Airworthiness Directive · Amendment 39-19251 · Fuel
The Boeing Company Airplanes
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.
We are superseding Airworthiness Directive (AD) 2014-03-07, which applied to certain The Boeing Company Model MD-11 and MD-11F airplanes. AD 2014-03-07 required inspecting certain locations of the wire bundles of the center upper auxiliary fuel tank for damage, and corrective action if necessary. AD 2014-03-07 also required installing nonmetallic barrier/shield sleeving, new clamps, new attaching hardware, and a new extruded channel. This AD adds certain inspections and expands the applicability. This AD was prompted by the determination that it is necessary to require an inspection of the wire bundles for damage at certain center upper auxiliary fuel tank locations on certain airplanes. We are issuing this AD to address the unsafe condition on these products.
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.
This paragraph restates the requirements of paragraph (h) of AD 2014-03-07, with revised service information. For airplanes in Group 1, Configuration 2; Group 2, Configuration 2; and Group 5, Configuration 2; as identified in Boeing Service Bulletin MD11-28-126, Revision 4, dated November 29, 2011: Within 60 months after March 26, 2014 (the effective date of AD 2014-03-07), do a detailed inspection of wire bundles for splices and damage (chafing, arcing, and broken insulation) and damage (burn marks) on the upper surface of the center upper auxiliary fuel tank and fuel vapor barrier seal; install barrier/shield sleeving and clamping; and do all applicable corrective actions at the applicable locations specified in paragraphs (h)(1) through (h)(3) of this AD, in accordance with the Accomplishment Instructions of Boeing Service Bulletin MD11-28-126, Revision 4, dated November 29, 2011; or Boeing Service Bulletin MD11-28-126, 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) For Group 1, Configuration 2 airplanes, between Stations 1238.950 and 1381.000, Stations 1238.950 and 1256.000, and Stations 1238.950 and 1256.800, depending on passenger or freighter configuration.
(2) For Group 2, Configuration 2 airplanes, between Stations 1238.950 and 1275.250, and Stations 1238.950 and 1275.250, passenger configuration only.
(3) For Group 5, Configuration 2 airplanes, between Stations 1381.000 and 1238.950.
For Groups 1, 2, and 5 Configuration 2 airplanes, as identified in Boeing Service Bulletin MD11-28-126, Revision 6, dated July 1, 2016: Within 60 months after the effective date of this AD, do the actions required by paragraphs (i)(1) and (i)(2) of this AD, as applicable, in accordance with the Accomplishment Instructions of Boeing Service Bulletin MD11-28-126, Revision 6, dated July 1, 2016.
(1) Do a general visual inspection of the wire bundles at the applicable center upper auxiliary fuel tank locations to determine if wires touch the upper surface of the fuel tank, and mark the location as applicable.
(2) Do a detailed inspection of the wire bundles for splices and damage on the upper surface of the center upper auxiliary fuel tank and fuel vapor barrier seal; install barrier/shield sleeving, clamping, and extruded channels, as applicable; and do all applicable corrective actions before further flight; except as required by paragraph (k) of this AD.
For airplane Line Number 579: Within 60 months after the effective date of this AD, 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 6, dated July 1, 2016, except as required by paragraph (k) of this AD. Do all applicable corrective actions before further flight.
Where Boeing Service Bulletin MD11-28-126, Revision 1, dated June 18, 2009; Boeing Service Bulletin MD11-28-126, Revision 4, dated November 29, 2011; or Boeing Service Bulletin MD11-28-126, Revision 6, dated July 1, 2016; specifies to contact The Boeing Company for repair instructions: Before further flight, repair the auxiliary fuel tank using a method approved in accordance with the procedures specified in paragraph (m) of this AD.
