W DOC AIRBUS | AMM A320F

Installation of the Left Thrust Reverser Half - Eng No. 1 [IAE]

TASK 78-32-01-400-010-A
Installation of the Left Thrust Reverser Half - Eng No. 1

WARNING: DO NOT GET HYDRAULIC FLUID ON YOUR SKIN, IN YOUR EYES OR IN YOUR MOUTH. HYDRAULIC FLUID IS POISONOUS AND CAN GO THROUGH YOUR SKIN AND INTO YOUR BODY. FLUSH HYDRAULIC FLUID FROM YOUR EYES, MOUTH OR SKIN WITH WATER. GET MEDICAL AID IF YOU GET HYDRAULIC FLUID IN YOUR EYES OR MOUTH.
WARNING: BE CAREFUL DURING THE REMOVAL OR INSTALLATION OF THE THRUST REVERSER HALF. IT WEIGHS 567lb (257kg). IF IT FALLS, IT 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: DO NOT LET HYDRAULIC FLUID FALL ON THE ENGINE. UNWANTED HYDRAULIC FLUID MUST BE REMOVED IMMEDIATELY WITH A CLEAN LINT FREE CLOTH. THE FLUID CAN CAUSE DAMAGE TO THE SURFACE PROTECTION AND TO SOME PARTS.
CAUTION: WHEN YOU REMOVE/INSTALL THE THRUST REVERSER, BE CAREFUL NOT TO CAUSE DAMAGE TO THE PRESSURE BULKHEAD AND CROSSOVER BEAM TANGS.
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: 400
FIN: 3400KM1 ** ON A/C NOT FOR ALL
1. Reason for the Job
This task supplies the data for the installation of the left thrust reverser half.
NOTE: For interchangeability see IAE SIL-171.
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
AR
CONTAINER 5 L (1.32 USGAL)
No specific
AR
WARNING NOTICE(S)
No specific
Torque wrench: range to between 15 and 12 lbf.in (0.17 and 0.14 m.daN ) T
No specific
Torque wrench: range to between 25 and 20 lbf.in (0.28 and 0.23 m.daN ) T
No specific
Torque wrench: range to between 120 and 100 lbf.in (1.36 and 1.13 m.daN ) T
No specific
Torque wrench: range to between 190 and 160 lbf.in (2.15 and 1.81 m.daN ) T
No specific
Torque wrench: range to between 240 and 216 lbf.in (2.71 and 2.44 m.daN ) T
No specific
Torque wrench: range to between 255 and 225 lbf.in (2.88 and 2.54 m.daN ) T
No specific
Torque wrench: range to between 690 and 480 lbf.in (7.80 and 5.42 m.daN ) T
No specific
Torque wrench: range to between 936 and 852 lbf.in (10.58 and 9.63 m.daN ) T
IAE1N20002
1
SLING-FAN THRUST REVERSER
IAE1N20005
1
DOLLY-WORKSTAND THRUST REVERSER LEFT HAND
IAE1N20007
1
DOLLY-THRUST REVERSER
IAE1N20009
1
PUMP HYDRAULIC UNIT-REVERSER C-DUCT
IAE1N20049
2
PIN - LOCKOUT ACTUATOR
 B. Consumable Materials
REFERENCE
DESIGNATION
(Material No.V01-076)
Methyl Ethyl Ketone, Technical grade
(Material No.V04-012)
grease
(Material No.V08-021)
adhesive
(Material No.V10-077)
lubricant (engine oil)
(Material No.14SBA1)
Textile-Lint free Cotton -
 C. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
400
POWER PLANT, NACELLES AND PYLONS
FOR [1000EM1] (ENGINE-1)
437AL, 438AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR
 D. Referenced Information
REFERENCE
DESIGNATION
TASK 12-12-29-611-001-A
Fill the Hydraulic Fluid Reservoir with a Hand Pump
TASK 12-12-29-611-002-A
Fill the Hydraulic Fluid Reservoir with a Hydraulic Service Cart
TASK 29-14-00-614-002-A
Pressurization of the Hydraulic Reservoirs through the Ground Connector
TASK 29-14-00-614-002-A-01
Pressurization of the Hydraulic Reservoirs with the Auxiliary Power Unit (APU)
TASK 54-57-22-400-003-A
Installation of the Sections
TASK 70-23-11-911-013-A
General Torque Tightening Techniques
TASK 70-23-15-912-010-A
