Installation of Spoiler 4

TASK 27-64-44-400-001-A
Installation of Spoiler 4

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

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: 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: 580
ZONE: 680

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 2M (6 FT) - ADJUSTABLE
No specific	AR	SAFETY BARRIER(S)
No specific	1	TOMMY BAR DIA 4 MM (0,157 IN) - METALLIC
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 3 and 2.5 m.N (26.55 and 22.12 lbf.in )
No specific	Torque wrench: range to between 40 and 35 m.N (29.50 and 25.81 lbf.ft )
No specific	Torque wrench: range to between 65 and 52 m.N (47.93 and 38.35 lbf.ft )
No specific	Torque wrench: range to between 60 and 55 m.N (44.25 and 40.56 lbf.ft )
98D27603002000	1	KEY-SPOILER MAINTENANCE
OR	OR
98D27603002001	1	KEY-SPOILER MAINTENANCE
98D27604000000	2	COLLAR-SAFETY, SPOILER
98D27604004000	2	COLLAR SAFETY SPOILER
98D27803000000	2	LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.06AEB2)	Polysulfide Sealant-Low Adhesion Fillet Structure
(Material No.06LCB1)	Non Hardening Jointing Putty-Medium Temp. Area Chromate Free -
(Material No.06LCG9)	Non Hardening Jointing Putty-Medium Temp. Area - -
(Material No.08BAA9)	Non Aqueous Cleaner-General - -
(Material No.12ACC1)	Corrosion Preventive Compound-Heavy Duty Soft Film -
(Material No.12ADB1)	Corrosion Preventive Compound-Water Displacing & Heavy Duty Hard Film -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
580	LEFT WING FLAPS AND SPOILERS
680	RIGHT WING FLAPS AND SPOILERS
197CB, 197EB, 198CB, 575EB, 575FB, 675EB, 675FB

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
9	PIN	AIPC 27-64-05-04-020
27	PIN	AIPC 27-64-05-14-100
16	PIN	AIPC 27-64-05-14-180
37	PIN	AIPC 27-64-05-14-300
48	PIN	AIPC 27-64-05-14-300
9	PIN	AIPC 27-64-85-04-010
27	PIN	AIPC 27-64-85-14-110
16	PIN	AIPC 27-64-85-14-180
37	PIN	AIPC 27-64-85-14-280
48	PIN	AIPC 27-64-85-14-280

E. Referenced Information

REFERENCE	DESIGNATION
TASK 20-28-00-912-802-A	Electrical Bonding - General Maintenance Procedure
TASK 20-28-00-912-803-A	Bonding Surface Preparation
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 27-60-00-866-002-A	Extension-Retraction of the Spoilers for Maintenance
TASK 27-64-00-710-001-A	Operational Test of the Spoiler Hydraulic Actuation
TASK 27-64-00-820-001-C	Adjustment of the Spoilers
TASK 27-64-00-820-001-D	Adjustment of the Spoilers
TASK 27-64-00-820-001-E	Adjustment of the Spoilers
TASK 29-00-00-864-001-A	Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action
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 57-51-37-400-004-A	Installation of the Access Panels 575AB(675AB), 575BB(675BB), 575CB(675CB), 575DB(675DB), 575EB(675EB), 575FB(675FB), 575GB(675GB), 575HB(675HB)
SRM 577000
Spoiler 4 - Location and Details ** ON A/C NOT FOR ALL
Spoiler 4 - Location and Details ** ON A/C NOT FOR ALL
Spoiler 4 - Clearances and Seal Adjustment
Servo control of Spoiler 4

3. Job Set-up
Subtask 27-64-44-860-052-A

A. Aircraft Maintenance Configuration
(1) Make sure that the aircraft electrical circuits are energized
(Ref. AMM TASK 24-41-00-861-002).
(2) Make sure that the applicable spoiler (1) servo-control is in the maintenance position (Ref. AMM TASK 27-60-00-866-002).
(3) On the overhead panel, on FLT CTL panel 23VU, make sure that the SEC 1 pushbutton switch is released (the OFF legend is on).
(4) On the overhead panel, on FLT CTL panel 24VU, make sure that the SEC 2 and SEC 3 pushbutton switches are released (the OFF legends are on).
(5) On the center pedestal, make sure that the SPEED BRAKE control lever is set to RET.
(6) Make sure that the hydraulic systems are depressurized and put them in the maintenance configuration
(Ref. AMM TASK 29-00-00-864-001).

