Airworthiness Directives; The Boeing Company Airplanes
airworthiness · Rule · Final rule. · Published 2019-12-31 · Effective 2020-02-04 · 84 FR 72227
Document
Document number
2019-27885
Federal Register citation
84 FR 72227
Type
Rule
Action
Final rule.
Category
airworthiness
Manufacturer
The Boeing Company
Publication date
2019-12-31
Effective date
2020-02-04
FAA docket
Docket No. FAA-2016-9072
Abstract
The FAA is adopting a new airworthiness directive (AD) for certain The Boeing Company Model 727 airplanes. This AD was prompted by the FAA's analysis of the Model 727 fuel system review conducted by the manufacturer. This AD requires modifying the fuel quantity indicating system (FQIS) to prevent development of an ignition source inside the body-mounted auxiliary fuel tanks due to electrical fault conditions. As an alternative to the modification, this AD allows deactivating the body-mounted auxiliary fuel tanks. The FAA is issuing this AD to address the unsafe condition on these products.