DOC AIRBUS | AMM A320FReplacement of Damaged Tube Nuts and Thrust Wires [PW11]
TASK 70-24-00-910-805-A
Replacement of Damaged Tube Nuts and Thrust Wires
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Referenced Information
3. Job Set-up
Subtask 70-24-00-860-054-A ** ON A/C NOT FOR ALL
Subtask 70-24-00-910-053-A ** ON A/C NOT FOR ALL
(2) Cover all the openings to protect them from foreign objects.
(3) Put a temporary PLUG - BLANKING plug in the tube ferrule or fitting to keep machining chips and dirt out of the tube.
(4) If you damage a tube which is captured in the engine cases, it will be necessary to remove the engine for tube replacement.
(5) Follow the instructions in the subsequent paragraph for the removal of the thrust wire.
(6) Installation of the new thrust wire
Subtask 70-24-00-020-050-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.02 06:31:41 UTC
Replacement of Damaged Tube Nuts and Thrust Wires
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
1. Reason for the JobNOTE: Always obey the specific procedures and limits given in the specific maintenance manual tasks.
2. Job Set-up InformationA. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | LIGHT SOURCE - HIGHPOWER |
| No specific | AR | PLUG - BLANKING |
| PWA21411 | 1 | ANVIL - TUBE NUT THRUST WIRE |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.P03-001) | lubricant, aircraft turbine engine |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 70-24-00-910-811-A | Assembly - PWA 316 - Safety Wire (Lockwire) Installation |
| TASK 70-24-00-910-813-A | Assembly - PWA 316 - Safety Cable Installation |
Thrust Wire ReplacementSubtask 70-24-00-860-054-A ** ON A/C NOT FOR ALL
A. Not Applicable
4. ProcedureSubtask 70-24-00-910-053-A ** ON A/C NOT FOR ALL
CAUTION:
INSTALL PROTECTION COVERS ON ALL THE OPENINGS IMMEDIATELY TO PREVENT DAMAGE TO THE ENGINE.
CAUTION:
BE CAREFUL NOT TO CAUSE DAMAGE TO THE TUBE ATTACHED INSIDE THE ENGINE CASES. IF YOU DO, IT WILL BE NECESSARY TO REMOVE THE ENGINE.
A. General Instructions for the Tubes Attached inside the Engine Cases NOTE: The subsequent steps must only be done by an experienced operator.
(1) Disconnect the mating tube from the damaged tube nut. (2) Cover all the openings to protect them from foreign objects.
(3) Put a temporary PLUG - BLANKING plug in the tube ferrule or fitting to keep machining chips and dirt out of the tube.
(4) If you damage a tube which is captured in the engine cases, it will be necessary to remove the engine for tube replacement.
(5) Follow the instructions in the subsequent paragraph for the removal of the thrust wire.
(6) Installation of the new thrust wire
CAUTION:
BEFORE YOU INSTALL THE NEW THRUST WIRE INTO THE NEW TUBE NUT, YOU MUST SUPPORT THE TUBE NUT WITH AN OPPOSITE FORCE. IF THE TUBE NUT IS NOT SUPPORTED, DAMAGE TO THE TUBE CAN OCCUR.
(a) When you install the new thrust wire into the new tube nut, you must support the tube nut with an opposite force. B. Removal of the Damaged Tube Nut and Thrust Wire
(2) Put a temporary PLUG - BLANKING in the tube ferrule or fitting to keep machining chips and dirt out of the tube.
(3) To remove the thrust wire from the nut, hold the drilled end and pull the wire out of the nut.
(5) If the thrust wire is damaged or too tight, it will be necessary to cut the nut off of the tube end as follows:
(b) Use a high-speed cut-off wheel to cut around the nut a small distance outboard of the thrust wire, until the wire area is open.
(c) Remove the thrust wire and nut from the tube.
(d) Discard the thrust wire.
(6) Examine the tube end for any damage.
Subtask 70-24-00-420-050-A ** ON A/C NOT FOR ALL NOTE: The instructions in this paragraph apply to damaged tubes which have been removed from the engine. If the tube being repaired is attached inside the engine cases, you must obey the precautions in the previous paragraph.
(1) If possible, remove the damaged tube from the engine. (2) Put a temporary PLUG - BLANKING in the tube ferrule or fitting to keep machining chips and dirt out of the tube.
