AD NUMBER: 2007-22-05
SUBJECT: Airworthiness Directive 2007-22-05 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: At some locations, the
new calculated fatigue life [for the wing to center box assembly]
falls below the aircraft Design Service Goal. The aim of this
Airworthiness Directive (AD) is to ensure detection of cracks on
the panels and stiffeners at ribNo. 1. This situation, if left
uncorrected, could affect the structural integrity of the area. We
are issuing this AD to require actions to correct the unsafe
condition on these products.