W DOC AIRBUS | AMM A320F

Installation of the Pylon Tubes and Hoses [CFML]

TASK 78-31-49-400-815-A
Installation of the Pylon Tubes and Hoses

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.
WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
1. Reason for the Job
NOTE: The left hand lower actuator is also known as the synchronized non-locking actuator.
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
1
CONTAINER - HYDRAULIC FLUID RESISTANT
No specific
AR
WARNING NOTICE(S)
No specific
Torque wrench: range to between 0.43 and 0.36 m.daN (38.05 and 31.86 lbf.in ) T
No specific
Torque wrench: range to between 0.48 and 0.37 m.daN (42.48 and 32.74 lbf.in ) T
No specific
Torque wrench: range to between 0.54 and 0.46 m.daN (47.79 and 40.71 lbf.in ) T
No specific
Torque wrench: range to between 2.26 and 2.03 m.daN (16.67 and 14.97 lbf.ft ) T
No specific
Torque wrench: range to between 3.16 and 2.43 m.daN (23.30 and 17.92 lbf.ft ) T
No specific
Torque wrench: range to between 3.62 and 2.82 m.daN (26.70 and 20.80 lbf.ft ) T
No specific
Torque wrench: range to between 3.48 and 2.96 m.daN (25.66 and 21.83 lbf.ft ) T
No specific
Torque wrench: range to between 6.21 and 5.31 m.daN (45.80 and 39.16 lbf.ft ) T
 B. Consumable Materials
REFERENCE
DESIGNATION
(Material No.CPNCL00062)
LUBRICATING OIL TURBINE ENGINE SYNT BASE
 C. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL, 438AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR
 D. Expendable Parts
FIG.ITEM
DESIGNATION
IPC-CSN
50
WASHER
AIPC 78-31-49-06-120
70
WASHER
AIPC 78-31-49-06-120
85
WASHER
AIPC 78-31-49-06-120
66
WASHER
AIPC 78-31-49-06-150
 E. Referenced Information
REFERENCE
DESIGNATION
TASK 71-00-00-710-815-A
Idle Leak Check
TASK 71-13-00-010-803-A
Opening of the Fan Cowl Doors
TASK 71-13-00-410-803-A
Closing of the Fan Cowl Doors
TASK 73-11-46-000-802-A
Removal of the Main Fuel Line from the Pylon to the Fuel Pump
TASK 73-11-46-400-802-A
Installation of the Main Fuel Line from the Pylon to the Fuel Pump
TASK 73-11-49-000-804-A
Removal of the Fuel Return Hose from the Fuel Return Valve (FRV) to the Pylon
TASK 73-11-49-400-804-A
Installation of the Fuel Return Hose from the Fuel Return Valve (FRV) to the Pylon
TASK 73-29-00-740-804-A
Thrust Reverser Cycling Test (Menu Mode)
TASK 78-30-00-040-807-A
Deactivation of the Thrust Reverser System for Nacelle Maintenance (ICU)
TASK 78-30-00-440-807-A
Reactivation of the Thrust Reverser System after Nacelle Maintenance (ICU)
TASK 78-31-44-400-802-A
Installation of the Sync Tubes, Sync Shafts, Flex Tube and Flex Shaft
F Pylon Tubes and Hoses
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
TASK 29-10-00-863-001-A
Pressurize the Green Hydraulic System with a Hydraulic Ground Power-Cart
TASK 29-10-00-864-001-A
Depressurize the Green Hydraulic System
TASK 29-11-49-000-809-A
Removal of the Hydraulic Pressure Line from the Pylon to the Green Hydraulic Pump
TASK 29-11-49-000-810-A
Removal of the Hydraulic Case Drain-Line from the Pylon to the Green Hydraulic Pump
TASK 29-11-49-000-811-A
Removal of the Hydraulic Suction Line from the Pylon to the Green Hydraulic Pump
TASK 29-11-49-400-809-A
Installation of the Hydraulic Pressure Line from the Pylon to the Green Hydraulic Pump
TASK 29-11-49-400-810-A
Installation of the Hydraulic Case Drain-Line from the Pylon to the Green Hydraulic Pump
TASK 29-11-49-400-811-A
Installation of the Hydraulic Suction Line from the Pylon to the Green Hydraulic Pump
TASK 29-14-00-614-001-A
Depressurization of the Hydraulic Reservoirs
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)
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
TASK 29-10-00-863-002-A
Pressurize the Yellow Hydraulic System with a Hydraulic Ground Power-Cart