(3) To remove the thrust wire from the nut, hold the drilled end and pull the wire out of the nut.
NOTE: For tubes with a plain thrust wire, you can pull either end of the thrust wire out of the nut.
(4) Discard the thrust wire. (5) If the thrust wire is damaged or too tight, it will be necessary to cut the nut off of the tube end as follows:
CAUTION:
WHEN YOU USE THE CUT-OFF WHEEL, BE CAREFUL NOT TO CAUSE DAMAGE TO THE FERRULE OR FITTING ON THE TUBE.
(a) Support the tube nut on a hard work surface or in a soft-jawed vise. (b) Use a high-speed cut-off wheel to cut around the nut a small distance outboard of the thrust wire, until the wire area is open.
(c) Remove the thrust wire and nut from the tube.
(d) Discard the thrust wire.
(6) Examine the tube end for any damage.
C. Installation of the New Tube Nut and the New Thrust Wire
(1) Always use a new thrust wire for each installation.
(2) Put the new nut in position on the end of the tube ferrule or fitting.
(3) Apply a small amount ofP03-001 lubricant, aircraft turbine engine
(4) While you install the new thrust wire, hold the tube nut as follows:
(a) For tubes removed from the engine, support the new tube nut on a bench or in a soft-jawed vise.
(b) For tubes captured inside the engine cases, support the tube nut with an opposite force.
(5) Before you push the thrust wire into position, make sure that the thrust wire is aligned with the rear radius of the tube ferrule or fitting. Use a LIGHT SOURCE - HIGHPOWER or a small test wire to make sure that the wire hole in the nut will let the thrust wire go against (but not into) the radius on the ferrule or fitting.
(6) With the new tube nut in position on the end of the tube, put the new thrust wire into position.
(7) If the thrust wire goes into the hole easily, tap the thrust wire into position with a brass (or other non-ferrous) mallet.
(8) If you cannot easily push the thrust wire into the hole, examine the alignment again.
(9) Push the thrust wire into position.
(10) Make sure that the thrust wire comes out of the other side of the nut and is fully installed.
(11) Make sure the nut is held on the tube and can turn smoothly.
(12) Remove the plug from the tube.
(13) Examine the tube end for any damage or blockage.
(14) Safety the thrust wire.
(15) Install or connect the tubes as necessary.
(1) Always use a new thrust wire for each installation.
(2) Put the new nut in position on the end of the tube ferrule or fitting.
(3) Apply a small amount of
(4) While you install the new thrust wire, hold the tube nut as follows:
(a) For tubes removed from the engine, support the new tube nut on a bench or in a soft-jawed vise.
(b) For tubes captured inside the engine cases, support the tube nut with an opposite force.
(5) Before you push the thrust wire into position, make sure that the thrust wire is aligned with the rear radius of the tube ferrule or fitting. Use a LIGHT SOURCE - HIGHPOWER or a small test wire to make sure that the wire hole in the nut will let the thrust wire go against (but not into) the radius on the ferrule or fitting.
(6) With the new tube nut in position on the end of the tube, put the new thrust wire into position.
(7) If the thrust wire goes into the hole easily, tap the thrust wire into position with a brass (or other non-ferrous) mallet.
(8) If you cannot easily push the thrust wire into the hole, examine the alignment again.
(9) Push the thrust wire into position.
CAUTION:
WHEN YOU USE AN AIR HAMMER, BE CAREFUL NOT TO BEND THE THRUST WIRE AND NOT TO PUSH IT AGAINST THE TUBE FERRULE OR FITTING.
(a) If the alignment is good, use a Bantam Bully Air Hammer and a PWA21411 ANVIL - TUBE NUT THRUST WIRE to push the thrust wire into position. (10) Make sure that the thrust wire comes out of the other side of the nut and is fully installed.
(11) Make sure the nut is held on the tube and can turn smoothly.
(12) Remove the plug from the tube.
(13) Examine the tube end for any damage or blockage.
(14) Safety the thrust wire.
WARNING:
USE 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.
(a) If applicable, safety the thrust wire with safety wire. Refer to the Installation of Safety Wire (Ref. AMM TASK 70-24-00-910-811) or the Installation of Safety Cable (Ref. AMM TASK 70-24-00-910-813) and the specific AMM maintenance task for safety procedures. (15) Install or connect the tubes as necessary.