Connection of Electrical Connectors
TASK 70-40-11-911-014-A
Locking Devices General Information
TASK 71-13-00-010-010-A
Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 71-13-00-410-010-A
Closing of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 78-30-00-040-012-A
Deactivation of the Thrust Reverser Hydraulic Control Unit (HCU) for Ground Maintenance
TASK 78-30-00-440-012-A
Re-activation of the Thrust Reverser Hydraulic Control Unit (HCU) after Ground Maintenance
TASK 78-30-00-820-010-A
Rigging of the Thrust Reverser System
TASK 78-31-00-710-041-A
Operational Test of the Thrust Reverser System with the CFDS
TASK 78-31-00-710-041-A-02
Operational test of the Thrust Reverser without the CFDS and Engine Running
TASK 78-31-00-710-041-A
Operational Test of the Thrust Reverser System with the CFDS
TASK 78-31-00-710-041-A-02
Operational test of the Thrust Reverser without the CFDS and Engine Running
TASK 78-32-00-010-010-A
Opening of the Thrust Reverser Halves
F Thrust Reverser Half Opening Actuator
F Hydraulic Hand Pump Attachment
F Thrust Reverser Half and Sling
F Thrust Reverser Dolly and Workstand
F Thrust Reverser Half Hinges
F T/R Hydraulic Systems
F Thrust Reverser Guide Pads
F Locking Actuator
3. Job Set-up
Subtask 78-32-01-860-050-A ** ON A/C NOT FOR ALL
A. Aircraft Maintenance Configuration
   (1) On the center pedestal, on the ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
   (2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).
Subtask 78-32-01-010-054-A ** ON A/C NOT FOR ALL
B. Get Access
   (1) Make sure that the fan cowl doors are open: (Ref. AMM TASK 71-13-00-010-010)
     (a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
     (b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
Subtask 78-32-01-040-051-A ** ON A/C NOT FOR ALL
C. Make sure that the thrust reverser Hydraulic Control Unit (HCU) is deactivated (Ref. AMM TASK 78-30-00-040-012).
4. Procedure
Subtask 78-32-01-860-051-A ** ON A/C NOT FOR ALL
A. Do a check to make sure that the deflector boxes are in the correct positions as per SBN 78-0217: Nacelle-Thrust Reverser-Cascade Configuration-Engine Position #1 to #2 and vice versa.
Subtask 78-32-01-630-050-A ** ON A/C NOT FOR ALL
B. Remove the applicable covers/caps/plugs
   (1) Put the CONTAINER 5 L (1.32 USGAL) in to position to catch the drained hydraulic fluid.
   (2) Remove the applicable covers/caps/plugs from all of the openings.
   (3) Discard the drained hydraulic fluid.
Subtask 78-32-01-870-051-A ** ON A/C NOT FOR ALL
CAUTION: USE ONLY ENGINE OIL TO FILL THE HAND PUMP AND OPENING ACTUATOR SYSTEM.
C. If necessary, bleed the air from the opening actuator system
F Thrust Reverser Half Opening Actuator ** ON A/C NOT FOR ALL
F Hydraulic Hand Pump Attachment ** ON A/C NOT FOR ALL
NOTE: It is necessary to bleed the opening actuator system if you think that there could be caught air in the system.
   (1) Remove the nut (35), the washer (36), the screw (38) and the clamp (37) that attach the end cover (31) to the opening actuator (29).
F Thrust Reverser Half Opening Actuator ** ON A/C NOT FOR ALL
   (2) Disconnect the hose nut (32) from the opening actuator (29).
   (3) Connect the flex hose (67) of the IAE1N20009 PUMP HYDRAULIC UNIT-REVERSER C-DUCT (68) to the manifold connector (66).
