Airworthiness Directive · Amendment 39-14782 · 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 717-28-0004, Revision 3, dated June 21, 2006.
The FAA is adopting a new airworthiness directive (AD) for certain McDonnell Douglas Model 717-200 airplanes. This AD requires replacing the lightning critical clamp bases of the fuel tank vent system with improved clamp bases; and checking the electrical bond of the modified self-bonding mounting clamps and corrective action if necessary. This AD results from an investigation that revealed the aluminum foil strip on the nylon base of the ground clamps can fracture or separate from the base. We are issuing this AD to ensure that the fuel pipes are properly bonded to the airplane structure. Improper bonding could prevent electrical energy from a lightning strike from dissipating to the airplane structure, which could result in a fuel tank explosion.
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 the lightning critical clamp bases of the fuel tank vent system with improved clamp bases, in accordance with Table 1 of Figure 1 of the Accomplishment Instructions of Boeing Service Bulletin 717-28-0004, Revision 3, dated June 21, 2006. Before further flight after the replacement, check the electrical bond of the modified self-bonding mounting clamps in accordance with the Accomplishment Instructions of the service bulletin. If any electrical bond fails the check, before further flight, repair the electrical bond of the mounting clamp in accordance with the service bulletin; or according to a method approved by the Manager, Los Angeles Aircraft Certification Office (ACO), FAA. Chapter 28-00-00 of the Boeing 717 Aircraft Maintenance Manual and Chapter 20-50-01 of the Boeing DC, MD, and 717 Standard Wiring Practices Manual are one approved method.
Actions done before the effective date of this AD in accordance with Boeing Service Bulletin 717-28-0004, Revision 2, dated March 11, 2005, are acceptable for compliance with the requirements of paragraph (f) of this AD.
