AD NUMBER: 2009-06-16
SUBJECT: Airworthiness Directive 2009-06-16 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: It has been found the
occurrence of failed bearings of the RAT [ram air turbine]
generator, which may lead to a RAT generator failure. The RAT
generator was designed to provide emergency electrical power to
essential systems in case of loss of all other sources of aircraft
AC electrical power. * * * * * Loss of emergency electrical power
could result in reduced controllability of the airplane during
in-flight emergencies. We are issuing this AD to require actions to
correct the unsafe condition on these products.