W DOC AIRBUS | AMM A320F

Detailed Inspection of Bonding Leads on Access Panels, Doors and Movable Surfaces

TASK 20-28-00-200-001-A
Detailed Inspection of Bonding Leads on Access Panels, Doors and Movable Surfaces

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
1. Reason for the Job
Self 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 -
 B. Referenced Information
REFERENCE
DESIGNATION
TASK 20-28-00-869-002-A
Table of the Maximum Permitted Resistance-Values
TASK 20-28-00-912-802-A
Electrical Bonding - General Maintenance Procedure
TASK 24-92-00-210-024-A
Detailed Inspection of Bonding Leads Located on the Following Movable Surfaces: Elevator, Rudder, Flaps, Flap Track Fairings, Slats, Spoilers, Ailerons,.......
3. Job Set-up
Subtask 20-28-00-110-105-A
A. Cleaning of the Structure
   (1) Clean the inspection areas with Non Aqueous Cleaner-General - - (Material No.08BAA9) and a lint-free cotton cloth Textile-Lint free Cotton - (Material No.14SBA1) , if necessary.
4. Procedure
Subtask 20-28-00-220-054-A
A. Inspection
   (1) Do a detailed inspection of the bonding leads installed on the access panels, doors and movable surfaces.
   (2) For bonding leads installed on the servicing doors or access panels:
  • Replace the bonding lead at the next maintenance visit, before 6 months, 1000 Flight Hours (FH) or 1000 flight cycles, whichever occurs first if the bonding lead is broken or if more than 25% of the strands are damaged (less than 75% not damaged) (Ref. AMM TASK 20-28-00-912-802).
NOTE: Because it is not possible to know with precision the number of damaged strands when a bonding lead is damaged: 25 per cent is equal to 1/4 of the cross section (for example, 3.25 mm2 (0.01 in.2) for a cross section of 13 mm2 (0.02 in.2) or 1.75 mm2 (0.00 in.2) for a cross section of 7 mm2 (0.01 in.2)).
   (3) For bonding leads installed on the cargo doors
     (a) During the inspection, it is recommended to replace all bonding leads that are broken or if more than 25 % of the strands are damaged (less than 75% not damaged) (Ref. AMM TASK 20-28-00-912-802).
NOTE: Because it is not possible to know with precision the number of damaged strands when a bonding lead is damaged: 25 per cent is equal to 1/4 of the cross section (for example, 3.25 mm2 (0.01 in.2) for a cross section of 13 mm2 (0.02 in.2) or 1.75 mm2 (0.00 in.2) for a cross section of 7 mm2 (0.01 in.2)).
     (b) If the operator cannot replace all the bonding leads before the scheduled aircraft release:
       1 Measure the maximum permitted resistance value between the attachments of the damaged bonding lead.
       2 Refer to the table to find the correct value (Ref. AMM TASK 20-28-00-869-002)
  • If the measured resistance value is less than the table resistance value, you can replace this bonding lead at the next maintenance visit, before 6 months, 1000 FH or 1000 flight cycles, whichever occurs first.
  • If the measured resistance value is more than the table resistance value and if there are no other parallel leads, replace the damaged bonding lead.
NOTE: For the bonding leads installed on the forward and aft cargo-door piano-hinges, we recommend that you remove the damaged bonding lead without replacement.
   (4) For bonding leads installed on:
  • The flaps,
  • The flap track fairings,
  • The slats,
  • The spoilers,
  • The ailerons,
  • The NLG doors,
  • The MLG doors,
  • The passenger/crew doors,
  • The elevators and
  • The rudder.
    Do a detailed inspection of the bonding leads installed on the movable surfaces (Ref. AMM TASK 24-92-00-210-024).
[Rev.10 from 2021] 2026.03.31 23:00:22 UTC
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