NPRM, Boeing 757 airplanes

Wednesday, 12 December 2007
9 November 2007 FR Doc E7-22009 - Docket No. FAA-2007-0175 FAA FAA requires changing the wiring of the fuel boost pump. As the FAA says: “We have received reports indicating that short circuits occurred in an electrical connector at the wing-to-body electrical disconnect panel on three Boeing model 757 airplanes.… A short circuit can put a high-energy electrical transient into the fuel tanks that can act as a potential ignition source. The high-energy electrical transients could also cause the instruments for the fuel, flap, slat, and aileron systems to malfunction. A potential ignition source inside the fuel tank in combination with flammable fuel vapors, if not corrected, could result in a fuel tank explosion and consequent loss of the airplane.” Again, the TWA 800 scenario rears its ugly head. Action affects 1,697 airplanes worldwide, of which 673 are in U.S. registry. Corrective action is estimated to cost $960 per airplane. Comments due 24 December.
Last Updated ( Wednesday, 12 December 2007 )

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