Airworthiness Directive · Amendment 39-14967 · McDonnell Douglas Model 717-200 Airplanes
McDonnell Douglas Model 717-200 Airplanes
This AD applies to McDonnell Douglas Model 717-200 airplanes, certificated in any category; as identified in Boeing Service Bulletin 717-28-0011, Revision 2, dated July 19, 2006.
The FAA is adopting a new airworthiness directive (AD) for certain McDonnell Douglas Model 717-200 airplanes. This AD requires replacing certain attaching hardware of the bulkhead nipple assemblies of the left and right wing vent boxes with new electrical bonding attaching hardware, doing resistance testing of the new electrical bonds, and doing fuel leakage testing of the reworked nipple assemblies. This AD results from fuel system reviews conducted by the manufacturer. We are issuing this AD to provide a conductive path, from the bulkhead nipple assemblies of the left and right wing vent boxes to the airframe structure inside the wing fuel tanks, to dissipate high- amperage lightning-induced currents, which might otherwise create an ignition source for fuel vapors inside the wing vent boxes and lead to an explosion of the fuel tanks.
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
Within 78 months after the effective date of this AD, replace certain attaching hardware of the bulkhead nipple assemblies of the left and right wing vent boxes with new electrical bonding attaching hardware, do resistance testing of the new electrical bonds, and do fuel leakage testing of the reworked nipple assemblies; in accordance with the Accomplishment Instructions of Boeing Service Bulletin 717-28-0011, Revision 2, dated July 19, 2006.
Note 1: Note (e) of Figure 1 of the service bulletin refers to a class ‘L’ resistance test. However, we have determined that the term “class ‘L’ ” is not important in this context and the directions of note (e) of Figure 1 of the service bulletin are otherwise acceptable as written.
Actions accomplished before the effective date of this AD in accordance with Boeing Service Bulletin 717-28-0011, dated April 16, 2004; or Revision 1, dated January 24, 2006; are acceptable for compliance with the corresponding actions specified in this AD.
