DOC AIRBUS | AMM A320FPermitted Damage and Defects on Flexible Hydraulic Hoses
TASK 20-23-11-200-003-A
Permitted Damage and Defects on Flexible Hydraulic Hoses
Self explanatory
2. Job Set-up Information
A. Consumable Materials
B. Referenced Information
3. Job Set-up
Subtask 20-23-11-869-059-A
Subtask 20-23-11-210-063-A
[Rev.10 from 2021]
2026.03.31 22:59:25 UTC
Permitted Damage and Defects on Flexible Hydraulic Hoses
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Consumable Materials
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.08BAA9) | Non Aqueous Cleaner-General - - |
| (Material No.14SBA1) | Textile-Lint free Cotton - |
| REFERENCE | DESIGNATION |
|---|---|
Permitted Damage and Defects on Flexible HosesSubtask 20-23-11-869-059-A
A. Not Applicable
4. ProcedureSubtask 20-23-11-210-063-A
A. Permitted Damage and Defects on Flexible Hydraulic Hoses
2 Visually examine the hose, conduits and fittings to find chafing marks on the hose surface, cuts or kinking or other types of damage.
a Replace the flexible hose if:
NOTE: This procedure is not applicable to the flexible hoses in the engine area. You can refer to the engine manufacturer's instructions for repairs of the flexible hoses in the engine area.
(1) Permitted damage and defects NOTE: When the damage or defects on the flexible hoses are more than the permitted limits given below, we recommend you to replace the flexible hoses.
(a) Permitted limits for signs of impact and surface defects NOTE: Surface defects are discontinuities such as:
1 Use Non Aqueous Cleaner-General - - (Material No.08BAA9) and Textile-Lint free Cotton - (Material No.14SBA1) to clean the flexible hose. - Nicks
- Scratches
- Cracks and forging laps
- Scores
- Bends
- Corrosion pits.
2 Visually examine the hose, conduits and fittings to find chafing marks on the hose surface, cuts or kinking or other types of damage.
a Replace the flexible hose if:
- There is a surface defect with signs of dents, kinks or deformation.
- Two or more wires in one plait or a number of wires are broken in one small area.
- The metal braid hose has wear or chafing on the metal braid that is more than the maximum permitted wear damage (see formula).
- The hose has a fire sleeve protection (brown neoprene overlay-protection) and there is wear or chafing on the fire sleeve protection.
- The hose has a chafe guard protection (blue color) and the wear or chafing on the metal braid is more than the maximum permitted wear damage (see formula).
- Find and remove the root cause of chafing before the next flight.
- Replace the flexible hose if the wear width is more than 10% of the hose circumference:
Measure the width of the wear (W) and the external diameter of the hose (D).
If W x 100 / D x 3.14 > 10, replace the flexible hose.
NOTE: It is necessary to measure the hose diameter (D) on a straight area immediately after the socket.
The thickness of the chafe guard (if installed) is subtracted to find the braid external diameter (D).
The thickness of the chafe guard (if installed) is subtracted to find the braid external diameter (D).
NOTE: The thickness of the chafe guard on the hose is not included in the given formula.
If the chafe guard is damaged, it is not necessary to replace the hose immediately. But Airbus recommends that you replace it at the next maintenance opportunity.
If the chafe guard is damaged, it is not necessary to replace the hose immediately. But Airbus recommends that you replace it at the next maintenance opportunity.