TASK 29-10-00-864-002-A
Depressurize the Yellow Hydraulic System
TASK 29-13-49-000-808-A
Removal of the Hydraulic Pressure Line from the Pylon to the Yellow Hydraulic Pump
TASK 29-13-49-000-809-A
Removal of the Hydraulic Case Drain Line from the Pylon to the Yellow Hydraulic Pump
TASK 29-13-49-000-810-A
Removal of the Hydraulic Suction Line from the Pylon to the Yellow Hydraulic Pump
TASK 29-13-49-400-808-A
Installation of the Hydraulic Pressure Line from the Pylon to the Yellow Hydraulic Pump
TASK 29-13-49-400-809-A
Installation of the Hydraulic Case Drain Line from the Pylon to the Yellow Hydraulic Pump
TASK 29-13-49-400-810-A
Installation of the Hydraulic Suction Line from the Pylon to the Yellow Hydraulic Pump
TASK 29-14-00-614-001-A
Depressurization of the Hydraulic Reservoirs
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)
3. Job Set-up
Subtask 78-31-49-941-134-A
A. Safety Precautions
   (1) On the center pedestal, on ENG panel 115VU:
     (a) Make sure that the ENG/MODE selector switch is in the NORM position.
     (b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
     (c) Make sure that the WARNING NOTICE(S) are in position to tell persons not to operate:
  • The ENG/MODE selector switch
  • The ENG/MASTER 1(2) control switch.
   (2) On the ENG section of maintenance panel 50VU:
     (a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
     (b) Make sure that the WARNING NOTICE(S) is in position to tell persons not to energize FADEC 1(2).
Subtask 78-31-49-010-237-A
B. Get Access
   (1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-803):
     (a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
     (b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
   (2) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position.
Subtask 78-31-49-040-182-A
C. Deactivation of the Thrust Reverser System for Maintenance
WARNING: YOU MUST DEACTIVATE THE THRUST REVERSER BEFORE YOU DO WORK ON OR AROUND IT. IF YOU DO NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE AN INJURY AND/OR DAMAGE.
   (1) Make sure that you did the deactivation of the thrust reverser system for nacelle maintenance (Ref. AMM TASK 78-30-00-040-807).
Subtask 78-31-49-864-057-A
D. Depressurize the aircraft hydraulic systems
   (1) Make sure that the WARNING NOTICE(S) is in position to tell persons not to pressurize the applicable system.
     (a) On the HYD/FUEL panel 40VU of the overhead panel
     (b) On the ground service panel of the applicable hydraulic system.
   (2) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
     (a) Make sure that the Green hydraulic system is depressurized
(Ref. AMM TASK 29-10-00-864-001).
     (b) Make sure that the reservoir of the Green hydraulic system is depressurized
(Ref. AMM TASK 29-14-00-614-001).
   (3) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
     (a) Make sure that the Yellow hydraulic system is depressurized.
(Ref. AMM TASK 29-10-00-864-002).
     (b) Make sure that the reservoir of the Yellow hydraulic system is depressurized.
(Ref. AMM TASK 29-14-00-614-001).
Subtask 78-31-49-010-241-A
E. Get Access
   (1) Make sure the CONTAINER - HYDRAULIC FLUID RESISTANT is in position under the hydraulic connections.
   (2) Make sure that these connections are disconnected from the pylon:
  • Hydraulic pressure line
  • Hydraulic suction line
  • Hydraulic case drain line
  • Fuel supply line
  • Fuel return line.
Subtask 78-31-49-010-245-A
F. Get Access
   (1) Make sure that the CONTAINER - HYDRAULIC FLUID RESISTANT is in position under the hydraulic connections.
   (2) Disconnect the following fuel connections from the pylon:
     (a) Fuel supply line (Ref. AMM TASK 73-11-46-000-802).
     (b) Fuel return line (Ref. AMM TASK 73-11-49-000-804).
