).
(3) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

[Rev.10 from 2021] 2026.04.01 03:59:02 UTC