Installation of the Slat Tracks 1 thru 4

TASK 27-84-61-400-004-A
Installation of the Slat Tracks 1 thru 4

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

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: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

CAUTION: THIS PART IS A REMOVABLE STRUCTURAL COMPONENT (RSC), WHICH CAN BE MOVED BETWEEN AIRCRAFT. THUS IT CAN HAVE DIFFERENT OPERATION CONDITIONS AND A DIFFERENT LIFE RECORD (FLIGHT HOURS/FLIGHT CYCLES/CALENDAR) FROM THE AIRCRAFT IT IS INSTALLED ON OR REMOVED FROM. THE OPERATOR IS RESPONSIBLE FOR THE SPECIFIC TRACKING AND CONTINUED AIRWORTHINESS OF REMOVABLE STRUCTURAL COMPONENTS. INCORRECT MAINTENANCE OF THESE COMPONENTS CAN CAUSE A RISK FOR THE FLIGHT SAFETY.

ZONE: 510
ZONE: 610

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	GAGE - SPRING
No specific	AR	SAFETY BARRIER(S)
No specific	AR	WARNING NOTICE(S)
98D27804014000	1	TOOL-BACKSTOP SLAT (TRACKS 1, 2, 3, AND 4)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.03GBD1)	Synthetic Oil base Grease-General Purpose Lithium Thickened -
(Material No.03HBD9)	Synthetic Ester base Grease-General Purpose Low Temp -
(Material No.06AEA1)	Polysulfide Sealant-Low Adhesion Brushable -
(Material No.06AEB2)	Polysulfide Sealant-Low Adhesion Fillet Structure
(Material No.08BAA9)	Non Aqueous Cleaner-General - -
(Material No.12ABC1)	Corrosion Preventive Compound_Water Displacing Soft Film -
(Material No.12ACC1)	Corrosion Preventive Compound-Heavy Duty Soft Film -
(Material No.14QFB1)	Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
510	LEFT WING SLATS
610	RIGHT WING SLATS
521AB, 521BB, 521CB, 521EB, 621AB, 621BB, 621CB, 621EB

D. Referenced Information

REFERENCE	DESIGNATION
TASK 20-28-00-869-002-A	Table of the Maximum Permitted Resistance-Values
TASK 20-28-00-912-802-A	Electrical Bonding - General Maintenance Procedure
TASK 27-84-48-000-001-A	Removal of the Type A Actuators
TASK 27-84-48-400-001-A	Installation of the Type A Actuators
TASK 27-84-63-000-001-A	Removal of the No. 1 Slat
TASK 27-84-69-000-001-A	Removal of the Closing Plates for the Slat Tracks 1 thru 12
TASK 27-84-69-400-001-A	Installation of the Closing Plates for the Slat Tracks 1 thru 12
TASK 32-00-00-481-001-A	Installation of the Safety Devices on the Landing Gears
TASK 57-41-37-000-004-A	Removal of the Pressure Relief Panels
TASK 57-41-37-000-005-A	Removal of the NACA Duct Panel
TASK 57-41-37-400-002-A	Installation of the Pressure Relief Panels
TASK 57-41-37-400-005-A	Installation of the NACA Duct Panel
Slat-Track Clearances
Side Roller and Vertical Roller - Location and Detail ** ON A/C NOT FOR ALL
Side Roller and Vertical Roller - Location and Detail ** ON A/C NOT FOR ALL
No. 1 Slat - Location and Detail
Slat-Track End-Stop - Location and Detail ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 27-84-61-941-058-A

A. Safety Precautions
(1) Make sure that the SAFETY BARRIER(S) are in position.
(2) Make sure that the ground safety locks are installed on the landing gear (Ref. AMM TASK 32-00-00-481-001).
(3) Make sure that the WARNING NOTICE(S) is in position to tell persons not to operate the slat controls.