   (3) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
     (a) Disconnect the following hydraulic connections from the pylon:
       1 Hydraulic pressure line (Ref. AMM TASK 29-11-49-000-809).
       2 Hydraulic suction line (Ref. AMM TASK 29-11-49-000-811).
       3 Hydraulic case drain line (Ref. AMM TASK 29-11-49-000-810).
   (4) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
     (a) Disconnect the following hydraulic connections from the pylon:
       1 Hydraulic pressure line (Ref. AMM TASK 29-13-49-000-808).
       2 Hydraulic suction line (Ref. AMM TASK 29-13-49-000-810).
       3 Hydraulic case drain line (Ref. AMM TASK 29-13-49-000-809).
4. Procedure
Subtask 78-31-49-420-178-A
A. Installation of the Pylon Tubes and Hoses
F Pylon Tubes and Hoses
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: WEAR APPLICABLE PERSONAL PROTECTIVE EQUIPMENT (PPE) WHEN YOU DO THIS TASK. BEFORE YOU USE PPE, READ, UNDERSTAND AND OBEY ALL INSTRUCTIONS FOR ITS USE. THESE INSTRUCTIONS INCLUDE INSTRUCTIONS FROM THE MANUFACTURER, YOUR EMPLOYER AND GOVERNMENT REGULATIONS. YOU CAN GET INJURED IF YOU DO NOT USE PPE. GET INSTRUCTIONS FROM YOUR EMPLOYER ON WHICH PPE IS NECESSARY.
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.
   (1) Remove all COVER - PROTECTION and CAP - PROTECTION from the openings, tubes, hoses and connectors.
   (2) Install the pylon tubes (13) and (59) as follows:
NOTE: Each time TRIPLE TORQUE is necessary, do as follows:
  • TORQUE the connection to the necessary torque value.
  • Loosen the connection and TORQUE it to the necessary torque value a second time.
  • TORQUE the connection to the necessary torque value a third time.
     (a) Lubricate the threads of the bolts (23), (27) and (36) with LUBRICATING OIL TURBINE ENGINE SYNT BASE (Material No.CPNCL00062) .
     (b) Install the P-clamps (24), (31) and (35) on the pylon tube (13).
     (c) Use the record made during the removal procedure to set the P-clamps in the correct location and position.
     (d) Put the pylon tube (13) into position on the pylon.
     (e) Attach the P-clamps (24), (31), and (35) to the support brackets (25), (30), and (37) with the bolts (23), (27), and (36), and tighten them with your hand.
     (f) Put the pylon tube (59) into position on the pylon.
     (g) Connect the coupling nut (57) of the pylon tube (59) to the pylon interface and tighten them with your hand.
     (h) Install the crossover brackets (48) and (49) to the pylon as follows:
       1 Put the nut (61) and washer (62) on the right-side hydraulic connection (60) of the pylon tube (59).
       2 Put the nut (56) and washer (55) on the left-side hydraulic connection (58) of the pylon tube (59).
       3 Put the nut (80) and washer (81) on the right-side hydraulic connection (79) of the pylon tube (13).
       4 Put the nut (76) and washer (75) on the left-side hydraulic connection (77) of the pylon tube (13).
       5 Put and adjust the pylon tubes (13) and (59) and crossover brackets (48) and (49) in position on the pylon.
       6 Attach the crossover brackets (48) and (49) to the pylon with the bolts and washers, and tighten them with your hand.
       7 TORQUE the bolts (23), (27) and (36) attaching P-clamps (24), (31) and (35) to between 0.43 and 0.36 m.daN (38.05 and 31.86 lbf.in ) T.
       8 TORQUE the bolts attaching crossover brackets (48) and (49) to pylon to between 0.54 and 0.46 m.daN (47.79 and 40.71 lbf.in ) T.
     (i) Install washer (86), new key AIPC 78-31-49-06-120 WASHER (85) and nut (84) that attach the pylon tube (13) to the right side of crossover brackets (48). Tighten nut (84) with your hand.
     (j) Install washer (71), new key AIPC 78-31-49-06-120 WASHER (70) and nut (72) that attach the pylon tube (13) to the left side of the crossover brackets (49). Tighten nut (72) with your hand.
     (k) Install the washer (67), new key AIPC 78-31-49-06-150 WASHER (66) and nut (65) that attach the pylon tube (59) to the right side of the crossover brackets (48). Tighten nut (65) with your hand.
     (l) Install washer (51), new key AIPC 78-31-49-06-120 WASHER (50) and nut (52) that attach the pylon tube (59) to the left side of the crossover brackets (49). Tighten nut (52) with your hand.
     (m) TORQUE the nuts (84), (80), (72), (76), (52) and (56) to between 3.48 and 2.96 m.daN (25.66 and 21.83 lbf.ft ) T.