F Hydraulic Hand Pump Attachment ** ON A/C NOT FOR ALL
   (4) Operate the IAE1N20009 PUMP HYDRAULIC UNIT-REVERSER C-DUCT until engine oil comes out of the end of the hose (34).
F Thrust Reverser Half Opening Actuator ** ON A/C NOT FOR ALL
   (5) Connect the hose nut (32) to the opening actuator (29).
   (6) TORQUE the hose nut (32) to between 120 and 100 lbf.in (1.36 and 1.13 m.daN ) T (Ref. AMM TASK 70-23-11-911-013).
   (7) Remove the flex hose (67) of the IAE1N20009 PUMP HYDRAULIC UNIT-REVERSER C-DUCT (68) from the manifold connector (66).
F Hydraulic Hand Pump Attachment ** ON A/C NOT FOR ALL
   (8) Close the end cover (31) and install the clamp (37), the scew (38), the washer (36) and the nut (35) that attach the end cover to the opening actuator (29).
F Thrust Reverser Half Opening Actuator ** ON A/C NOT FOR ALL
   (9) TORQUE the nut (35) to between 25 and 20 lbf.in (0.28 and 0.23 m.daN ) T (Ref. AMM TASK 70-23-11-911-013).
Subtask 78-32-01-480-051-A ** ON A/C NOT FOR ALL
D. Attach the thrust reverser sling
F Thrust Reverser Half and Sling ** ON A/C NOT FOR ALL
   (1) Attach the IAE1N20002 SLING-FAN THRUST REVERSER (3) to the three hoist points on the thrust reverser half (2).
   (2) Attach the sling to an applicable hoist.
Subtask 78-32-01-550-051-A ** ON A/C NOT FOR ALL
E. Remove the tie-down strap (55). Lift the thrust reverser half (2) from the dolly (56) IAE1N20005 DOLLY-WORKSTAND THRUST REVERSER LEFT HAND or IAE1N20007 DOLLY-THRUST REVERSER.
F Thrust Reverser Dolly and Workstand ** ON A/C NOT FOR ALL
Subtask 78-32-01-420-050-B ** ON A/C NOT FOR ALL
F. Installation of the Thrust Reverser Half
F Thrust Reverser Half Hinges ** ON A/C NOT FOR ALL
SBN 78-0063: Modification of the thrust reverser No.4 hinge installation hardware.
   (1) Align the thrust reverser half hinges with the hinges on the crossover beams on the pylon.
   (2) Install the hinge bolts.
     (a) Lubricate the No. 4 hinge bolt (57) with V10-077lubricant (engine oil).
     (b) Put the sleeve (41) into position on the thrust reverser No. 4 hinge and push it aft to allow clearance to install the bolt (57).
     (c) Install the washers (54) and bolt (57).
     (d) Install the nut (53) on the bolt (57). Do not tighten the nut at this step.
     (e) Lubricate the other three hinge bolts (43) with V10-077lubricant (engine oil).
     (f) Install the bolts (43) and washers (42) into the No. 1, 2 and 3 hinge positions.
     (g) Install the nuts (44) on the bolts (43).
     (h) TORQUE the nut (53) at hinge position No. 4 to between 690 and 480 lbf.in (7.80 and 5.42 m.daN ) T (Ref. AMM TASK 70-23-11-911-013).
     (i) Install the screw (50), washer (51) and bracket (52) to the web that is forward of the thrust reverser hinge at No. 4 position.
     (j) TORQUE the screw (50) to between 25 and 20 lbf.in (0.28 and 0.23 m.daN ) T (Ref. AMM TASK 70-40-11-911-014).
     (k) TORQUE the nuts (44) at the No. 1, 2 and 3 hinge positions to between 190 and 160 lbf.in (2.15 and 1.81 m.daN ) T (Ref. AMM TASK 70-23-11-911-013).
