Installation of the Bevel Gearbox

TASK 27-54-48-400-001-A
Installation of the Bevel Gearbox

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

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.

ZONE: 573
ZONE: 575
ZONE: 673
ZONE: 675
FIN: 6217CM
FIN: 6267CM

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	WARNING NOTICE(S)
No specific	Torque wrench: range to between 8 and 7 m.N (70.80 and 61.95 lbf.in )
98D27604000000	1	COLLAR-SAFETY, SPOILER
98D27604004000	1	COLLAR SAFETY SPOILER

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.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
573	FIXED STRUCT FROM STA 1800 TO STA 4666
575	AFT OUTBD SE OF WING AND TE FIXED STRUCT
673	FIXED STRUCT FROM STA 1800 TO STA 4666
675	AFT OUTBD SE OF WING AND TE FIXED STRUCT
FOR [6217CM] (FLAP BEVEL GEARBOX)
573CB, 573FB, 575AB
FOR [6267CM] (FLAP BEVEL GEARBOX)
673CB, 673FB, 675AB

D. Referenced Information

REFERENCE	DESIGNATION
TASK 20-28-00-912-802-A	Electrical Bonding - General Maintenance Procedure
TASK 27-50-00-000-003-A	Removal of the Lock-Torque Shaft - Flaps and Slats (98D27504030001)
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 27-54-00-710-001-A	Operational Test of the Flap System
TASK 27-54-45-400-009-A	Installation of the Torque Shaft
TASK 27-60-00-866-002-A	Extension-Retraction of the Spoilers for Maintenance
TASK 12-22-00-00	LUBRICATION - DESCRIPTION AND OPERATION
Bevel Gearbox 6217CM(6267CM)
FOR [6217CM] (FLAP BEVEL GEARBOX)
TASK 57-51-37-000-002-A	Removal of the Access Panels 571AB(671AB), 573AB(673AB), 573BB(673BB), 573CB(673CB), 573EB(673EB)
TASK 57-51-37-000-003-A	Removal of the Access Panel
TASK 57-51-37-000-004-A	Removal of the Access Panels 575AB(675AB), 575BB(675BB), 575CB(675CB), 575DB(675DB), 575EB(675EB), 575FB(675FB), 575GB(675GB), 575HB(675HB)
TASK 57-51-37-400-002-A	Installation of the Access Panels 571AB(671AB), 573AB(673AB), 573BB(673BB), 573CB(673CB), 573EB(673EB)
TASK 57-51-37-400-003-A	Installation of the Access Panel
TASK 57-51-37-400-004-A	Installation of the Access Panels 575AB(675AB), 575BB(675BB), 575CB(675CB), 575DB(675DB), 575EB(675EB), 575FB(675FB), 575GB(675GB), 575HB(675HB)
FOR [6267CM] (FLAP BEVEL GEARBOX)
TASK 57-51-37-000-002-A	Removal of the Access Panels 571AB(671AB), 573AB(673AB), 573BB(673BB), 573CB(673CB), 573EB(673EB)
TASK 57-51-37-000-003-A	Removal of the Access Panel
TASK 57-51-37-000-004-A	Removal of the Access Panels 575AB(675AB), 575BB(675BB), 575CB(675CB), 575DB(675DB), 575EB(675EB), 575FB(675FB), 575GB(675GB), 575HB(675HB)
TASK 57-51-37-400-002-A	Installation of the Access Panels 571AB(671AB), 573AB(673AB), 573BB(673BB), 573CB(673CB), 573EB(673EB)
TASK 57-51-37-400-003-A	Installation of the Access Panel
TASK 57-51-37-400-004-A	Installation of the Access Panels 575AB(675AB), 575BB(675BB), 575CB(675CB), 575DB(675DB), 575EB(675EB), 575FB(675FB), 575GB(675GB), 575HB(675HB)

3. Job Set-up
Subtask 27-54-48-860-052-A

A. Aircraft Maintenance Configuration
(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 in position on the flap/slat control lever.
(3) Make sure that spoiler No. 1 is in the extended maintenance position (Ref. AMM TASK 27-60-00-866-002).
(4) Make sure that the 98D27604000000 COLLAR-SAFETY, SPOILER or 98D27604004000 COLLAR SAFETY SPOILER is in position on the piston rod of the servo-control.
(5) Make sure that the WARNING NOTICE(S) is in position on panel 114VU to tell persons not to operate the flap/slat controls.
(6) Make sure that the ACCESS PLATFORM 3M (10 FT) is in position in zones 573(673) and 575(675).
(7) Make sure that the access panels are removed:
(a) FOR [6217CM] (FLAP BEVEL GEARBOX)
1 573CB (Ref. AMM TASK 57-51-37-000-002)
2 573FB (Ref. AMM TASK 57-51-37-000-003)
3 575AB (Ref. AMM TASK 57-51-37-000-004).
(b) FOR [6267CM] (FLAP BEVEL GEARBOX)
1 673CB (Ref. AMM TASK 57-51-37-000-002)
2 673FB (Ref. AMM TASK 57-51-37-000-003)
3 675AB (Ref. AMM TASK 57-51-37-000-004).

