Removal of the Aileron Servo Control

TASK 27-14-51-000-001-A
Removal of the Aileron Servo Control

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.

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.

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: 33CE1
FIN: 33CE2
FIN: 33CE3
FIN: 33CE4

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 4M (13 FT)
No specific	AR	SAFETY BARRIER(S)
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)
98D27104005000	1	AILERON COLLAR
98L12003001000	1	HARNESS,SAFETY
FOR [33CE1] (SERVO CTL-L AILERON, INBD G)
FOR [33CE2] (SERVO CTL-R AILERON, INBD G)
No specific	AR	CAP - BLANKING
No specific	AR	PLUG - BLANKING
FOR [33CE3] (SERVO CTL-L AILERON, OUTBD B)
FOR [33CE4] (SERVO CTL-R AILERON, OUTBD B)
No specific	AR	CAP - BLANKING
No specific	AR	PLUG - BLANKING

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [33CE1] (SERVO CTL-L AILERON, INBD G)
FOR [33CE3] (SERVO CTL-L AILERON, OUTBD B)
575AT, 575KB, 590AB
FOR [33CE2] (SERVO CTL-R AILERON, INBD G)
FOR [33CE4] (SERVO CTL-R AILERON, OUTBD B)
675AT, 675KB, 690AB

C. Referenced Information

REFERENCE	DESIGNATION
TASK 29-00-00-910-002-A	Safety Procedures of the Hydraulic System
TASK 29-10-00-864-001-A	Depressurize the Green Hydraulic System
TASK 29-10-00-864-003-A	Depressurize the Blue Hydraulic System
TASK 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
TASK 29-23-00-860-001-A	Disconnection of the Isolation Coupling of the Power Transfer Unit (PTU)
TASK 57-51-37-000-005-A	Removal of the Access Panels 575KB(675KB), 575LB(675LB), 575MB(675MB)
TASK 57-51-37-000-007-A	Removal of the Access Panel
TASK 57-51-37-000-011-A	Removal of the Access Panels
Aileron Servo Controls 33CE1(33CE2) - Green Hydraulic System
Aileron Servo Controls 33CE3(33CE4) - Blue Hydraulic System

3. Job Set-up
Subtask 27-14-51-941-050-A

A. Safety Precautions
(1) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.
(2) In the cockpit, put WARNING NOTICE(S) in position to tell persons:
(a) Not to pressurize the Green and Blue hydraulic systems.
(b) Not to operate the flight controls.
(3) Obey the hydraulic safety procedures (Ref. AMM TASK 29-00-00-910-002).

Subtask 27-14-51-860-054-A

B. Aircraft Maintenance Configuration

WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES.

(1) Disconnect the isolation coupling of the Power Transfer Unit (PTU) (Ref. AMM TASK 29-23-00-860-001).
(2) Make sure that the Blue and the Green Hydraulic systems are depressurized (Ref. AMM TASK 29-10-00-864-003), (Ref. AMM TASK 29-10-00-864-001).
(3) Depressurize the applicable reservoirs (Ref. AMM TASK 29-14-00-614-001).

Subtask 27-14-51-865-050-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	FLIGHT CONTROLS/ELAC1/NORM/SPLY	15CE1	B11
** ON A/C NOT FOR ALL
49VU	FLIGHT CONTROLS/ELAC1/NORM/SPLY	15CE1	B06
** ON A/C ALL
105VU	FLIGHT CONTROLS/ELAC2/STBY SPLY	16CE2	A02
105VU	FLT CTL/ELAC1/STBY SPLY	16CE1	A01
121VU	FLIGHT CONTROLS/ELAC2/NORM/SPLY	15CE2	R20

Subtask 27-14-51-010-050-A

D. Get Access
(1) Put on a safety harness:

WARNING: BEFORE YOU START WORK, YOU MUST PUT ON A SAFETY HARNESS AND ATTACH IT TO THE ACCESS PLATFORM. WITHOUT A SAFETY HARNESS, YOU CAN FALL. THIS CAN KILL YOU OR CAUSE YOU INJURY.

(a) Put on and attach a 98L12003001000 HARNESS,SAFETY before you start work in the work area.
(2) Put the ACCESS PLATFORM 4M (13 FT) in position below the applicable zone 575(675).
(3) Remove the applicable access panels (Ref. AMM TASK 57-51-37-000-007), (Ref. AMM TASK 57-51-37-000-005) and (Ref. AMM TASK 57-51-37-000-011):
(a) FOR [33CE1] (SERVO CTL-L AILERON, INBD G), [33CE3] (SERVO CTL-L AILERON, OUTBD B)
remove 575AT 575KB 590AB.
(b) FOR [33CE2] (SERVO CTL-R AILERON, INBD G), [33CE4] (SERVO CTL-R AILERON, OUTBD B)
remove 675AT 675KB 690AB.

