W DOC AIRBUS | AMM A320F

Installation of the Lower BiFi [PW11]

TASK 72-21-11-400-801-A
Installation of the Lower BiFi

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AND THE ADJACENT COMPONENTS AFTER ENGINE SHUTDOWN. THE ENGINE, THE ENGINE OIL AND THE ADJACENT COMPONENTS CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.
WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
ZONE: 400
1. Reason for the Job
Use this procedure to install the lower BiFi.
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
1
ACCESS PLATFORM 1M(3 FT)
No specific
Torque wrench: range to between 100 and 90 lbf.in (1.13 and 1.02 m.daN ) T
No specific
Torque wrench: range to between 195 and 175 lbf.in (2.20 and 1.98 m.daN ) T
 B. Consumable Materials
REFERENCE
DESIGNATION
(Material No.P05-136)
PMC 4273 tape, high temperature glass cloth
(Material No.P05-191)
tape, electrical insulating, self-adhering, high temperature
(Material No.P05-291)
cable, safety
(Material No.P05-292)
ferrule, safety cable
(Material No.P06-054)
PWA 36246 anti-seize paste
(Material No.P09-014)
PWA 36003-1 sealant, silicone rubber
 C. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
400
POWER PLANT, NACELLES AND PYLONS
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR, 451AL
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR, 461AL
 D. Referenced Information
REFERENCE
DESIGNATION
TASK 71-00-00-860-833-A
Procedure to Prevent Engine Motoring
TASK 71-13-00-010-802-A
Opening of the Fan Cowl Doors
TASK 71-13-00-410-802-A
Closing of the Fan Cowl Doors
TASK 78-30-00-040-805-A
Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-30-00-440-805-A
Reactivation of the Thrust Reverser System after Ground Maintenance
TASK 78-36-00-010-802-A
Opening of the Thrust Reverser Cowl-Doors
TASK 78-36-00-410-802-A
Closing of the Thrust Reverser Cowl-Doors
F Lower BiFi - Wiring Harness (W03 and W04) and Ignition Cables Locator
3. Job Set-up
Subtask 72-21-11-941-052-A ** ON A/C NOT FOR ALL
A. Safety Precautions
   (1) Make sure that you did the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).
Subtask 72-21-11-010-054-A ** ON A/C NOT FOR ALL
B. Get Access
   (1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-802):
     (a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL and 438AR
     (b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL and 448AR.
   (2) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.
Subtask 72-21-11-040-052-A ** ON A/C NOT FOR ALL
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 maintenance (Ref. AMM TASK 78-30-00-040-805).
Subtask 72-21-11-010-055-A ** ON A/C NOT FOR ALL
D. Get Access
   (1) Make sure that the left thrust reverser cowl-door is open (Ref. AMM TASK 78-36-00-010-802):
     (a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL
     (b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL.
4. Procedure
CAUTION: WIPE CLEAN ALL PARTS AND TOOLS AS NECESSARY TO REMOVE UNWANTED DEBRIS AND PREVENT DAMAGE TO THE ENGINE.
Subtask 72-21-11-420-050-A ** ON A/C NOT FOR ALL
A. Installation of the Lower BiFi
   (1) Removal of the protection covers:
CAUTION: REMOVE THE PROTECTION COVERS FROM THE OPENINGS AS NECESSARY TO PREVENT ENGINE DAMAGE.
     (a) Make sure that you remove all the necessary COVER - PROTECTION to prevent damage to the engine.
   (2) Install the insulation blanket (9), block clamps (2) and (19) and bracket (20) as follows:
F Lower BiFi - Wiring Harness (W03 and W04) and Ignition Cables Locator ** ON A/C NOT FOR ALL
     (a) Apply PWA 36246 anti-seize paste (Material No.P06-054) to the threads of the eight bolts (1), eleven bolts (3) and bolt (6).
NOTE: For new or refurbished bolts or nuts with baked on lubricant, do not do the wet application.
     (b) Install the bracket (20) to the three tubes (LR02), (LB02) and (LP02) loose.
F Lower BiFi - Wiring Harness (W03 and W04) and Ignition Cables Locator ** ON A/C NOT FOR ALL
NOTE: This is for ease of assembly later in this procedure.
     (c) Engage the three tubes (LR02), (LB02) and (LP02) to the insulation blanket (9).
F Lower BiFi - Wiring Harness (W03 and W04) and Ignition Cables Locator ** ON A/C NOT FOR ALL
     (d) Wind the P05-136PMC 4273 tape, high temperature glass cloth around the ignition cables.
F Lower BiFi - Wiring Harness (W03 and W04) and Ignition Cables Locator ** ON A/C NOT FOR ALL
NOTE: The P05-136PMC 4273 tape, high temperature glass cloth must be to between 0.75 in. (19.05 mm) and 1.25 in. (31.75 mm) from each side of the block clamp assembly and the full length of the clamped area after installation.
     (e) Wind the P05-136PMC 4273 tape, high temperature glass cloth around the wiring harnesses (W03) and (W04).
F Lower BiFi - Wiring Harness (W03 and W04) and Ignition Cables Locator ** ON A/C NOT FOR ALL
NOTE: The P05-136PMC 4273 tape, high temperature glass cloth must be to between 0.75 in. (19.05 mm) and 1.25 in. (31.75 mm) from each side of the block clamp assembly and the full length of the clamped area after installation.
     (f) Engage the ignition cables and the wiring harnesses (W03) and (W04) to the insulation blanket (9).
