Aviation safety issues and actions

Identification of pitot probe in the trouble shooting manual

Issue number: AO-2013-212-SI-01
Who it affects: Maintenance engineers
Issue owner: Airbus
Transport function: Aviation: Air transport
Background: Investigation Report AO-2013-212
Issue release date: 06 May 2016
Current issue status: Adequately addressed
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. 

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.

Proactive Action

Action number: AO-2013-212-NSA-01
Action organisation: Airbus
Date: 06 May 2016
Action status: Closed

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 comment:

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

Last update 06 May 2016