Wed, Nov 02, 2011
AD NUMBER: 2011-21-51
MANUFACTURER: Cessna Aircraft Company 525
SUBJECT: Airworthiness Directive 2011-21-51
ACTION: Final rule; request for comments.
SUMMARY: The FAA is are adopting a new
airworthiness directive (AD) for certain Cessna Aircraft Company
(Cessna) Model 525C airplanes. This emergency AD was sent
previously to all known U.S. owners and operators of these
airplanes. This AD requires replacing certain lithium-ion batteries
installed as the main aircraft battery with either a Ni-Cad or a
lead acid battery.
This AD was prompted by a report of a battery fire that resulted
after an energized ground power unit was connected to one of the
affected airplanes equipped with a lithium-ion battery as the main
aircraft battery. The FAA is issuing this AD to correct the unsafe
condition on these products.
DATES: This AD is effective November 1, 2011 to
all persons except those persons to whom it was made immediately
effective by Emergency AD 2011-21-51, issued on October 6, 2011,
which contained the requirements of this amendment.
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