AD NUMBER: 2006-19-12
SUBJECT: Airworthiness Directive 2006-19-12 SUMMARY: The
FAA is adopting a new airworthiness directive (AD) for certain
Boeing Model 777-200 and -300 series airplanes. This AD requires
inspecting the lower web of the aft fairing of engine struts for
any discoloration and doing any related investigative and
corrective action if necessary; inspecting the heat shield castings
for any damage and doing any corrective action if necessary;
installing gap cover strips; and replacing insulation blankets with
new insulation blankets.
This AD results from a report that several discolored fairing
lower webs and some damaged/deteriorated insulation blankets were
found in the aft fairings of engine struts.
We are issuing this AD to prevent cracking of lower webs of the
aft fairings, which could result in flammable hydraulic fluid
leaking onto or near an ignition source, and possibly result in an
uncontrollable fire in the engine strut area.