Subtask 27-84-61-860-054-A

B. Aircraft Maintenance Configuration
(1) Make sure that the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION is installed on the flap/slat control lever.
(2) Make sure that the applicable closing plates have been removed (Ref. AMM TASK 27-84-69-000-001).
(3) Make sure that the Slat 1 has been removed (Ref. AMM TASK 27-84-63-000-001).
(4) Make sure that the applicable access panels are removed:

for the left wing, 521AB 521BB 521CB 521EB
for the right wing, 621AB 621BB 621CB 621EB

(Ref. AMM TASK 57-41-37-000-004) and (Ref. AMM TASK 57-41-37-000-005).
(5) For the tracks 2 and 3, make sure that the applicable actuator has been removed (Ref. AMM TASK 27-84-48-000-001).

Subtask 27-84-61-865-063-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/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/WTB/SLT/SYS2	11CV	P19
121VU	FLIGHT CONTROLS/SLT/CTL/SYS2	7CV	R21
122VU	FLIGHT CONTROLS/WTB/SLT/SYS1	9CV	S06

4. Procedure
Subtask 27-84-61-280-051-A

A. Pre Installation Checks

NOTE: When slat tracks 1 and 4 are made it can be necessary to install spacers in the main channel. This is to get the correct tolerance. The number of spacers installed in a track can be between zero and four.

(1) Do a check that the applicable pinion(s) can be turned freely by hand.
(2) For track 1, prepare the track for electrical bonding (Ref. AMM TASK 20-28-00-912-802).

Subtask 27-84-61-420-063-A

B. Preparation for Installation
(1) Clean the component interface and/or the adjacent area with a Textile-Lint free Cotton - (Material No.14SBA1) made moist with 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.

Subtask 27-84-61-420-067-C

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.

C. Installation of the Slat Tracks 1 thru 4

No. 1 Slat - Location and Detail

Side Roller and Vertical Roller - Location and Detail ** ON A/C NOT FOR ALL

Slat-Track Clearances

(1) Put the 98D27804014000 TOOL-BACKSTOP SLAT (TRACKS 1, 2, 3, AND 4) (2) through the guide (3) on the applicable track (1):

on the LH wing, install the TOOL-BACKSTOP SLAT (2) on the inboard side of the track
on the RH wing, install the TOOL-BACKSTOP SLAT (2) on the outboard side of the track.

(2) Push and hold the rear stop (4) away from its locked position. Install the track (1) into its correct location.
(3) Release the rear stop (4) and make sure that it is correctly engaged in its locked position.
(4) Remove the 98D27804014000 TOOL-BACKSTOP SLAT (TRACKS 1, 2, 3, AND 4) (2) from the track (1).
(5) For track 1, do the electrical bonding test (Ref. AMM TASK 20-28-00-869-002).
(6) Do a check of the position of the side-rollers at the track:
(a) Move the applicable track (1) through its full range of travel and make sure that:

for tracks 1, 2 and 3, the side-rollers (25) touch the track (1) at some point of its travel
the points that touch do not stop the smooth travel of the track (1)
for track 4, the forward side-rollers (25) have a clearance (DIM. X) of between 1.25 mm (0.0492 in.) and 1.45 mm (0.0571 in.) at their nearest point to the track (1).

(7) If necessary, adjust the non-datum side-rollers (25):

NOTE: The non-datum side-rollers are those installed on the:

outboard rib for the left wing
inboard rib for the right wing.

(a) Remove and discard the lockwire from the bolts (26).
(b) Remove the bolts (26), the side-roller(s) (25) and the shims (27).
(c) Adjust the thickness of the shims (27):

to reduce the friction, increase the thickness of the shims (27) as necessary
to make the side-rollers (25) touch the track (1) at some point of its travel, decrease the thickness of the shims (27) as necessary.

(d) On the track 1, prepare the side-rollers (25) for electrical bonding (Ref. AMM TASK 20-28-00-912-802).
(e) On the tracks 2, 3 and 4, apply a thin layer of Synthetic Oil base Grease-General Purpose Lithium Thickened - (Material No.03GBD1) or Synthetic Ester base Grease-General Purpose Low Temp - (Material No.03HBD9) to the side-rollers (25) and the shims (27).
(f) Apply a layer of Polysulfide Sealant-Low Adhesion Brushable - (Material No.06AEA1) or Polysulfide Sealant-Low Adhesion Fillet Structure (Material No.06AEB2) to the shanks of the bolts (26).
(g) Put the shims (27) and the side-rollers (25) in position and install them with the bolts (26).
(h) Do the procedure again, as necessary, until the adjustment of the side-roller(s) (25) is correct.
(8) Safety the bolts (26) with 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.
(9) Apply a layer of Corrosion Preventive Compound-Heavy Duty Soft Film - (Material No.12ACC1) to the bolts (26) and the shims (27).

