Installation of the Line Gearbox

TASK 27-54-47-400-001-A
Installation of the Line Gearbox

WARNING: MAKE SURE THAT THE FLIGHT CONTROL SAFETY-LOCKS AND THE WARNING NOTICES ARE IN POSITION.

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.

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

CAUTION: BE CAREFUL WHEN YOU DO MAINTENANCE TASKS ON THE WING TRAILING EDGE:

DO NOT CAUSE DAMAGE TO THE ELECTRICAL CABLE RACEWAYS.
DO NOT CAUSE DAMAGE TO THE ELECTRICAL CABLE INSTALLATIONS.
MAKE SURE THAT THE ELECTRICAL CABLES ARE INSTALLED CORRECTLY. INCORRECT INSTALLATION CAN CAUSE DAMAGE.

FIN: 6209CM
FIN: 6259CM

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	SAFETY BARRIER(S)
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 0.8 and 0.7 m.daN (70.80 and 61.95 lbf.in )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.03FDB1)	Mineral Oil base Grease-Anti-Fretting Paste -
(Material No.03GBB1)	Synthetic Oil base Grease-General Purpose Clay Thickened -
(Material No.03GBC1)	Synthetic Oil base Grease-General Purpose Lithium Thickened Low Temp. -
(Material No.06AEA1)	Polysulfide Sealant-Low Adhesion Brushable -
(Material No.06AEB2)	Polysulfide Sealant-Low Adhesion Fillet Structure
(Material No.08BAA9)	Non Aqueous Cleaner-General - -
(Material No.12ACC1)	Corrosion Preventive Compound-Heavy Duty Soft Film -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [6209CM] (FLAP LINE GEARBOX)
573AB
FOR [6259CM] (FLAP LINE GEARBOX)
673AB

D. Referenced Information

REFERENCE	DESIGNATION
TASK 20-28-00-912-802-A	Electrical Bonding - General Maintenance Procedure
TASK 27-50-00-866-008-A	Extension of the Flaps on the Ground
TASK 27-50-00-866-008-A-01	Extension of the Flaps/Slats on the Ground
TASK 27-50-00-866-009-A	Retraction of the Flaps on the Ground
TASK 27-50-00-866-009-A-01	Retraction of the Flaps/Slats on the Ground
TASK 27-54-45-000-005-A	Removal of the Torque Shaft
TASK 27-54-45-400-005-A	Installation of the Torque Shaft
TASK 57-51-37-000-002-A	Removal of the Access Panels 571AB(671AB), 573AB(673AB), 573BB(673BB), 573CB(673CB), 573EB(673EB)
TASK 57-51-37-400-002-A	Installation of the Access Panels 571AB(671AB), 573AB(673AB), 573BB(673BB), 573CB(673CB), 573EB(673EB)
TASK 12-22-00-00	LUBRICATION - DESCRIPTION AND OPERATION
Line Gearbox

3. Job Set-up
Subtask 27-54-47-941-053-A

A. Safety Precautions
(1) Make sure that the SAFETY BARRIER(S) are in position.
(2) Make sure that the WARNING NOTICE(S) is in position to tell persons not to operate the flap controls.

Subtask 27-54-47-860-050-A

B. Aircraft Maintenance Configuration

WARNING: MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROLS SURFACES ARE CLEAR. MOVEMENT OF FLIGHT CONTROLS CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.

(1) Make sure that the flaps are fully extended (Ref. AMM TASK 27-50-00-866-008).
(2) Make sure that the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION is installed on the flap/slat control lever.
(3) Make sure that the applicable access panel is removed (Ref. AMM TASK 57-51-37-000-002):

For the left wing, panel 573AB
For the right wing, panel 673AB.

(4) Make sure that the applicable torque shaft that is outboard of the line gearbox is removed (Ref. AMM TASK 27-54-45-000-005).

Subtask 27-54-47-865-050-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	FLIGHT CONTROLS/FLP/CTL AND MONG/SYS1	6CV	B07
** ON A/C NOT FOR ALL
49VU	FLIGHT CONTROLS/FLP/CTL AND MONG/SYS1	6CV	B02
** ON A/C ALL
121VU	FLIGHT CONTROLS/FLP/CTL AND/MONG/SYS2	8CV	Q21

4. Procedure

CAUTION: BE CAREFUL WHEN YOU DO MAINTENANCE TASKS ON THE WING TRAILING EDGE:

DO NOT CAUSE DAMAGE TO THE ELECTRICAL CABLE RACEWAYS.
DO NOT CAUSE DAMAGE TO THE ELECTRICAL CABLE INSTALLATIONS.
MAKE SURE THAT THE ELECTRICAL CABLES ARE INSTALLED CORRECTLY. INCORRECT INSTALLATION CAN CAUSE DAMAGE.

