AD NUMBER: 2008-02-02
SUBJECT: Airworthiness Directive 2008-02-02 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 that
the implementation of the Inertial Reference Units (IRU) on the
ERJ-170 [and ERJ-190] may lead, in certain degraded modes, toan
erroneous Flight Path Angle (FPA) indication on both Primary Flight
Displays, with no alert to the flight crew. On the ERJ-170 [and
ERJ-190], FPA is considered as important as pitch and bank angle
for piloting purposes. The unsafe condition is reduced ability of
the flightcrew to control the flight path of the airplane. We are
issuing this AD to require actions to correct the unsafe condition
on these products.