DOC AIRBUS | TSM A320FRadio Communications Become Noisy When Flying Through Cloud, Rain or Dust
TASK 23-61-00-810-801-A
Radio Communications Become Noisy When Flying Through Cloud, Rain or Dust
1. Possible Causes
2. Job Set-up Information
A. Referenced Information
3. Fault Confirmation
Subtask 23-61-00-710-050-A
Subtask 23-61-00-810-050-A
[Rev.8 from Aug 2018]
2026.04.04 04:25:47 UTC
Radio Communications Become Noisy When Flying Through Cloud, Rain or Dust
1. Possible Causes
2. Job Set-up Information
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| AMM 20-28-00-720-004 | Test of the Bonding with a GUERPILLON milliohmmeter |
| AMM 20-28-00-720-010 | Check of the Electrical Bonding of External Composite Panels with a Resistivity - Test Set |
| AMM 20-28-00-720-011 | Measurement of the Surface Electrical Resistance of External Composite Panels with a Resistivity Test Set |
| AMM 20-28-00-912-005 | Electrical Bonding of Antennas With Conductive Bolts |
| AMM 23-61-00-200-001 | Resistance Check Tip to Retainer. Bonding Check Retainer to Structure |
| NTM 511000 | |
| AMM 53-15-11-200-001 | Detailed Inspection of the Radome |
Subtask 23-61-00-710-050-A
A. Test
(1) Not applicable.
4. Fault Isolation(1) Not applicable.
NOTE: In flight, air friction causes static electricity to occur on the surface of the aircraft. The static dischargers release the static electricity charge.
The static dischargers are installed at:
The static electricity can cause two types of radio noise:
The static dischargers are installed at:
- The trailing edges and tips of the wings
- The tail of the aircraft.
- When the aircraft goes through cloud, rain or dust.
- After an aircraft repainting
- After an aircraft skin repair.
The static electricity can cause two types of radio noise:
- A continuous low frequency noise, which can occur when there is static electricity at the radome, antennas or composite panels.
- An irregular click or crackle noise, which can occur when there is static electricity at the static dischargers or metal panels.
Subtask 23-61-00-810-050-A
A. Procedure
(1) Do a check of the aircraft technical log for repair work which can be related to this fault.
(2) Do the steps that follow in an order applicable to the type of radio noise and any related repair work.
(3) Do a visual check of the applicable radio antenna and make sure that:
(9) Make an entry in the aircraft flight log to do a check (after the next flight in cloud, rain or dust) that the radio noise caused by static has decreased to a satisfactory level.
(1) Do a check of the aircraft technical log for repair work which can be related to this fault.
(2) Do the steps that follow in an order applicable to the type of radio noise and any related repair work.
(3) Do a visual check of the applicable radio antenna and make sure that:
- it is correctly bonded to the aircraft structure AMM 20-28-00-912-005
- the external paint is in good condition.
- they are not defective or missing
- they are correctly bonded to their retainers
- their retainers are correctly bonded to the aircraft structure.
- there are no missing or defective metallic strips
- the correct type of paint was used to paint the radome.
- the surface conductivity of composite panels is correct AMM 20-28-00-720-010 and AMM 20-28-00-720-011
- metal panels are correctly bonded to the aircraft structure AMM 20-28-00-720-004
- bonding leads are not missing or defective
- all panels are painted with the correct low-ohmic paint.
NOTE: If the paint is too thick, compared to the standard specified, electrostatic charges are isolated from the aircraft metal structure and may not discharge satisfactorily.
(8) Make an entry in the aircraft technical log of the work done. (9) Make an entry in the aircraft flight log to do a check (after the next flight in cloud, rain or dust) that the radio noise caused by static has decreased to a satisfactory level.