Subtask 27-84-61-220-105-B ** ON A/C NOT FOR ALL

D. Positional Check of the Top, Forward Vertical-Roller at the Track
(1) Move the applicable track (1) through its full range of travel and make sure that:

the smooth travel of the track (1) is not stopped by points that touch between the track (1) and the vertical roller (32)
the DIM. Z between the track (1) and the top, forward, vertical-roller (32) is not more than 0.20 mm (0.0079 in.).

Subtask 27-84-61-220-105-C ** ON A/C NOT FOR ALL

D. Positional Check of the Top, Forward Vertical-Roller at the Track
(1) Move the applicable track (1) through its full range of travel and make sure that:

the smooth travel of the track (1) is not stopped by points that touch between the track (1) and the vertical roller (32)
the DIM. Z between the track (1) and the top, forward, vertical-roller (32) is not more than 0.25 mm (0.0098 in.).

Subtask 27-84-61-820-067-D ** ON A/C NOT FOR ALL

E. Adjustment of the Top, Forward Vertical-Roller

Side Roller and Vertical Roller - Location and Detail ** ON A/C NOT FOR ALL

Slat-Track Clearances ** ON A/C NOT FOR ALL

(1) Remove and discard the lockwire from the bolts (28).
(2) Remove the bolts (28), the locking ring (29) and the locking plate (30).
(3) If necessary, adjust the top, forward, vertical-roller (32).
(a) Turn the eccentric bush (31) until the top, forward, vertical-roller (32) touches the track (1).
(b) Move the track (1) through its full range of travel. Stop the track (1) at the point of maximum load between the track (1) and the top, forward, vertical-roller (32).
(c) Turn the eccentric bush (31) to get a clearance of less than 0.04 mm (0.0016 in.).
(d) Move the track (1) through its full range of travel and make sure that the maximum clearance between the track (1) and the top, forward, vertical-roller (32) is not more than 0.20 mm (0.0079 in.).
(e) Do the procedure again, as necessary, until the adjustment of the top, forward, vertical-roller (32) is correct.

Subtask 27-84-61-820-067-E ** ON A/C NOT FOR ALL

E. Adjustment of the Top, Forward Vertical-Roller

Side Roller and Vertical Roller - Location and Detail ** ON A/C NOT FOR ALL

Slat-Track Clearances ** ON A/C NOT FOR ALL

(1) Remove and discard the lockwire from the bolts (28).
(2) Remove the bolts (28), the locking ring (29) and the locking plate (30).
(3) If necessary, adjust the top, forward, vertical-roller (32).
(a) Turn the eccentric bush (31) until the top, forward, vertical-roller (32) touches the track (1).
(b) Move the track (1) through its full range of travel. Stop the track (1) at the point of maximum load between the track (1) and the top, forward, vertical-roller (32).
(c) Turn the eccentric bush (31) to get a clearance of less than 0.04 mm (0.0016 in.).
(d) Move the track (1) through its full range of travel and make sure that the maximum clearance between the track (1) and the top, forward, vertical-roller (32) is not more than 0.25 mm (0.0098 in.).
(e) Do the procedure again, as necessary, until the adjustment of the top, forward, vertical-roller (32) is correct.

Subtask 27-84-61-820-067-F ** ON A/C NOT FOR ALL

E. Adjustment of the Top, Forward Vertical-Roller

Side Roller and Vertical Roller - Location and Detail ** ON A/C NOT FOR ALL

Slat-Track Clearances ** ON A/C NOT FOR ALL

(1) Remove and discard the lockwire from the bolts (28).
(2) Remove the bolts (28), the locking ring (29) and the locking plate (30).
(3) If necessary, adjust the top, forward, vertical-roller (32).
(a) Turn the eccentric bush (31) until the top, forward, vertical-roller (32) touches the track (1).
(b) Move the track (1) through its full range of travel. Stop the track (1) at the point of maximum load between the track (1) and the top, forward, vertical-roller (32).
(c) Turn the eccentric bush (31) to get a clearance of less than 0.04 mm (0.0016 in.).
(d) Move the track (1) through its full range of travel and make sure that the maximum clearance between the track (1) and the top, forward, vertical-roller (32) is not more than 0.25 mm (0.0098 in.).
(e) Do the procedure again, as necessary, until the adjustment of the top, forward, vertical-roller (32) is correct.

