Main Wheel Well Fire Detection

A single fire detector loop is installed in the main wheel well. As the temperature of the
detector increases to a predetermined limit, the detector senses a fire condition. The
WHEEL WELL fire warning light remains illuminated until the temperature of the detector
has decreased below the onset temperature.

The indications for a main wheel well fire are:

  • The fire warning bell sounds.
  • Both master FIRE WARN lights illuminate.
  • The WHEEL WELL fire warning light illuminates.


Main Wheel Well Fire Protection
Main wheel well fire protection consists of fire detection powered by the No.1 AC Transfer
Bus.

Note: The main wheel well has no fire extinguishing system. The nose wheel well does not
have a fire detection system.