     (g) Connect the two sleeves (7) and (8) around the ignition cables with the two bolts (3) fingertight.
F Lower BiFi - Wiring Harness (W03 and W04) and Ignition Cables Locator ** ON A/C NOT FOR ALL
     (h) Connect the two sleeves (4) and (5) around the wiring harnesses (W03) and (W04) with the bolt (6) fingertight.
     (i) TORQUE the two bolts (3) to between 100 and 90 lbf.in (1.13 and 1.02 m.daN ) T.
     (j) TORQUE the bolt (6) to between 195 and 175 lbf.in (2.20 and 1.98 m.daN ) T
     (k) Install the block clamp (2), sleeve (4) and sleeve (7) to the insulation blanket (9) with the four bolts (1), four bushings (10) and bolt (3) fingertight.
     (l) Install the block clamp (19) to the insulation blanket (9) and the sleeve (7) with the four bolts (1), four bushings (10) and bolt (3) fingertight.
F Lower BiFi - Wiring Harness (W03 and W04) and Ignition Cables Locator ** ON A/C NOT FOR ALL
     (m) Install the bolt (3) to the bracket (20) and the block clamp (19) fingertight.
     (n) Make sure that the P05-136PMC 4273 tape, high temperature glass cloth on the ignition cables and the wiring harnesses (W03) and (W04) is between 0.75 in. (19.05 mm) and 1.25 in. (31.75 mm) from the forward and rear sides of the block clamp assembly. Remove all P05-136PMC 4273 tape, high temperature glass cloth that is not in the limits.
F Lower BiFi - Wiring Harness (W03 and W04) and Ignition Cables Locator ** ON A/C NOT FOR ALL
NOTE: Spaces that can be seen between the ignition cables and block clamp assembly sides or between the wiring harnesses (W03) and (W04) and block clamp assembly sides are not permitted.
     (o) If spaces can be seen between the ignition cables and block clamp assembly sides or between the wiring harnesses (W03) and (W04) and block clamp assembly sides then remove the ignition cables and the harnesses (W03) and (W04) from the assembly. Apply more P05-136PMC 4273 tape, high temperature glass cloth as necessary and do step 4.A.(2)(f) thru step 4.A.(2)(n) again.
     (p) Install the bracket (30) and the tube (LR02) to the bracket (20) with the two bolts (3) fingertight.
     (q) Install the tube (LB02) to the bracket (20) with the two bolts (3) fingertight.
F Lower BiFi - Wiring Harness (W03 and W04) and Ignition Cables Locator ** ON A/C NOT FOR ALL
     (r) Install the tube (LP02) to the sleeve (7) and the bracket (20) with the two bolts (3).
     (s) TORQUE the nine bolts (3) to between 100 and 90 lbf.in (1.13 and 1.02 m.daN ) T.
F Lower BiFi - Wiring Harness (W03 and W04) and Ignition Cables Locator ** ON A/C NOT FOR ALL
     (t) TORQUE the eight bolts (1) to between 100 and 90 lbf.in (1.13 and 1.02 m.daN ) T.
F Lower BiFi - Wiring Harness (W03 and W04) and Ignition Cables Locator ** ON A/C NOT FOR ALL
     (u) Install the eight bolts (1) until they touch the insulation blanket.
F Lower BiFi - Wiring Harness (W03 and W04) and Ignition Cables Locator ** ON A/C NOT FOR ALL
     (v) Tighten the eight bolts (1) one to one and one-half turns.
F Lower BiFi - Wiring Harness (W03 and W04) and Ignition Cables Locator ** ON A/C NOT FOR ALL
     (w) Safety the bolts (1) with P05-291cable, safety and P05-292ferrule, safety cable.
F Lower BiFi - Wiring Harness (W03 and W04) and Ignition Cables Locator ** ON A/C NOT FOR ALL
     (x) Apply a thin layer of P09-014PWA 36003-1 sealant, silicone rubber to the insulation blanket (9) as follows:
F Lower BiFi - Wiring Harness (W03 and W04) and Ignition Cables Locator ** ON A/C NOT FOR ALL
       1 Apply a small quantity of P09-014PWA 36003-1 sealant, silicone rubber to the left and right outboard sides of the four mating tabs.
       2 Wind the P05-191tape, electrical insulating, self-adhering, high temperature (or equivalent) around the perimeter of the insulation blanket (9) to hold the upper and lower halves together.
       3 Let the P09-014PWA 36003-1 sealant, silicone rubber to cure for 24 hours.
       4 After the P09-014PWA 36003-1 sealant, silicone rubber has cured, remove and discard the P05-191tape, electrical insulating, self-adhering, high temperature.
   (3) Examine the assembly for foreign objects, damage, and correct assembly.
5. Close-up
Subtask 72-21-11-410-050-A ** ON A/C NOT FOR ALL
A. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Close the left thrust reverser cowl-door (Ref. AMM TASK 78-36-00-410-802):
     (a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL
     (b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL.
Subtask 72-21-11-440-050-A ** ON A/C NOT FOR ALL
B. Do the reactivation of the thrust reverser system after maintenance (Ref. AMM TASK 78-30-00-440-805).
Subtask 72-21-11-410-051-A ** ON A/C NOT FOR ALL
C. Close Access
   (1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-802):
     (a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
     (b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR.
   (2) Remove the access platform(s).
   (3) Remove the WARNING NOTICE(S).
[Rev.10 from 2021] 2026.04.01 08:19:10 UTC
"Aviabrain" 2025