Airworthiness Directives; McDonnell Douglas Model DC-9-31, DC-9-32, DC-9-32F, DC-9-33F, DC-9-34, and DC-9-34F Airplanes; and Model DC-9-40 and DC-9-50 Series Airplanes
airworthiness · Rule · Final rule. · Published 2006-07-05 · Effective 2006-08-09 · 71 FR 38053
Document
Document number
06-5871
Federal Register citation
71 FR 38053
Type
Rule
Action
Final rule.
Category
airworthiness
Publication date
2006-07-05
Effective date
2006-08-09
FAA docket
Docket No. FAA-2006-24430
Abstract
The FAA is adopting a new airworthiness directive (AD) for certain transport category airplanes, identified above. This AD requires installing a bonding jumper from the boost pump volute to the fuel tank structure, and related investigative/corrective actions. This AD results from fuel system reviews conducted by the manufacturer. We are issuing this AD to prevent point-contact arcing or filament heating in the fuel tank, which, in the event of a short or ground fault inside the fuel tank, could result in a fuel tank explosion and consequent loss of the airplane.