Subtask 27-64-44-941-060-A

B. Safety Precautions
(1) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.
(2) In the cockpit:
(a) Make sure that the WARNING NOTICE(S) are in position:

On the overhead panel, on the hydraulic section of panel 40VU, to tell persons not to pressurize the hydraulic systems
On the overhead panel, on FLT CTL panels 23VU and 24VU, to tell persons not to push the SEC pushbutton switches
On the center pedestal, on the SPEED BRAKE control lever, to tell persons not to operate it
On the flight controls, to tell persons not to operate them.

(b) On the center pedestal, on panel 114VU, make sure that the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION is installed on the flap and slat control lever.
(3) On the ground:
(a) Make sure that access doors 197CB, 198CB and 197EB are open.
(b) Make sure that the WARNING NOTICE(S) are in position:

On the ground service panel of the Yellow hydraulic system, to tell persons not to pressurize the Yellow hydraulic system
On the ground service panel of the Green hydraulic system, to tell persons not to pressurize the Green hydraulic system
On the ground service panel of the Blue hydraulic system, to tell persons not to pressurize the Blue hydraulic system.

Subtask 27-64-44-865-051-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/SEC1/NORM/SPLY	21CE1	B08
49VU	FLIGHT CONTROLS/FLP/CTL AND MONG/SYS1	6CV	B07
** ON A/C NOT FOR ALL
49VU	FLIGHT CONTROLS/SEC1/NORM/SPLY	21CE1	B03
49VU	FLIGHT CONTROLS/FLP/CTL AND MONG/SYS1	6CV	B02
** ON A/C ALL
105VU	FLT CTL/SEC1/STBY SPLY	22CE	B01
121VU	FLIGHT CONTROLS/FLP/CTL AND/MONG/SYS2	8CV	Q21
121VU	FLIGHT CONTROLS/SEC3/SPLY	21CE3	Q19
121VU	FLIGHT CONTROLS/SEC2/SPLY	21CE2	Q18

Subtask 27-64-44-010-056-A

D. Get Access
(1) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position below the access panels that follow:

For the left wing, 575EB and 575FB
For the right wing, 675EB and 675FB.

(2) Make sure that the access panels that follow are removed:

For the left wing, panels 575EB and 575FB (Ref. AMM TASK 57-51-37-000-004)
For the right wing, panels 675EB and 675FB (Ref. AMM TASK 57-51-37-000-004).

(3) Make sure that the 98D27604000000 COLLAR-SAFETY, SPOILER or the 98D27604004000 COLLAR SAFETY SPOILER is installed on the servo control.

4. Procedure
Subtask 27-64-44-420-054-C

A. Preparation for the Installation
(1) Clean the component interface and/or the adjacent area with a Textile-Lint free Cotton - (Material No.14SBA1) made moist with the Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(2) Make sure that the parts retained from the removed component are clean and in the correct condition.
(3) Do an inspection of the component interfaces and the adjacent area.
(4) Apply the Non Hardening Jointing Putty-Medium Temp. Area - - (Material No.06LCG9) or Non Hardening Jointing Putty-Medium Temp. Area Chromate Free - (Material No.06LCB1) on the parts that follow:

The hinges on the rear spar
The hinges on the spoiler (1)
The sliding bushes (4), (20), (31), (32) and (43)
The washers (10), (17), (28), (38) and (49)
The flanged bush (6)
The hinge pins (5), (18), (30) and (42)
The spacer (14)
The shaft (15)
The nut (3).

Subtask 27-64-44-916-056-A

B. Application of the Special Materials
(1) Apply a layer of the Corrosion Preventive Compound-Heavy Duty Soft Film - (Material No.12ACC1) on the rod eye end, on the rounded surface only. Do not apply the Corrosion Preventive Compound-Heavy Duty Soft Film - (Material No.12ACC1) on the servo-control spherical bearing.

Subtask 27-64-44-420-050-E ** ON A/C NOT FOR ALL

C. Installation of Spoiler 4

CAUTION: SUPPORT THE SERVO CONTROL 7.5kg (16.5lb) AND THE SPOILER APPROXIMATELY 15kg (33lb). THIS WILL PREVENT DAMAGE TO:

THE HYDRAULIC LINES
THE ELECTRICAL CABLES
THE STRUCTURE.

