The relevant tasks in the trouble shooting manual did not specifically identify the pitot probe as a potential source of airspeed indication failure.
06 May 2016
Airbus modified the A330/A340 trouble shooting manual (TSM) at the OCT 01/14 Revision to introduce the following improvements:
The maintenance message "ADIRU1 (1FP1) BUS ADR" (class 1 or class 2) is now associated with the cockpit effect "NAV - ADIRS - Red SPD flag shown on CAPT PFD" to trigger the TSM task procedure 34-10-00-810-995-A. The same association has been made for the maintenance message "ADIRU2 (1FP2) BUS ADR" (class 1 or class 2) and the cockpit effect "NAV - ADIRS - Red SPD flag shown on F/O PFD"
The TSM task 34-10-00-810-995-A (Altitude or Airspeed Loss and/or Discrepancy between CAPT PFD - F/O PFD - STDBY/ISIS) now refers to the pitot probes as a possible root cause.
The ATSB notes the changes made by Airbus to the TSM and considers that the issue is adequately addressed.
Current issue status:
The actions taken significantly reduce the risk of pitot probe related problems remaining undetected during investigation of airspeed loss or discrepancy events.