AD NUMBER: 2007-12-10
SUBJECT: Airworthiness Directive 2007-12-10 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 of another country to
identify and correct an unsafe condition on an aviation product.
The MCAI describes the unsafe condition as: Two A330 operators have
reported uncontained APU (auxiliary power unit) generator failures
on ground. In both events, a loud noise was heard, followed by an
APU automatic shutdown. Preliminary investigations confirmed an
uncontained APU Generator failure with subsequent aircraft
structural damages to the APU compartment and, in one case, to the
stabilizer compartment. Loose APU generator parts can lead to
damage to the APU fire wall which might reduce its fire
extinguishing capability, possibly leading to a temporary
uncontrolled fire which constitutes an unsafe condition. * * * This
AD requires actions that are intended to address the unsafe
condition described in the MCAI.