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Old 19th Jun 2007, 08:57
  #35 (permalink)  
Fat Dog
 
Join Date: Jan 2002
Location: UK
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The fire bell is never inhibited automatically on any aircraft that I know of. It can be inhibited by the crew, but other visual warnings remain.
Actually Old Smokey not quite true.

B757 Operations Manual:

'Warning Inhibits

The Master WARNING lights and fire bell are inhibited for fire during part of the
takeoff. The inhibit begins at rotation and continues until the first to occur:

• 400 feet AGL, or
• 20 seconds elapsed time

If a fire occurs during the inhibit, an EICAS warning message appears, but the fire bell and Master WARNING lights do not activate. If the warning condition still exists when the inhibit is removed, the fire bell and Master WARNING lights activate immediately.'
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