(1) Prepare the surface of the bonding point(s)
(Ref. AMM TASK 20-28-00-912-803).
(2) Install the spacer (14) on the shaft (15).
(3) Put the spoiler (1) in position on supports.
(4) Install the spoiler (1):
(a) Push the spoiler (1) inboard to engage the spoiler link assembly (13) on the shaft (15).
(b) Push the spoiler (1) forward to:
1 Engage the spoiler link assembly (19) on the rear spar fitting.
2 Engage the spoiler (1) on the rear spar fittings.
(5) Install the sliding bushes (20), (31), (32) and (43) on the rear spar fittings.
(6) Install the hinge pins (18), (30) and (42) through the rear spar fittings and the spoiler fittings.
(7) Make sure that the sliding bushes (20), (31), (32) and (43) are correctly installed in the rear spar fittings.
(8) Install the items that follow:
(a) Install the washer (17) and the nut (12) on the shaft (15).
(b) Install the washer (28) and the nut (21) on the hinge pin (18).
(c) TORQUE the nuts (12) and (21) to between 40 and 35 m.N (29.50 and 25.81 lbf.ft )

.
(d) Install the locking caps (11) and (22) on the nuts (12) and (21).
(e) Install the washers (38) and (49), and the nuts (33) and (44) on the hinge pins (30) and (42).
(f) TORQUE the nuts (33) and (44) to between 60 and 55 m.N (44.25 and 40.56 lbf.ft )

.
(g) Install the locking caps (34) and (45) on the nuts (33) and (44).

WARNING: USE PROTECTIVE GOGGLES WHEN YOU REMOVE OR INSTALL A COTTER PIN. EACH TIME YOU REMOVE A COTTER PIN DURING THE TASK, DISCARD IT IMMEDIATELY. A LOOSE COTTER PIN CAN CUT YOU OR MAKE YOU BLIND.

(9) Safety the locking caps with the new cotter pins as follows:
(10) Connect the spoiler servo control:
(a) Install the flanged bush (6) and the sliding bush (4) on the spoiler fitting.
(b) Lift the spoiler servo control and move it to the correct position until the grease nipple (7) on the rod eye end of the servo control points down.
(c) Install the hinge pin (5) through the flanged bush (6), rod eye end and sliding bush (4):
1 Make sure that the short side of the hinge pin (5) head is adjacent to the projection on the spoiler attachment bracket.
(d) Measure dimension T and make sure that dimension T is a maximum of 0.7 mm (0.0276 in.):
1 If dimension T is more than 0.7 mm (0.0276 in.), refer to the Structural Repair Manual (SRM) for the available repair SRM 577000.
(e) Make sure that the sliding bush (4) and the flanged bush (6) are correctly installed in the spoiler fitting.
(f) Install the items that follow:
1 Install the washer (10) and the nut (3) on the hinge pin (5).
2 TORQUE the nut (3) to between 65 and 52 m.N (47.93 and 38.35 lbf.ft )

.
3 Install the locking cap (2) on the nut (3).

WARNING: USE PROTECTIVE GOGGLES WHEN YOU REMOVE OR INSTALL A COTTER PIN. EACH TIME YOU REMOVE A COTTER PIN DURING THE TASK, DISCARD IT IMMEDIATELY. A LOOSE COTTER PIN CAN CUT YOU OR MAKE YOU BLIND.

(g) Safety the locking cap (2) with the new AIPC 27-64-05-04-020 PIN (9) or the new AIPC 27-64-85-04-010 PIN (9).
(11) Clean the interfaces of the bolt (23) and the spacer (24) with a clean Textile-Lint free Cotton - (Material No.14SBA1) and the Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(12) Install the bolt (23) and the spacer (24).
(13) Install the locking plate (25) and attach it with the nut (26).
(14) TORQUE the nut (26) to between 3 and 2.5 m.N (26.55 and 22.12 lbf.in )

.
(15) Install the locking plates (35) and (46), and attach them with the nuts (36) and (47).
(16) TORQUE the nuts (36) and (47) to between 3 and 2.5 m.N (26.55 and 22.12 lbf.in )

.
(17) Attach the bonding straps (55) to the spoiler (1) with the bolts (53), washers (54) and nuts (56).
(18) Tighten the nuts (56).
(19) Do the electrical resistance measurement and the final protection of the bonding point(s)
(Ref. AMM TASK 20-28-00-912-802).