     (n) TORQUE the nuts (65) and (61) to between 2.26 and 2.03 m.daN (16.67 and 14.97 lbf.ft ) T.
     (o) TRIPLE TORQUE the coupling nut (57) of the pylon tube (59) to between 6.21 and 5.31 m.daN (45.80 and 39.16 lbf.ft ) T.
   (3) Install the pylon tube (12) as follows:
     (a) Lubricate the threads of the bolts (22) and (28) with LUBRICATING OIL TURBINE ENGINE SYNT BASE (Material No.CPNCL00062) .
     (b) Install the P-clamps (21) and (26) on the pylon tube (12).
     (c) Use the record made during the removal procedure to set the P-clamps in the correct location and position.
     (d) Attach the P-clamps (21) and (26) to the support brackets (20) and (30) with the bolts (22) and (28) and tighten them with your hand.
     (e) Connect the coupling nut (29) of the pylon tube (12) to the pylon interface and tighten them with your hand.
     (f) TORQUE the bolts (22) and (28) that attach P-clamps (21) and (26) to between 0.43 and 0.36 m.daN (38.05 and 31.86 lbf.in ) T.
     (g) TRIPLE TORQUE coupling nut (29) of the pylon tube (12) to between 3.16 and 2.43 m.daN (23.30 and 17.92 lbf.ft ) T.
   (4) Install the pylon hose (53) as follows:
CAUTION: WHEN YOU INSTALL THE FLEX HOSES, USE A SECOND WRENCH TO APPLY COUNTER TORQUE TO THE ANTI ROTATION DEVICES OF THE HOSES. IF THE HOSES HAVE BENDS, MAKE SURE THAT, AFTER INSTALLATION, THE BENDS ARE IN THE VERTICAL POSITION AND THAT THERE IS NO TORSION IN THE HOSES. IF YOU DO NOT OBEY THESE INSTRUCTIONS, DAMAGE TO THE FLEX HOSES CAN OCCUR.
     (a) Connect the coupling nut (97) of the pylon hose (53) to the hydraulic tube (96).
     (b) Connect the coupling nut (54) of the pylon hose (53) to the hydraulic connection (58) at the support bracket (49) on the pylon.
     (c) TRIPLE TORQUE the coupling nuts (54) and (97) to between 6.21 and 5.31 m.daN (45.80 and 39.16 lbf.ft ) T.
   (5) Install the pylon hose (73) as follows:
     (a) Connect the coupling nut (98) of the pylon hose (73) to the hydraulic tube (95).
     (b) Connect the coupling nut (74) of the pylon hose (73) to the hydraulic connection (77) at the support bracket (49) on the pylon.
     (c) TRIPLE TORQUE the coupling nuts (74) and (98) to between 6.21 and 5.31 m.daN (45.80 and 39.16 lbf.ft ) T.
   (6) Install the pylon hose (63) as follows:
     (a) Connect the coupling nut (91) of the pylon hose (63) to the hydraulic tube (92).
     (b) Connect the coupling nut (64) of the pylon hose (63) to the hydraulic connection (60) at the support bracket (48) on the pylon.
     (c) TRIPLE TORQUE the coupling nuts (64) and (91) to between 3.62 and 2.82 m.daN (26.70 and 20.80 lbf.ft ) T.
   (7) Install the pylon hose (82) as follows:
     (a) Connect the coupling nut (94) of the pylon hose (82) to the hydraulic tube (93).
     (b) Connect the coupling nut (83) of the pylon hose (82) to the hydraulic connection (79) at the support bracket (48) on the pylon.
     (c) TRIPLE TORQUE the coupling nuts (83) and (94) to between 6.21 and 5.31 m.daN (45.80 and 39.16 lbf.ft ) T.
   (8) Install the pylon hose (5) as follows:
     (a) Lubricate the threads of the bolt (8) with LUBRICATING OIL TURBINE ENGINE SYNT BASE (Material No.CPNCL00062) .
     (b) Install the P-clamp (7) on the pylon hose (5).
     (c) Use the record made during the removal procedure to set the P-clamp in the correct location and position.
     (d) Put support bracket (6) on the position inside pylon structure.
     (e) Attach the P-clamp (7) to the support bracket (6) with the bolt (8) and washer (100) and tighten them with your hand.
     (f) Connect the coupling nut (10) of the pylon hose (5) to the pylon tube (12) and tighten them with your hand.
