National Transportation Safety Board investigators have questioned whether an electrical discharge in the Fuel Quantity Indication System (FQIS) may have initiated the TWA-800 center wing tank explosion. Because the FQIS was designed to be incapable of producing such a discharge on its own, attention has been directed to mechanisms of outside electromagnetic influence. To support the investigation, the NASA Langley Research Center was tasked to study the potential for radiated electromagnetic fields from external radio frequency (RF) transmitters and passenger carried portable electronic devices (PEDs) to excite the FQIS enough to cause arcing, sparking or excessive heating within the fuel tank.This practice was evident throughout the CWTs of the retired B-747-100 airplanes observed in New Mexico, and was presumed to be similar to the wiring practice within the TWA-800 CWT. Because RF signals are harmonically based, theyanbsp;...
|Title||:||Investigation of Electromagnetic Field Threat to Fuel Tank Wiring of a Transport Aircraft|
|Author||:||Jay J. Ely|