Subtask 27-64-44-420-050-G ** ON A/C NOT FOR ALL

C. Installation of Spoiler 4

CAUTION: SUPPORT THE SERVO CONTROL 7.5kg (16.5lb) AND THE SPOILER APPROXIMATELY 15kg (33lb). THIS WILL PREVENT DAMAGE TO:

THE HYDRAULIC LINES
THE ELECTRICAL CABLES
THE STRUCTURE.

.
(g) Install the locking caps (34) and (45) on the nuts (33) and (44).

WARNING: USE PROTECTIVE GOGGLES WHEN YOU REMOVE OR INSTALL A COTTER PIN. EACH TIME YOU REMOVE A COTTER PIN DURING THE TASK, DISCARD IT IMMEDIATELY. A LOOSE COTTER PIN CAN CUT YOU OR MAKE YOU BLIND.

.
3 Install the locking cap (2) on the nut (3).

WARNING: USE PROTECTIVE GOGGLES WHEN YOU REMOVE OR INSTALL A COTTER PIN. EACH TIME YOU REMOVE A COTTER PIN DURING THE TASK, DISCARD IT IMMEDIATELY. A LOOSE COTTER PIN CAN CUT YOU OR MAKE YOU BLIND.

(g) Safety the locking cap (2) with the new AIPC 27-64-05-04-020 PIN (9) or the new AIPC 27-64-85-04-010 PIN (9).
(11) Clean the interfaces of the bolts (23), (39) and (50), and the spacers (24), (41) and (52) with a clean Textile-Lint free Cotton - (Material No.14SBA1) and the Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(12) Apply a thin layer of the Polysulfide Sealant-Low Adhesion Fillet Structure (Material No.06AEB2) only on the rear-spar fitting side of the spacers (24), (41) and (52).
(13) Install the bolt (23), washer (29), spacer (24), locking plate (25) and nut (26).
(14) Install the bolt (39), washer (40), spacer (41), locking plate (35) and nut (36).
(15) Install the bolt (50), washer (51), spacer (52), locking plate (46) and nut (47).
(16) TORQUE the nuts (26), (36) and (47) to between 3 and 2.5 m.N (26.55 and 22.12 lbf.in )

Subtask 27-64-44-916-057-A

D. Application of the Special Materials
(1) Apply a layer of the Corrosion Preventive Compound-Water Displacing & Heavy Duty Hard Film - (Material No.12ADB1) on the parts that follow:

The cotter pins (9), (16), (27), (37) and (48)
The locking caps (2), (11), (22), (34) and (45)
The flange of the shaft (15)
The hinge pins (5), (18), (30) and (42).

Subtask 27-64-44-860-057-B

E. Aircraft Maintenance Configuration
(1) Remove the two pins (60) of the 98D27604000000 COLLAR-SAFETY, SPOILER or the 98D27604004000 COLLAR SAFETY SPOILER.
(2) Remove the 98D27604000000 COLLAR-SAFETY, SPOILER or the 98D27604004000 COLLAR SAFETY SPOILER of the servo control.
(3) If there is no plate with the 'O' and 'M' indications on the maintenance device (PRE GOODRICH VSB 31077-27-15):
(a) Make sure that the spoiler is in the fully retracted position.
(b) Put the servo control in the Operation position:

CAUTION: DO NOT APPLY A HIGH TORQUE LOAD ON THE KEY SPOILER MAINTENANCE TOOL WHEN YOU SET THE SERVOCONTROL TO OPERATIONAL MODE OR MAINTENANCE MODE. IF YOU APPLY A HIGH TORQUE LOAD, IT CAN CAUSE DAMAGE TO THE TOOL AND/OR TO THE SERVOCONTROL.

1 Turn the 98D27603002000 KEY-SPOILER MAINTENANCE98D27603002001 KEY-SPOILER MAINTENANCE (61) a quarter turn clockwise and remove it.

NOTE: The necessary torque to operate the maintenance device is 0.350 m.daN (30.97 lbf.in). If 0.350 m.daN (30.97 lbf.in) is not sufficient to turn the KEY-SPOILER MAINTENANCE, it is possible that the maintenance device is damaged. To prevent more damage to the maintenance device, remove the spoiler servo control and send it back to the supplier for analysis.

a If you cannot turn the spoiler maintenance key, use the TOMMY BAR DIA 4 MM (0,157 IN) - METALLIC.
(c) Make sure that the work area is clean and clear of tools and other items.
(d) Make sure that you cannot extend the spoiler:

CAUTION: MAKE SURE THAT NO SPOILER MAINTENANCE KEY STAYS ENGAGED IN THE MAINTENANCE DEVICE HOUSING. AERODYNAMIC FORCES WILL CAUSE UNWANTED MOVEMENT OF THE SPOILER IF THE MAINTENANCE KEY STAYS IN ITS HOUSING.

