Removal of the Bevel Gearbox

TASK 27-54-48-000-001-A
Removal of the Bevel Gearbox

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.

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	SAFETY BARRIER(S)
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)
98D27604000000	1	COLLAR-SAFETY, SPOILER
98D27604004000	1	COLLAR SAFETY SPOILER
98D27803000000	1	LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION

B. 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

C. Referenced Information

REFERENCE	DESIGNATION
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 27-54-45-000-009-A	Removal of Torque Shaft
TASK 27-60-00-866-002-A	Extension-Retraction of the Spoilers for Maintenance
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)
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)

3. Job Set-up
Subtask 27-54-48-860-050-A

A. 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) Fully extend the flaps (Ref. AMM TASK 27-50-00-866-008).
(2) Install the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION on the flap/slat control lever.
(3) Put the WARNING NOTICE(S) in position on panel 114VU to tell persons not to operate the flap/slat controls.
(4) Put spoiler No. 1 in the extended maintenance position (Ref. AMM TASK 27-60-00-866-002).
(5) Put the 98D27604000000 COLLAR-SAFETY, SPOILER or 98D27604004000 COLLAR SAFETY SPOILER on the piston rod of the servo-control.

Subtask 27-54-48-865-050-A

B. Open, safety and tag 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 27-54-48-941-050-A

C. Safety Precautions
(1) Put the SAFETY BARRIER(S) in position.

Subtask 27-54-48-010-050-A

D. Get Access
(1) Put the ACCESS PLATFORM 3M (10 FT) in position in zones 573(673) and 575(675).
(2) Remove the access panels:
(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).

4. Procedure
Subtask 27-54-48-020-050-A

A. Removal of the Bevel Gearbox
(1) Remove the torque shaft (1) (Ref. AMM TASK 27-54-45-000-009).
(2) Remove the bolts (5) and the washers (4) from the bevel gearbox (3).
(3) Remove the bevel gearbox (3) from the trailing edge rib and the torque shaft (2).

[Rev.10 from 2021] 2026.03.31 23:54:00 UTC