     (g) Connect the coupling nut (1) of the pylon hose (5) to the ICU (2) and tighten them with your hand.
     (h) TORQUE the bolt (8) that attaches P-clamps (7) to between 0.54 and 0.46 m.daN (47.79 and 40.71 lbf.in ) T.
     (i) TRIPLE TORQUE coupling nut (10) and (1) to between 3.16 and 2.43 m.daN (23.30 and 17.92 lbf.ft ) T.
   (9) Install the pylon hose (4) as follows:
     (a) Lubricate the threads of the bolt (9) with LUBRICATING OIL TURBINE ENGINE SYNT BASE (Material No.CPNCL00062) .
     (b) Install the P-clamp (16) on the pylon hose (4).
     (c) Use the record made during the removal procedure to set the P-clamp in the correct location and position.
     (d) Attach the P-clamp (16) to the support bracket (6) with the bolt (9) and washer (100) and tighten them with your hand.
     (e) Connect the coupling nut (15) of the pylon hose (4) to the pylon tube (13) and tighten them with your hand.
     (f) Connect the coupling nut (3) of the pylon hose (4) to the ICU (2) and tighten them with your hand.
     (g) TORQUE the bolt (9) that attaches P-clamps (16) to between 0.54 and 0.46 m.daN (47.79 and 40.71 lbf.in ) T.
     (h) TRIPLE TORQUE coupling nut (15) and (3) to between 6.21 and 5.31 m.daN (45.80 and 39.16 lbf.ft ) T.
   (10) Install the bracket (104) and harness block (105) as follows:
     (a) Install the two bolts and two washers that attach the bracket (104) to the pylon.
     (b) TORQUE the bolts to between 0.48 and 0.37 m.daN (42.48 and 32.74 lbf.in ) T.
     (c) Install the two bolts (103) that attach the harness block (105) to the bracket (104).
     (d) TORQUE the bolts (103) to between 0.43 and 0.36 m.daN (38.05 and 31.86 lbf.in ) T.
   (11) Install the flex tube (41) (Ref. AMM TASK 78-31-44-400-802).
   (12) Connect the following connections to the pylon:
     (a) Fuel supply line (Ref. AMM TASK 73-11-46-400-802).
     (b) Fuel return line (Ref. AMM TASK 73-11-49-400-804).
   (13) Connect the following hydraulic connections to the pylon:
     (a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
       1 Hydraulic pressure line (Ref. AMM TASK 29-11-49-400-809).
       2 Hydraulic suction line (Ref. AMM TASK 29-11-49-400-811).
       3 Hydraulic case drain line (Ref. AMM TASK 29-11-49-400-810).
     (b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
       1 Hydraulic pressure Line (Ref. AMM TASK 29-13-49-400-808).
       2 Hydraulic suction line (Ref. AMM TASK 29-13-49-400-810).
       3 Hydraulic case drain line (Ref. AMM TASK 29-13-49-400-809).
5. Close-up
Subtask 78-31-49-863-052-A
A. Pressurize the aircraft hydraulic systems
   (1) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
     (a) Pressurize the reservoir of the Green hydraulic system (Ref. AMM TASK 29-14-00-614-002).
     (b) Pressurize the Green hydraulic system
(Ref. AMM TASK 29-10-00-863-001).
   (2) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
     (a) Pressurize the reservoir of the Yellow hydraulic system (Ref. AMM TASK 29-14-00-614-002).
     (b) Pressurize the Yellow hydraulic system
(Ref. AMM TASK 29-10-00-863-002).
Subtask 78-31-49-440-119-A
B. Do the reactivation of the thrust reverser system after nacelle maintenance (Ref. AMM TASK 78-30-00-440-807).
Subtask 78-31-49-870-051-A
C. Bleed the thrust reverser hydraulic system
   (1) Do the thrust reverser cycling test ten times (Ref. AMM TASK 73-29-00-740-804).
Subtask 78-31-49-710-094-A
D. Do the idle leak check (Ref. AMM TASK 71-00-00-710-815).
Subtask 78-31-49-740-051-A
E. Do the thrust reverser cycling test (menu mode) (Ref. AMM TASK 73-29-00-740-804).
Subtask 78-31-49-410-128-A
F. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-803):
     (a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
     (b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
   (3) Remove the access platform(s).
   (4) Remove the WARNING NOTICE(S).
[Rev.10 from 2021] 2026.04.01 03:35:27 UTC
"Aviabrain" 2025