Subtask 27-84-61-420-064-D

F. Continuation of the Installation Procedure

(1) Apply a layer of Polysulfide Sealant-Low Adhesion Brushable - (Material No.06AEA1) or Polysulfide Sealant-Low Adhesion Fillet Structure (Material No.06AEB2) to the shank of the bolt (28).
(2) Install the locking plate (30) and the locking ring (29) with the bolt (28).
(3) Safety the bolt (28) with 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.
(4) Apply a layer of Corrosion Preventive Compound-Heavy Duty Soft Film - (Material No.12ACC1) to the bolt (28), the locking ring (29) and the locking plate (30).

Subtask 27-84-61-220-104-D ** ON A/C NOT FOR ALL

G. Friction Check of the Position of the Top, Aft Vertical-Roller at the Track

Side Roller and Vertical Roller - Location and Detail ** ON A/C NOT FOR ALL

Slat-Track Clearances ** ON A/C NOT FOR ALL

(1) Attach a GAGE - SPRING to the applicable track (1).

NOTE: During this check keep the spring gage in the line-of-travel of the track (1).

(2) Use the spring gage to move the track (1) from its fully extended position to the fully retracted position. Monitor the spring gage and make a record of the maximum value shown.
(3) Use the spring gage to extend the track (1) to its fully extended position:

if the spring gage pulls the track (1), make a record of the maximum value shown
if the track (1) extends by its weight and the spring gage holds it back, make a record of the minimum value shown.

(4) Calculate the friction load as follows:

for two maximum values, the friction load is the sum of the two values
for one maximum value and one minimum value, the friction load is the difference of the two values.

(5) With the track (1) held against the two, top, vertical-rollers (32), move the track (1) through its full range of travel. Make sure that where the bottom, aft, vertical-roller (32) and the track (1) do not touch, the clearance (DIM. Y) is not more than 0.20 mm (0.0079 in.).
(6) Adjust the top, aft, vertical-roller (32), if:

the friction load is more than 6.5 daN (14.6126 lbf) and/or
the clearance is more than 0.20 mm (0.0079 in.).

Subtask 27-84-61-220-104-E ** ON A/C NOT FOR ALL

G. Friction Check of the Position of the Top, Aft Vertical-Roller at the Track

Side Roller and Vertical Roller - Location and Detail ** ON A/C NOT FOR ALL

Slat-Track Clearances ** ON A/C NOT FOR ALL

(1) Attach a GAGE - SPRING to the applicable track (1).

NOTE: During this check keep the spring gage in the line-of-travel of the track (1).

if the spring gage pulls the track (1), make a record of the maximum value shown
if the track (1) extends by its weight and the spring gage holds it back, make a record of the minimum value shown.

(4) Calculate the friction load as follows:

for two maximum values, the friction load is the sum of the two values
for one maximum value and one minimum value, the friction load is the difference of the two values.

(5) With the track (1) held against the two, top, vertical-rollers (32), move the track (1) through its full range of travel. Make sure that where the bottom, aft, vertical-roller (32) and the track (1) do not touch, the clearance (DIM. Y) is not more than 0.25 mm (0.0098 in.).
(6) Adjust the top, aft, vertical-roller (32), if:

the friction load is more than 6.2 daN (13.9382 lbf) and/or
the clearance is more than 0.25 mm (0.0098 in.).

Subtask 27-84-61-220-104-F ** ON A/C NOT FOR ALL

G. Friction Check of the Position of the Top, Aft Vertical-Roller at the Track

Side Roller and Vertical Roller - Location and Detail ** ON A/C NOT FOR ALL

Slat-Track Clearances ** ON A/C NOT FOR ALL

(1) Attach a GAGE - SPRING to the applicable track (1).

