We propose to rescind an existing airworthiness directive (AD) that applies to certain The Boeing Company Model 767-200, -300, -300F, and -400ER series airplanes. The existing AD currently requires an inspection to determine if certain motor operated valve actuators for the fuel tanks are installed, and related investigative and corrective actions if necessary. We issued that AD to prevent an ignition source inside the fuel tanks, which, in combination with flammable fuel vapors, could result in a fuel tank explosion and consequent loss of the airplane. Since we issued that AD, we have received new data indicating that the existing AD addresses that safety concern, but also introduces a different unsafe condition.
Agency Contact: Rebel Nichols, Aerospace Engineer, Propulsion Branch, ANM-140S, FAA, Seattle Aircraft Certification Office, 1601 Lind Avenue SW., Renton, WA 98057-3356; phone: (425) 917- 6509; fax: (425) 917-6590; email: Rebel.Nichols@faa.gov.
This is a proposed regulation. Comments were due on September 24, 2012.