Sorry to come back quite lately on a matter that was raised pages ago.
I just needed to access some resources to recover data.
- EASA AD F-2002-586R01 requires all Thales Avionics pitot probes P/N C16195AA with S/N lower than 4760 to be inspected to detect the presence of burr that may block the drain holes and as a consequence obstruct the air intake of the probe. After S/N 4761, Thales Avionics has performed the cleaning of the drain hole during the manufacturing process.
This AD refers Airbus SB A320-34-1263 and Thales Avionics VSB C16195A-34-002.
- SB A320-34-1354 (first published in March 2006) proposes to change Thales Avionics pitot probes P/N C16195AA by pitot probes P/N C16195BA .
QUOTE- REASON/DESCRIPTION/OPERATIONAL CONSEQUENCES Operators have reported airspeed discrepancies while flying under heavy precipitations or in freezing weather conditions. In such an icy and turbulent atmosphere, the aircraft air data parameters may be severely degraded, even though the probe heaters work properly. It appears that the characteristics of such an environment could exceed the weather specifications for which the pitot probes are currently certified. This Service Bulletin replaces the existing pitot probes (FINs 9DA1, 9DA2 and 9DA3) by new probes which are mechanically and electrically interchangeable. Accomplishment of Service Bulletin will improve the resistance against water ingress under severe conditions resulting in improved airspeed behavior. In addition, this new pitot probe introduces a new external protection layer to prevent corrosion.
UNQUOTE - SB A330-34-3071 (first published in September 2007) proposes to change Thales Avionics pitot probes P/N C16195AA by pitot probes P/N C16195BA.
QUOTE- REASON/DESCRIPTION/OPERATIONAL CONSEQUENCES A320 aircraft family operators have reported airspeed discrepancies while flying under heavy precipitations. A new Pitot probe has been designed to improve A320 aircraft airspeed behavior with these specific weather conditions. A few similar discrepancies had also been reported by A330/A340 aircraft operators and AIRBUS now proposes this Pitot probes improvement for Long Range (LR) aircraft. This Service Bulletin proposes the replacement of the three Pitot probes PN C16195AA (FINs 9DA1, 9DA2 and 9DA3) by new probes PN C16195BA. Accomplishment of this Service Bulletin will improve the resistance against water ingress under severe conditions resulting in improved airspeed behavior. In addition, this new Pitot probe introduces a new external protection layer to prevent corrosion.
UNQUOTE
Please note that both of these SBs are RECOMMENDED only, meaning that it's up to the operators to decide upon the embodiement on their fleets.
To conclude, P/N C16195 has been improved by Thales Avionics to cope with some minor (because no AD was raised to cover those two SBs) in-service issues.
Therefore, the various retrofit campains that have been mentioned in the previous pages are led on a volontary basis by the operators.
- No TFU on A330 airspeed discrepancies has been published by Airbus meaning that, even if some incidents have occured (see Air Caraïbes above), it was not on a widespread basis and/or no major safety issue was identified.
Hope this clarifies.