AD NUMBER: 2008-13-10
SUBJECT: Airworthiness Directive 2008-13-10 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 ofanother country to
identify and correct an unsafe condition on an aviation product.
The MCAI describes the unsafe condition as: Investigation following
incidents on the production line has shown that power feeders
inside the Secondary Power Distribution Boxes (SPDB) may be damaged
because of interference with other internal parts. This condition,
if not corrected, may lead to losing essential feeders. The
resulting power shortage may reduce aircraft operability and affect
flight safety margins. Damaged secondary power distribution boxes
could lead to loss of electrical power resulting in
depressurization with loss of passenger oxygen supply and
uncommanded slat retraction. This AD requires actions that are
intended to address the unsafe condition described in the MCAI.