Airworthiness Directive · Amendment 39-17744 · Fuel
The Boeing Company Airplanes
Superseded. A later AD replaced this one: AD 2018-07-20. Comply with the one in force.
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 4, dated November 29, 2011.
We are superseding Airworthiness Directive (AD) 2009-26-16 for certain The Boeing Company Model MD-11 and MD-11F airplanes. AD 2009- 26-16 required inspecting to determine if wires touch the upper surface of the center upper auxiliary fuel tank, and marking the location, as necessary; inspecting all wire bundles above the center upper auxiliary fuel tank for splices and damage; inspecting for damage to the fuel vapor barrier seal and upper surface of the center upper auxiliary fuel tank; and performing corrective actions, as necessary. AD 2009-26-16 also required installing nonmetallic barrier/shield sleeving, new clamps, new attaching hardware, and a new extruded channel. This new AD requires inspections of additional center upper auxiliary fuel tank locations and corrective actions as necessary. This AD was prompted by reports that identified additional locations where inspections and corrective actions of the center upper auxiliary fuel tank are needed. 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.
This paragraph restates the requirements of paragraph (g) of AD 2009-26-16, Amendment 39-16155 (74 FR 69249, December 31, 2009), 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), 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; or Boeing Service Bulletin MD11-28-126, Revision 4, dated November 29, 2011; except as required by paragraph (j) of this AD. After the effective date of this AD, only Boeing Service Bulletin MD11-28-126, Revision 4, dated November 29, 2011, may be used. 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.
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 the effective date of this AD, 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 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, except as required by paragraph (j) of this AD. 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.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
Aircraft