Subtask 78-32-01-080-051-A ** ON A/C NOT FOR ALL
G. Remove the thrust reverser sling (3), IAE1N20002 SLING-FAN THRUST REVERSER, from the upper hoist point on the thrust reverser half (2). Keep the sling attached to the other two hoist points.
F Thrust Reverser Half and Sling ** ON A/C NOT FOR ALL
Subtask 78-32-01-010-053-A ** ON A/C NOT FOR ALL
H. Open the thrust reverser half with the hoist
F Thrust Reverser Half and Sling ** ON A/C NOT FOR ALL
   (1) Lift and open the thrust reverser half (2) with the sling (3) and hoist.
   (2) Extend the rear and forward hold-open rods (to hold the thrust reverser half open) (Ref. AMM TASK 78-32-00-010-010).
Subtask 78-32-01-420-051-A ** ON A/C NOT FOR ALL
I. Attachment of the Thrust Reverser Half Opening Actuator
F Thrust Reverser Half Opening Actuator ** ON A/C NOT FOR ALL
WARNING: MAKE SURE THE HOSE OF THE HYDRAULIC HAND PUMP IS CONNECTED CORRECTLY TO THE T/R HALF OPENING ACTUATOR MANIFOLD. IF NOT, THE T/R HALF CAN CLOSE QUICKLY AND CAUSE INJURY TO PERSONS BETWEEN THE T/R HALF AND THE ENGINE.
   (1) Attach the hose (67) of the IAE1N20009 PUMP HYDRAULIC UNIT-REVERSER C-DUCT (68) to the opening actuator manifold connector (66) on the thrust reverser half (2).
F Hydraulic Hand Pump Attachment ** ON A/C NOT FOR ALL
   (2) Close the valve on the hand pump (68).
   (3) Operate the hand pump to extend the opening actuator (29).
   (4) Align the rod end of the opening actuator (29) with the pylon hinge beam (Ref. Fig. 403/TASK 78-32-01-991-152).
F Thrust Reverser Half Opening Actuator ** ON A/C NOT FOR ALL
   (5) Lubricate the bolt (30) with the penetrating oil V10-077lubricant (engine oil).
   (6) Install the bolt (30), bushing (27), washers (25) and (26) and nut (28) to attach the opening actuator (29) to the pylon hinge beam.
   (7) TORQUE the nut (28) to between 255 and 225 lbf.in (2.88 and 2.54 m.daN ) T (Ref. AMM TASK 70-23-11-911-013).
   (8) Connect the electrical connector of the pylon wire harness
F Thrust Reverser Half and Sling ** ON A/C NOT FOR ALL
     (a) Connect the electrical connector (1) to the thrust reverser half electrical receptacle. (Ref. AMM TASK 70-23-15-912-010)
     (b) Tighten the connector by hand plus one eighth of a turn.
   (9) Connect the crossover hydraulic hose and the crossover flexshaft/hose.
F T/R Hydraulic Systems ** ON A/C NOT FOR ALL
     (a) Connect the crossover hydraulic hose:
CAUTION: HOLD THE ACTUATOR CONNECTORS WITH A WRENCH WHILE YOU TIGHTEN THE HYDRAULIC CONNECTION TO PREVENT DAMAGE TO THE ACTUATOR.
       1 Connect the crossover hydraulic hose (17) to the non-locking actuator (16).
     (b) TORQUE the hose nut on the crossover hydraulic hose (17) to between 240 and 216 lbf.in (2.71 and 2.44 m.daN ) T (Ref. AMM TASK 70-23-11-911-013).
     (c) Engage the end of the flexshaft:
CAUTION: DO NOT TURN THE FLEXSHAFT MORE THAN ONE-EIGHTH OF A TURN WHILE THE END IS PUT IN TO POSITION.
       1 Engage the end of the crossover flexshaft/hose assembly (15) in to the socket of the non locking actuator (16).
     (d) Connect the crossover flexshaft/hose (15) to the non locking actuator (16).
     (e) TORQUE the hose nut on the crossover flexshaft/hose (15) to between 936 and 852 lbf.in (10.58 and 9.63 m.daN ) T (Ref. AMM TASK 70-23-11-911-013).