NOTE: During this check keep the spring gage in the line-of-travel of the track (1).

if the spring gage pulls the track (1), make a record of the maximum value shown
if the track (1) extends by its weight and the spring gage holds it back, make a record of the minimum value shown.

(4) Calculate the friction load as follows:

for two maximum values, the friction load is the sum of the two values
for one maximum value and one minimum value, the friction load is the difference of the two values.

(5) With the track (1) held against the two, top, vertical-rollers (32), move the track (1) through its full range of travel. Make sure that where the bottom, aft, vertical-roller (32) and the track (1) do not touch, the clearance (DIM. Y) is not more than 0.25 mm (0.0098 in.).
(6) Adjust the top, aft, vertical-roller (32), if:

the friction load is more than 6.5 daN (14.6126 lbf) and/or
the clearance is more than 0.25 mm (0.0098 in.).

Subtask 27-84-61-820-070-D

H. Adjustment of the Top, Aft Vertical-Roller

Side Roller and Vertical Roller - Location and Detail ** ON A/C NOT FOR ALL

(1) Remove and discard the lockwire from the bolt (28).
(2) Remove the bolt (28), the locking ring (29) and the locking plate (30).
(3) Move the applicable track (1) through its full range of travel.
(4) Adjust the eccentric bush (31) until the top, aft, vertical roller (32) touches the track (1) at its highest point.
(5) Apply a layer of Polysulfide Sealant-Low Adhesion Brushable - (Material No.06AEA1) or Polysulfide Sealant-Low Adhesion Fillet Structure (Material No.06AEB2) to the shank of the bolt (28).
(6) Install the locking plate (30) and the locking ring (29) with the bolt (28).
(7) Safety the bolt (28) with 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.
(8) Apply a layer of Corrosion Preventive Compound_Water Displacing Soft Film - (Material No.12ABC1) to the bolt (28), the locking ring (29) and the locking plate (30).

Subtask 27-84-61-820-072-C ** ON A/C NOT FOR ALL

I. Adjustment of the Front Stop

Slat-Track End-Stop - Location and Detail ** ON A/C NOT FOR ALL

Side Roller and Vertical Roller - Location and Detail ** ON A/C NOT FOR ALL

(1) Remove and discard the lockwire from the bolts (15) and the applicable stop (14).
(2) Remove the bolts (15) and the applicable front stop (14).
(3) Apply a layer of Polysulfide Sealant-Low Adhesion Brushable - (Material No.06AEA1) or Polysulfide Sealant-Low Adhesion Fillet Structure (Material No.06AEB2) to the shanks of the bolts (15).
(4) Loosely assemble the applicable stop (14) with the bolts (15).
(5) Put and hold the track (1) in its fully retracted position.
(6) Put the front stop (14) in position so that it is parallel with the bottom, forward, vertical-roller (32) and tighten the bolts (15).
(7) Safety the bolts (15) with 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.
(8) Apply a layer of Corrosion Preventive Compound-Heavy Duty Soft Film - (Material No.12ACC1) to the bolts (15).

Subtask 27-84-61-640-062-A

J. Lubrication
(1) Lubricate the side-rollers (25) and the top and bottom, vertical-rollers (33) with Synthetic Oil base Grease-General Purpose Lithium Thickened - (Material No.03GBD1) or Synthetic Ester base Grease-General Purpose Low Temp - (Material No.03HBD9) .

5. Close-up
Subtask 27-84-61-410-058-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) For the tracks 2 and 3, install the actuators (Ref. AMM TASK 27-84-48-400-001).
(3) Install the applicable access panels:

for the left wing, install the panels 521AB 521BB 521CB 521EB
for the right wing, install the panels 621AB 621BB 621CB 621EB

(Ref. AMM TASK 57-41-37-400-002) and (Ref. AMM TASK 57-41-37-400-005).
(4) Install the applicable closing plate(s) (Ref. AMM TASK 27-84-69-400-001).

Subtask 27-84-61-942-056-A

B. Removal of Equipment
(1) Remove the safety barriers.
(2) Remove the WARNING NOTICE(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 23:57:55 UTC