Air Transport World

Boeing tests fuel tank inerting system.(Brief Article)

Boeing expected to complete testing this month of a fuel tank inerting system that it hopes to have certificated in early 2005 for initial use in the two models most prone to center fuel tank explosions, the 737 and 747. The system will weigh about 140 lb. on a 737 and 250 lb. on a 747, the company believes. The manufacturer also applied for certification of the Flammability Reduction System on the 757, 767 and 777. Evaluation of the FRS on a 747-400 flying testbed began in late July.

The FRS takes engine bleed air through a nitrogen generation system developed by Honeywell that cools the air and reduces the amount of oxygen in the flow to below 12%, then feeds that into the rank. …

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