Tue, Jan 08, 2008
AD NUMBER: 2007-26-17
SUBJECT: Airworthiness Directive 2007-26-17
SUMMARY: The FAA is
superseding an existing airworthiness directive (AD), which applies
to certain Boeing Model 747-200B, 747-200C, 747-200F, 747-300,
747-400, and 747SP series airplanes.
That AD currently requires doing a detailed inspection of the
left and right longeron extension fittings, and corrective action
if necessary. This new AD adds airplanes to the applicability of
the existing AD.
This AD results from reports that accidental drilling damage to
the longeron extension fittings was found on airplanes not subject
to the existing AD.
We are issuing this AD to detect and correct accidental drilling
damage of the longeron extension fittings, which could lead to
cracking of the longeron extension fittings and result in rapid
decompression of the airplane.
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