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EASA issues emergency AD on A330/A340 pitot probe issues
22 September 2009

EASA issued an Emergency Airworthiness Directive (AD) regarding Airbus A330 and A340 models fitted with specific Goodrich pitot probes.
Several reports have recently been received of loose pneumatic quickdisconnect unions on Goodrich pitot probes P/N 0851HL. These may be the result of mis-torque of the affected unions at equipment manufacturing level.
Investigations are still on-going to determine the root cause(s). This condition, if not corrected, could lead to an air leak, resulting in incorrect total pressure measurement and consequent erroneous Calibrated Airspeed (CAS)/MACH parameters delivered by the Air Data Computer (ADC).
As a precautionary measure, this AD requires a torque check of the pneumatic quick-disconnect union on certain Goodrich P/N 0851HL pitot probes and corrective action, depending on findings. (EASA)

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