Removal of the Tee Gearbox

TASK 27-84-42-000-001-A
Removal of the Tee Gearbox

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: 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.

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.

FIN: 6005CM

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

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	1	SCRAPER - NON METALLIC
No specific	AR	WARNING NOTICE(S)
98D27504030001	2	LOCK-TORQUE SHAFT (FLAPS AND SLATS) WITH CLAMP-PIVOT
98D27803000000	1	LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
191BB

C. Referenced Information

REFERENCE	DESIGNATION
TASK 27-00-00-480-002-A	Installation of the Flap/Slat Control-Lever Locking Tool (98D27803000000)
TASK 27-50-00-400-003-A	Installation of the Lock-Torque Shaft - Flaps and Slats (98D27504030001)
TASK 27-80-00-866-005-A	Retracting the Slats on the Ground
TASK 29-00-00-864-001-A	Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action
TASK 53-35-13-000-002-A	Removal of the Quick-Release Access Panels from the Belly Fairing Structure
Tee Gearbox

3. Job Set-up
Subtask 27-84-42-866-050-A

A. Retraction of the Slats
(1) Retract the slats to the 0 degree position (Ref. AMM TASK 27-80-00-866-005).
(2) Install the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION (Ref. AMM TASK 27-00-00-480-002) on the slat/flap control lever.

Subtask 27-84-42-865-050-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	FLIGHT CONTROLS/SLT/CTL AND MONG/SYS1	5CV	B06
** 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
** ON A/C NOT FOR ALL
122VU	AIR COND/PACK TEMP/CTL SYS1/2/115VAC	21HH	W22
122VU	AIR COND/PACK TEMP/CTL SYS1/2/28VDC	23HH	W21
122VU	AIR COND/PACK TEMP CTL SYS2/2/28VDC	24HH	Y21
122VU	AIR COND/PACK TEMP CTL SYS2/2/115VAC	22HH	Y20
** ON A/C NOT FOR ALL
122VU	AIR COND/TEMP CTL SYS 2/CHAN A/115VAC	53HH	W22
122VU	AIR COND/TEMP CTL SYS 2/CHAN A/28VDC	55HH	W21
122VU	AIR COND/TEMP CTL SYS 2/CHAN B/28VDC	56HH	Y21
122VU	AIR COND/TEMP CTL SYS 2/CHAN B/115VAC	54HH	Y20

Subtask 27-84-42-860-050-A

C. Aircraft Maintenance Configuration
(1) Depressurize the Green and Blue hydraulic systems and put them in the maintenance configuration (Ref. AMM TASK 29-00-00-864-001).
(2) Put the WARNING NOTICE(S) in position to tell persons not to pressurize the hydraulic systems.

Subtask 27-84-42-010-050-A

D. Get Access

Tee Gearbox

(1) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position at access panel 191BB.
(2) Remove access panel 191BB (Ref. AMM TASK 53-35-13-000-002).
(3) Disconnect the V-clamp (3).
(4) Disconnect the clamp (1).
(5) Remove the bellows (2), clamp (1) and V-clamp (3).

Subtask 27-84-42-480-051-A

E. Installation of the Torque Shaft Locks
(1) Install the 98D27504030001 LOCK-TORQUE SHAFT (FLAPS AND SLATS) WITH CLAMP-PIVOT to lock the left slat transmission (Ref. AMM TASK 27-50-00-400-003).
(2) Install the 98D27504030001 LOCK-TORQUE SHAFT (FLAPS AND SLATS) WITH CLAMP-PIVOT to lock the right slat transmission (Ref. AMM TASK 27-50-00-400-003).

4. Procedure
Subtask 27-84-42-020-050-A

A. Removal of the Tee Gearbox
(1) Disconnect torque shaft 6004CM (8) as follows:
(a) Remove the unwanted corrosion preventive compound from the bolts (9) and the nuts (10) with the SCRAPER - NON METALLIC.
(b) Remove the nuts (10) and the bolts (9) that connect the torque shaft (8) to the input universal joint (7) of the tee gearbox (12).
(c) Disconnect the torque shaft (8) from the input universal joint (7).
(2) Disconnect torque shaft 6006CM (4) as follows:
(a) Remove the unwanted corrosion preventive compound from the bolts (17) and the nuts (16) with the SCRAPER - NON METALLIC.
(b) Remove the nuts (16) and the bolts (17) that connect the torque shaft (4) to the left input universal-joint (5) of the tee gearbox (12).
(c) Disconnect the torque shaft (4) from the left input universal-joint (5).
(d) Remove the left input universal-joint (5) from the tee gearbox (12).
(3) Remove the tee gearbox (12) as follows:
(a) Remove the unwanted corrosion preventive compound from the bolts (14) with the SCRAPER - NON METALLIC.
(b) Hold the tee gearbox (12) to make sure that it does not fall.
(c) Remove the bolts (14) and the washers (15) that attach the tee gearbox (12) to the support bracket.
(d) Carefully move the tee gearbox (12) away from the input universal joint (13) and remove the tee gearbox (12).
(e) Put the retainer spring (11) temporarily in position on the shaft of the universal joint (7) and remove the pin (6).
(f) Remove the input universal joint (7) from the tee gearbox (12).
(g) Remove the retainer spring (11).

[Rev.10 from 2021] 2026.03.31 23:56:42 UTC