Subtask 27-54-48-865-052-A

B. 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/WTB/FLP/SYS2	12CV	P20
121VU	FLIGHT CONTROLS/FLP/CTL AND/MONG/SYS2	8CV	Q21
122VU	FLIGHT CONTROLS/WTB/FLP/SYS1	10CV	S07

4. Procedure

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 27-54-48-210-050-A

A. Preparation before Installation

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

(1) Clean the parts:
(a) Remove all the sealant from the interface between the bevel gearbox and the structure with a Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(b) Clean the connections that have splines with 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) Prepare the bonding surface of the bevel gearbox (3) and the trailing edge rib (Ref. AMM TASK 20-28-00-912-802).
(4) Install the washers (4) on the bolts (5).
(5) Apply a layer of Polysulfide Sealant-Low Adhesion Brushable - (Material No.06AEA1) on:

The interface between the bevel gearbox and the structure
The shanks of the bolts (5) (but not the bonding bolt).

(6) 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) on the connections that have splines.

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

Subtask 27-54-48-420-052-A

B. Installation of Bevel Gearbox 6217CM(6267CM)
(1) Put the bevel gearbox (3) in position onto the drive shaft (2) and its trailing edge rib.
(2) Install the bolts (5) and their washers (4).
(3) TORQUE the bolts (5) to between 8 and 7 m.N (70.80 and 61.95 lbf.in )

.
(4) Install the torque shaft (1) (Ref. AMM TASK 27-54-45-400-009).
(5) Do the check of the bonding value (Ref. AMM TASK 20-28-00-912-802).
(6) Complete the bonding procedure (final protection) of the bevel gearbox (3) and the related bonding bolts (5) (Ref. AMM TASK 20-28-00-912-802).
(7) Apply a layer of Corrosion Preventive Compound-Heavy Duty Soft Film - (Material No.12ACC1) on the remaining washers (4) and the bolts (5).

Subtask 27-54-48-080-050-A

C. Preparation for Test
(1) Remove the 98D27604000000 COLLAR-SAFETY, SPOILER or 98D27604004000 COLLAR SAFETY SPOILER from the piston rod of the servo-control.
(2) Put the applicable spoiler in the operational position (Ref. AMM TASK 27-60-00-866-002).
(3) Make sure that the 98D27504030001 LOCK-TORQUE SHAFT (FLAPS AND SLATS) WITH CLAMP-PIVOT is removed from the outboard flap drive-shaft (Ref. AMM TASK 27-50-00-000-003).
(4) Make sure that the work area is clean and clear of tools and other items.
(5) Remove the access platform(s).

Subtask 27-54-48-865-053-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 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/WTB/FLP/SYS2	12CV	P20
121VU	FLIGHT CONTROLS/FLP/CTL AND/MONG/SYS2	8CV	Q21
122VU	FLIGHT CONTROLS/WTB/FLP/SYS1	10CV	S07

Subtask 27-54-48-710-050-A

E. Operational Test of the Flap System
(1) Do the operational test of the flap system (Ref. AMM TASK 27-54-00-710-001).

5. Close-up
Subtask 27-54-48-410-050-A

A. Close Access
(1) Put the ACCESS PLATFORM 3M (10 FT) in position in zones 573(673) and 575(675).
(2) Install the applicable access panels:
(a) FOR [6217CM] (FLAP BEVEL GEARBOX)
1 573CB (Ref. AMM TASK 57-51-37-400-002)
2 573FB (Ref. AMM TASK 57-51-37-400-003)
3 575AB (Ref. AMM TASK 57-51-37-400-004).
(b) FOR [6267CM] (FLAP BEVEL GEARBOX)
1 673CB (Ref. AMM TASK 57-51-37-400-002)
2 673FB (Ref. AMM TASK 57-51-37-400-003)
3 675AB (Ref. AMM TASK 57-51-37-400-004).

Subtask 27-54-48-860-051-A

B. Aircraft Maintenance Configuration
(1) Make sure the flaps are fully retracted (Ref. AMM TASK 27-50-00-866-009).

Subtask 27-54-48-942-051-A

C. Removal of Equipment
(1) Remove the WARNING NOTICE(S).
(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] 2026.03.31 23:54:01 UTC