Business & Technology | Years after fatal plane crash, fuel-tank safety still an issue | Seattle Times Newspaper
WASHINGTON — Nearly nine years after a fuel-tank explosion in a Boeing 747 caused the fatal crash of TWA Flight 800,
safety officials say little has been done to reduce the flammability of vapors in aircraft fuel tanks.
The Federal Aviation Administration announced in February 2004 that it had found a filtering system — called fuel inerting — to make fuel vapors less likely to ignite. The agency said it would propose in fall 2004 a regulation requiring that such systems be installed on Boeing and Airbus jetliners.
But no rule has been proposed yet.
National Transportation Safety Board Executive Director Dan Campbell said yesterday that while much more is known about how to prevent fuel vapors from exploding, little has been done. "We're not significantly different than we were in '96," Campbell said.
Boeing and the FAA disagree. Both point to progress in designing safer systems, which are based on an FAA prototype, as well as plans to begin producing them next year.
FAA spokesman Greg Martin said the agency has moved aggressively to eliminate the factors that can cause jet-fuel vapors to explode: sparks or flames, and a deadly combination of concentrated oxygen and fuel.
"Although a rigid formal rulemaking process takes time, we've moved aggressively to remove both ignition sources and flammability levels," Martin said.
Boeing spokeswoman Liz Verdier said aircraft manufacturers are working to reduce fuel-tank explosions even though they're extremely unusual. "They're getting more and more rare because the industry constantly works on safety," Verdier said.
Campbell acknowledged that the FAA has reduced sources of ignition that can cause fuel-vapor explosions. The FAA has ordered airlines to make more than 60 changes to eliminate potential ignition sources, such as faulty wiring.