Hi,
Turbine D
Ref
PJ2
and not at cruise altitude which didn't require any action at all as the "safe conduct of the flight" was not in question
What is "unsafe condition"
The definition of "unsafe condition" is given in the AMC 21 A 3b (b):
a) event likely to cause victims, usually with the destruction of
plane or likely to reduce the capacity of the aircraft or crew to manage
degraded conditions that lead to:
A significant reduction in safety margins or functional capabilities;
Physical distress or excessive workload which no longer allows
crew to perform its tasks accurately or to complete them;
The occurrence of death or serious injury to at least one occupant of the aircraft.
Unless it is shown that the probability of this event is within the limits defined
by certification standards.
Note: The equipment must operate an aircraft throughout its flight and admits that
there can be failures whose probability does not exceed a threshold defined by the
severity of the risk (minor, major, hazardous, catastrophic). In the case of blockage of the Pitot probes, it
may be withheld probability of occurrence because it is not a failure but a failure. the
manufacturer and the regulator have the obligation to eliminate all the defects of an aircraft.
September 8, 2009: The FAA conducts emergency disposal of the AA Pitot probe
AD 2009-18-08 (Appendix 49) stating that it is the response to an "unsafe
condition "(In the document 14 CFR part 39.5, the FAA states that" airworthiness
Directive "is published in response to an" unsafe condition ") to eliminate all the defects of an aircraft.
The European Aviation Safety Agency (EASA), which is the Technical Agent for the
Member States of the European Community, has issued a Notification of a Proposal to
Issue an Airworthiness Directive (PAD), PAD 09‐099, dated August 10, 2009 (referred to
after this as “the EASA PAD”), to correct an unsafe condition for certain Airbus Model
A330‐200 and ‐300 series airplanes, Model A340‐200 and ‐300 series airplanes, and
Model A340‐541 and ‐642 airplanes.
“ we have reviewed the numerous airspeed anomalies recently reported on Model
A330 and A340 airplanes. Based on our review, we have determined that an unsafe
condition exists and immediate airworthiness action for the Model A330 and A340 fleet
is warranted.”
Because an unsafe condition exists that requires the immediate adoption of this AD, we
find that notice and opportunity for prior public comment hereon are impracticable and
that good cause exists for making this amendment effective in less than 30 days.