1 Gradually apply a manual force on the spoiler surface trailing-edge.
(4) If there is a plate with the 'O' and 'M' indications on the maintenance device (POST GOODRICH VSB 31077-27-15):
(a) Make sure that the spoiler is in the fully retracted position.
(b) Put the servo control in the Operation position:

1 Turn the 98D27603002000 KEY-SPOILER MAINTENANCE98D27603002001 KEY-SPOILER MAINTENANCE (61) a quarter turn clockwise to the 'O' position (Operation) and remove it.

CAUTION: MAKE SURE THAT THE STOP OF THE HEXAGONAL-HEAD CONTROL SWITCH IS AGAINST THE LETTER 'O' ON THE HOUSING. IF IT IS AGAINST THE LETTER 'M', AERODYNAMIC FORCES WILL CAUSE UNWANTED MOVEMENT OF THE SPOILER AND POSSIBLE DAMAGE TO EQUIPMENT.

1 Gradually apply a manual force on the spoiler surface trailing-edge.

Subtask 27-64-44-820-051-A

F. Clearance Checks
(1) Make sure that the clearance 'X' is between 16 mm (0.6299 in.) and 20 mm (0.7874 in.).
(2) Make sure that the clearance 'Y' is between 0 mm (0.0000 in.) and 0.50 mm (0.0197 in.). Adjust the seals if it is necessary.
(3) Make sure that:

when there is no step condition, the value of the clearance 'Z' is between 1.63 mm (0.0642 in.) and 2.82 mm (0.1110 in.)
when a step condition exists, the value of the clearance 'Z' is between 0.7 mm (0.0276 in.) and 3.83 mm (0.1508 in.).

The spoiler and the structure must make a continuous surface. The seal must touch the trailing edge structure along its full length.
(4) Adjust the spoiler to give the dimension 'U' between the spoiler and the flap (Ref. AMM TASK 27-64-00-820-001).

Subtask 27-64-44-410-050-A

G. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the access panels that follow:

For the left wing, panels 575EB and 575FB (Ref. AMM TASK 57-51-37-400-004)
For the right wing, panels 675EB and 675FB (Ref. AMM TASK 57-51-37-400-004).

(3) Remove the access platform(s).

Subtask 27-64-44-865-053-A

H. 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/SEC1/NORM/SPLY	21CE1	B08
49VU	FLIGHT CONTROLS/FLP/CTL AND MONG/SYS1	6CV	B07
** ON A/C NOT FOR ALL
49VU	FLIGHT CONTROLS/SEC1/NORM/SPLY	21CE1	B03
49VU	FLIGHT CONTROLS/FLP/CTL AND MONG/SYS1	6CV	B02
** ON A/C ALL
105VU	FLT CTL/SEC1/STBY SPLY	22CE	B01
121VU	FLIGHT CONTROLS/FLP/CTL AND/MONG/SYS2	8CV	Q21
121VU	FLIGHT CONTROLS/SEC3/SPLY	21CE3	Q19
121VU	FLIGHT CONTROLS/SEC2/SPLY	21CE2	Q18

Subtask 27-64-44-710-050-A

I. Operational Test
(1) Do an operational test of the spoiler (Ref. AMM TASK 27-64-00-710-001).

5. Close-up
Subtask 27-64-44-942-051-A

A. Removal of the Equipment
(1) On the ground:
(a) Remove the WARNING NOTICE(S).
(b) Close access doors 197CB, 198CB and 197EB .
(2) In the cockpit:
(a) On the center pedestal, on panel 114VU, make sure that the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION is removed from the flap and slat control lever.
(b) Remove the WARNING NOTICE(S).
(3) If you used safety barriers, remove them.
(4) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

Subtask 27-64-44-860-056-A

B. Aircraft Maintenance Configuration
(1) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
(2) Put the aircraft back to its initial configuration.

[Rev.10 from 2021] 2026.03.31 23:55:46 UTC