4. Procedure
Subtask 27-14-51-020-062-C

A. Removal of the Aileron Servo Control
(1) Manually put and hold the aileron in the fully up position.
(2) Install the 98D27104005000 AILERON COLLAR on the aileron servo control that you do not remove during this procedure.
(3) FOR [33CE1] (SERVO CTL-L AILERON, INBD G), [33CE2] (SERVO CTL-R AILERON, INBD G)
(a) Disconnect the electrical connector (13).
(b) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(c) Remove the lockwire:

WARNING: USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.

1 Remove and discard the lockwire from the bolts (12).
(d) Remove the bolts (12), washers (11) and clamp blocks (9).
(e) At the pipe brackets, near to the inboard and outboard sides of the aileron servo control (25):
1 Remove the nuts (32), bolts (28) and washers (29).
2 Disassemble and remove the tubes (30) and the clamp blocks (31).
(f) Disconnect and remove the return pipe (14) and the pressure pipe (24).
(g) Put a PLUG - BLANKING or a CAP - BLANKING on the hydraulic connections and the disconnected line ends.
(h) At the aileron jack bracket:
1 Remove the nut (3), washer (2) and bolt (1).
2 Remove the locking plate (26).
(i) At the rear-spar jack bracket:
1 Remove the nut (19), washer (20) and bolt (21).
2 Remove the locking plate (22).
(j) Remove and discard the cotter pins (4) and (15) from the locking caps (5) and (16).
(k) Remove the locking caps (5) and (16), nuts (6) and (17) and washers (7) and (18).
(4) FOR [33CE3] (SERVO CTL-L AILERON, OUTBD B), [33CE4] (SERVO CTL-R AILERON, OUTBD B)
(a) Disconnect the electrical connector (53).
(b) Put the CAP-BLANKING on each disconnected electrical connector and receptacle.
(c) Remove the lockwire:

1 Remove and discard the lockwire from the bolts (52).
(d) Remove the bolts (52), washers (51) and clamp blocks (49).
(e) At the pipe brackets, near to the inboard and outboard sides of the aileron servo control (64):
1 Remove the nuts (70), bolts (67) and washers (68).
2 Disassemble and remove the clamp blocks (69).
(f) Disconnect and remove the return pipe (54) and the pressure pipe (63).
(g) Put a PLUG - BLANKING or a CAP - BLANKING on the hydraulic connections and the disconnected line ends.
(h) At the aileron jack bracket:
1 Remove the nut (43), washer (42) and bolt (41).
2 Remove the locking plate (65).
(i) At the rear-spar jack bracket:
1 Remove the nut (60).
2 Remove the locking plate (61) from the stud (59).
(j) Remove and discard the cotter pins (44) and (55) from the locking caps (45) and (56).
(k) Remove the locking caps (45) and (56), nuts (46) and (57) and washers (47) and (58).

Subtask 27-14-51-020-050-B

B. Complete the Removal of the Aileron Servo Control

NOTE: The weight of the aileron servo control is 7.4 kg (16.3 lb).

(1) To decrease the length of the piston rod, remove the 98D27104005000 AILERON COLLAR from the aileron servo control that you do not remove during this procedure.
(2) Manually move the aileron to the down position.
(3) FOR [33CE1] (SERVO CTL-L AILERON, INBD G), [33CE2] (SERVO CTL-R AILERON, INBD G)
(a) Hold the aileron servo control (25) and remove the pin (27).
(b) Manually move the aileron to the fully up position.
(c) Install the 98D27104005000 AILERON COLLAR on the aileron servo control that is not removed.
(d) Remove the pin (23).
(e) Remove the aileron servo control (25) from the aircraft.
(f) Remove the flanged bush (8) from each aileron jack bracket.
(g) Remove the flanged bush (10) from each rear-spar jack bracket.
(h) Do not remove the structural bush (33) from:

The aileron jack bracket
The rear-spar jack bracket.

(i) Install these parts on the removed aileron servo control (25):

The clamp blocks (9)
The washers (11)
The bolts (12).

NOTE: The clamp blocks (9), washers (11) and bolts (12) must stay with the removed aileron servo control (25).

(4) FOR [33CE3] (SERVO CTL-L AILERON, OUTBD B), [33CE4] (SERVO CTL-R AILERON, OUTBD B)
(a) Hold the aileron servo control (64) and remove the pin (66).
(b) Manually move the aileron to the fully up position.
(c) Install the 98D27104005000 AILERON COLLAR on the aileron servo control that is not removed.
(d) Remove the pin (62).
(e) Remove the aileron servo control (64) from the aircraft.
(f) Remove the flanged bush (48) from each aileron jack bracket.
(g) Remove the flanged bush (50) from each rear-spar jack bracket.
(h) Do not remove the structural bush (71) from:

The aileron jack bracket
The rear-spar jack bracket.

(i) Install these parts on the removed aileron servo control (64):

The clamp blocks (49)
The washers (51)
The bolts (52).

NOTE: The clamp blocks (49), washers (51) and bolts (52) must stay with the removed aileron servo control (64).

[Rev.10 from 2021] 2026.03.31 23:47:31 UTC