Subtask 78-32-01-080-052-A ** ON A/C NOT FOR ALL
J. Remove the thrust reverser sling and the slat protection mat
F Thrust Reverser Half and Sling ** ON A/C NOT FOR ALL
   (1) Remove the IAE1N20002 SLING-FAN THRUST REVERSER (3) from the thrust reverser half (2).
   (2) install the threaded fasteners in the hoist point nut plates.
   (3) Remove the slat protection mats from the slats.
5. Close-up
Subtask 78-32-01-640-050-A ** ON A/C NOT FOR ALL
A. Apply grease (Material No.V04-012) to all exposed thrust reverser closing seals, V-blade system and the open latch indicator.
Subtask 78-32-01-410-051-A ** ON A/C NOT FOR ALL
B. Make sure the thrust reverser half is closed correctly.
   (1) Make sure that the thrust reverser halves are adjusted correctly (Ref. AMM TASK 78-30-00-820-010).
Subtask 78-32-01-220-050-A ** ON A/C NOT FOR ALL
C. Examination of the Clearance between the Guide Pads and the Thrust Reverser No. 1 Open Latch Indicator
F Thrust Reverser Guide Pads ** ON A/C NOT FOR ALL
NOTE: This procedure is only for thrust reversers with guide pads installed.
   (1) Make sure that there is a minimun clearance of 0.25 mm (0.0098 in.) between the guide pads and both side of the thrust reverser No. 1 open latch indicator. If the clearance is not a minimun of 0.25 mm (0.0098 in.) , adjust the clearance.
Subtask 78-32-01-350-050-A ** ON A/C NOT FOR ALL
D. Adjustment of the Clearance between the Guide Pads and the Thrust Reverser No. 1 Open Latch Indicator
F Thrust Reverser Guide Pads ** ON A/C NOT FOR ALL
NOTE: This procedure is only for thrust reversers that have guide pads installed.
   (1) Remove the nut (72), the washer (71) and the screw (70) from the guide pads (73) and the shims (74).
   (2) Remove the necessary amount of plies from the shim (74) or use a new shim to obtain the correct clearance.
Subtask 78-32-01-110-050-A ** ON A/C NOT FOR ALL
E. Cleaning the Shims and the Thrust Reverser Mating Surfaces
   (1) Clean the shims and the thrust reverser mating surfaces with a clean Textile-Lint free Cotton - (Material No.14SBA1) made moist with V01-076Methyl Ethyl Ketone, Technical grade (Ref 70-30-00).
   (2) Remove the cleaning fluid with a clean Textile-Lint free Cotton - (Material No.14SBA1) before it become dry.
Subtask 78-32-01-370-050-A ** ON A/C NOT FOR ALL
F. Application of the Adhesive
WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
   (1) Mix the adhesive (Material No.V08-021) . Refer to the manufacturers instructions.
   (2) Apply a surface layer of adhesive to the mating surfaces of the shims and the thrust reverser structure.
Subtask 78-32-01-410-055-A ** ON A/C NOT FOR ALL
G. Installation of the Shims and the Guide Pads
F Thrust Reverser Guide Pads ** ON A/C NOT FOR ALL
   (1) Put the shims (74) and guide pads (73) into position on the thrust reverser structure.
   (2) Install the screw (70), the washer (71) and the nut (72).
   (3) TORQUE the nut (72) to between 15 and 12 lbf.in (0.17 and 0.14 m.daN ) T (Ref. AMM TASK 70-23-11-911-013).
Subtask 78-32-01-410-052-A ** ON A/C NOT FOR ALL
H. Install the hinge access panel
F Thrust Reverser Half and Sling ** ON A/C NOT FOR ALL
   (1) Position the hinge access panel (4) on the thrust reverser half.
   (2) Attach the hinge access panel with the 11 screws (5).