NOTE: The gearbox is a unit filled with grease and is not a hermetically sealed unit. It is normal for this grease to have some oil separation. The external surfaces of the gearbox may be moist with this separated oil as it is not a sealed unit. However, any separated oil in the unit that touches the grease will be changed back during operation. The oil separation will decrease during in-service operation until the lubricant is in a condition that is stable. This is normal and will not cause damage to the unit.

Subtask 27-54-47-420-052-A

A. Preparation for Installation

CAUTION: DO NOT APPLY MORE THAN ONE TYPE OF LUBRICANT. GREASE AND ASSEMBLY PASTE DO NOT MIX.

(1) Clean the component interface and/or the adjacent area with a Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Make sure that the parts retained from the removed component are clean and in the correct condition.
(4) Apply a thin layer of Synthetic Oil base Grease-General Purpose Clay Thickened - (Material No.03GBB1) or Mineral Oil base Grease-Anti-Fretting Paste - (Material No.03FDB1) or Synthetic Oil base Grease-General Purpose Lithium Thickened Low Temp. - (Material No.03GBC1) to the torque shaft splines.

NOTE: For the lubricant grease specification and lubrication requirements, refer to (Ref. AMM D/O 12-22-00-00).

Subtask 27-54-47-420-051-A

B. Installation of the Line Gearbox 6209CM(6259CM)
(1) Apply a layer of Polysulfide Sealant-Low Adhesion Brushable - (Material No.06AEA1) or Polysulfide Sealant-Low Adhesion Fillet Structure (Material No.06AEB2) to the:

Mating faces of the line gearbox (1), and the support bracket (5), (but not at the mating faces of the bonding bolt)
Shanks of the bolts (7), (but not the bonding bolt).

(2) Install the retaining ring (3) on the input shaft of the line gearbox (1).
(3) Install the line gearbox (1) on the inboard torque shaft (4). Make sure that the splines engage, with the pin holes aligned.
(4) Attach the line gearbox (1) to the support bracket (5) with the washers (6) and the bolts (7).
(5) Electrically bond the applicable bolt (7) (Ref. AMM TASK 20-28-00-912-802):

For the left wing, bond the aft inboard bolt (7)
For the right wing, bond the aft outboard bolt (7).

(6) TORQUE the bolts (7) to between 0.8 and 0.7 m.daN (70.80 and 61.95 lbf.in )

.
(7) Install the pin (2) and safety it with the retaining ring (3).
(8) Apply a layer of Corrosion Preventive Compound-Heavy Duty Soft Film - (Material No.12ACC1) to the remaining bolts (7) and the washers (6).

5. Close-up
Subtask 27-54-47-410-050-A

A. Close Access
(1) Install the applicable torque shaft outboard of the line gearbox (1) (Ref. AMM TASK 27-54-45-400-005):
(a) FOR [6209CM] (FLAP LINE GEARBOX)
install 6210CM
(b) FOR [6259CM] (FLAP LINE GEARBOX)
install 6260CM.
(2) Install the applicable access panel (Ref. AMM TASK 57-51-37-400-002):
(a) FOR [6209CM] (FLAP LINE GEARBOX)
install 573AB
(b) FOR [6259CM] (FLAP LINE GEARBOX)
install 673AB.
(3) Remove the access platform(s).

Subtask 27-54-47-865-052-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	FLIGHT CONTROLS/FLP/CTL AND MONG/SYS1	6CV	B07
** ON A/C NOT FOR ALL
49VU	FLIGHT CONTROLS/FLP/CTL AND MONG/SYS1	6CV	B02
** ON A/C ALL
121VU	FLIGHT CONTROLS/FLP/CTL AND/MONG/SYS2	8CV	Q21

Subtask 27-54-47-860-052-A

C. Aircraft Configuration

WARNING: MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROLS SURFACES ARE CLEAR. MOVEMENT OF FLIGHT CONTROLS CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.

(1) Remove the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION from the flap/slat control lever.
(2) Fully retract the flaps (Ref. AMM TASK 27-50-00-866-009).

Subtask 27-54-47-942-050-A

D. Removal of Equipment
(1) Remove the SAFETY BARRIER(S).
(2) Remove the WARNING NOTICE(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 07:00:23 UTC