Airworthiness directives › 2018-07-20
AD 2018-07-20 Airworthiness Directives; The Boeing Company Airplanes
Models named: MD-11, MD-11F. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to The Boeing Company Model MD-11 and MD-11F airplanes, certificated in any category, as identified in Boeing Service Bulletin MD11-28-126, Revision 6, dated July 1, 2016.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
This paragraph restates the requirements of paragraph (g) of AD 2014-03-07, with revised service information. For airplanes identified in Boeing Service Bulletin MD11-28-126, Revision 1, dated June 18, 2009: Within 60 months after February 4, 2010 (the effective date of AD 2009-26-16, Amendment 39-16155 (74 FR 69249, December 31, 2009)), do the actions specified in paragraphs (g)(1) through (g)(5) of this AD, and do all applicable corrective actions, in accordance with the Accomplishment Instructions of Boeing Service Bulletin MD11-28-126, Revision 1, dated June 18, 2009; Revision 4, dated November 29, 2011; or Revision 6, dated July 1, 2016; except as required by paragraph (k) of this AD. As of the effective date of this AD, only Boeing Service Bulletin MD11-28-126, Revision 6, dated July 1, 2016, may be used to accomplish the actions required by this paragraph. Do all applicable corrective actions before further flight. (1) Do a general visual inspection of the wire bundles between Stations 1238.950 and 1361.000 to determine if wires touch the upper surface of the center upper auxiliary fuel tank, and mark the location, as applicable. (2) Do a detailed inspection for splices and damage of all wire bundles above the center upper auxiliary fuel tank between Stations 1218.950 and 1381.000. (3) Do a detailed inspection for damage (burn marks) of the upper surface of the center upper auxiliary fuel tank. (4) Do a detailed inspection for damage (burn marks) on the fuel vapor barrier seal. (5) Install a nonmetallic barrier/shield sleeving, new clamps, new attaching hardware, and a new extruded channel.
Unsafe condition
This AD was prompted by fuel system reviews conducted by the manufacturer that indicated the need to inspect wire bundles at certain locations of the center upper auxiliary fuel tanks in addition to inspection locations required by AD 2014-03-07. We are issuing this AD to reduce the potential of ignition sources inside fuel tanks, which, in combination with flammable fuel vapors, could result in fuel tank explosions and consequent loss of the airplane.
Affected ADs
This AD replaces AD 2014-03-07, Amendment 39-17744 (79 FR 9392, February 19, 2014) (“AD 2014-03-07”).
Read the original on the Federal Register →
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1