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Identification of pitot probe in the trouble shooting manual
Date issue released
Issue number
AO-2013-212-SI-01
Transport Function
Aviation: Air transport
Issue Owner
Airbus
Mode of Transport
Aviation
Safety Issue Description

The relevant tasks in the trouble shooting manual did not specifically identify the pitot probe as a potential source of airspeed indication failure.

Issue Status Justification

The actions taken significantly reduce the risk of pitot probe related problems remaining undetected during investigation of airspeed loss or discrepancy events. 

Proactive action
Action number
AO-2013-212-NSA-01
Organisation
Airbus
Action date
Action Status
Closed
Action description

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.
ATSB Response

The ATSB notes the changes made by Airbus to the TSM and considers that the issue is adequately addressed.