AD NUMBER: 2004-16-12 MANUFACTURER: Boeing SUBJECT: Airworthiness Directive 2004-16-12 SUMMARY: This
amendment supersedes three existing airworthiness directives (AD);
applicable to certain Boeing Model 767-200, -300, and -300F series
airplanes. One AD currently requires modification of the nacelle
strut and wing structure for certain Boeing Model 767-200, -300,
and -300F series airplanes powered by Pratt & Whitney engines.
The second AD currently requires a similar modification for certain
Boeing Model 767-200, -300, and -300F series airplanes powered by
General Electric engines. The third AD currently requires
repetitive inspections for cracking of the outboard pitch load
fittings of the wing front spar, and corrective action if
necessary, for certain Boeing Model 767-200 series airplanes. The
third AD also provides a terminating action for the repetitive
inspections, which is optional for uncracked pitch load fittings.
This amendment requires, for airplanes subject to the first and
second existing ADs on which certain modifications have been
accomplished previously, reworking the aft pitch load fitting, and
installing a new diagonal brace fuse pin. This amendment also
requires, for airplanes subject to the third existing AD, replacing
the outboard pitch load fitting of the wing front spar with a new,
improved fitting,which terminates certain currently required
repetitive inspections. The actions specified by this amendment are
intended to prevent fatigue cracking in primary strut structure,
which could result in separation of the strut and engine from the
airplane. This action is intended to address the identified unsafe
condition.
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