Subtask 78-32-01-410-056-A ** ON A/C NOT FOR ALL
I. Install the profiles (Ref. AMM TASK 54-57-22-400-003).
Subtask 78-32-01-410-054-A ** ON A/C NOT FOR ALL
J. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
Subtask 78-32-01-820-050-A ** ON A/C NOT FOR ALL
K. Adjustment of the Thrust reverser System
   (1) Adjust the thrust reverser latches, bumpers, compression struts, translating sleeves and actuators (Ref. AMM TASK 78-30-00-820-010)
Subtask 78-32-01-440-050-A ** ON A/C NOT FOR ALL
L. Activate the thrust reverser Hydraulic Control Unit (HCU) (Ref. AMM TASK 78-30-00-440-012).
Subtask 78-32-01-870-050-A ** ON A/C NOT FOR ALL
M. Bleed the air from the thrust reverser hydraulic actuation system
F Locking Actuator ** ON A/C NOT FOR ALL
CAUTION: MAKE SURE THAT ALL CAUGHT AIR IS BLED FROM THE SYSTEM. IF YOU DO NOT DO THIS, CAUGHT AIR CAN CAUSE UNSATISFACTORY OPERATION OF THE TRANSLATING SLEEVES. TEN CYCLES OF TRANSLATING SLEEVE POWER EXTENSION AND RETRACTION WILL REMOVE ALL CAUGHT AIR FROM THE SYSTEM.
CAUTION: YOU MUST MOVE THE LOCK LEVERS OF THE TWO LOCKING ACTUATORS AFT TO THE UNLOCKED POSITION BEFORE YOU BLEED THE SYSTEM. IF YOU DO NOT DO THIS, UNEVEN OPERATION OF THE TRANSLATING SLEEVES CAN CAUSE DAMAGE TO THE SYSTEM.
   (1) Move the lock levers of the left and right locking actuators aft to the unlocked position and install the IAE1N20049 PIN - LOCKOUT ACTUATOR, to hold the lock levers in the unlocked position.
   (2) Operate the translating sleeve
WARNING: MAKE SURE THAT THERE ARE NO PERSONS IN THE AREA AROUND THE THRUST REVERSER BEFORE YOU DO A POWER EXTENSION OR RETRACTION OF THE TRANSLATING SLEEVES. THE TRANSLATING SLEEVES EXTEND AND RETRACT IN 4.5 SECONDS OR LESS AND CAN CAUSE INJURY AND DAMAGE.
     (a) Operate the system through ten cycles of translating sleeve power extension and retraction (Ref. AMM TASK 78-31-00-710-041).
   (3) Remove the lockout pins
CAUTION: THE LOCKING ACTUATOR LOCK LEVERS MUST BE IN THE FORWARD LOCKED POSITION FOR FLIGHT OPERATION.
     (a) Remove the lockout pins (IAE1N20049) from the lock levers of the left and right locking actuators and move the lock levers forward to the locked position.
   (4) Refill the hydraulic reservoir (Ref. AMM TASK 12-12-29-611-001) or (Ref. AMM TASK 12-12-29-611-002).
Subtask 78-32-01-614-051-A ** ON A/C NOT FOR ALL
N. Pressurization of the Hydraulic Reservoir
   (1) For engine 1 pressurize the Green hydraulic reservoir (Ref. AMM TASK 29-14-00-614-002).
   (2) For engine 2 pressurize the Yellow hydraulic reservoir (Ref. AMM TASK 29-14-00-614-002).
Subtask 78-32-01-410-053-A ** ON A/C NOT FOR ALL
O. Close Access
   (1) Close the fan cowls (Ref. AMM TASK 71-13-00-410-010):
     (a) FOR [1000EM1] (ENGINE-1)
437AL 438AR.
     (b) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
   (2) Remove the WARNING NOTICE(S).
Subtask 78-32-01-710-052-A ** ON A/C NOT FOR ALL
P. Operational Test
   (1) Do an operational test of the thrust reverser system (Ref. AMM TASK 78-31-00-710-041).
NOTE: As an alternative procedure, you can do the operational test without the CFDS (Ref. AMM TASK 78-31-00-710-041).
[Rev.10 from 2021] 2026.04.01 03:28:03 UTC
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