MANUFACTURER: Construcciones Aeronauticas, S.A.
(CASA), Model C-212-CB, C-212-CC, C-212-CD, C-212-CE, C-212-CF, and
C- 212-DE Airplanes SUBJECT: Airworthiness Directive 2009-12-04
SUMMARY: We are adopting a new airworthiness
directive (AD) for the products listed above. This AD results from
mandatory continuing airworthiness information (MCAI) originated by
an aviation authority of another country to identify and correct an
unsafe condition on an aviation product. The MCAI describes the
unsafe condition as:
Incidents have been reported on Britten-Norman BN-2 aircraft,
where cracks were found in the inner shell of the pitot/static
pressure heads. The investigation concluded that these pitot tubes,
supplied by Thales Optronics, could be operated outside their
voltage specification. On December 15th, 2005, CAA [Civil Aviation
Authority] United Kingdom issued AD G-2005-0034 (EASA approval
number 2005-6447), later superseded by EASA AD 2006-0143, to
require inspections and leak tests on Britten-Norman aircraft.
Subsequently, it has been discovered that the same tubes are
supplied to EADS-CASA for installation on C-212 aircraft, one for
the pilot side and one for the co-pilot side. So far, EADS-CASA has
not received any report of cracked pitot tubes from C-212
operators.
This condition, if not corrected, could result in incorrect
readings on the pressure instrumentation, e.g., altimeters,
vertical speed indicators (rate of climb) and airspeed indicators,
potentially leading to navigational errors.
The unsafe condition could reduce the ability of the flightcrew
to maintain the safe flight and landing of the airplane. We are
issuing this AD to require actions to correct the unsafe condition
on these products.
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