Radar altimeter (KRA 405) - Check as follows:
Decision height knob (radar altimeter)
- Adjust for height of 25 feet (shown
by DH bug).
Press TEST pushbutton - Observe
warning flag comes into view and DH
indicator is not lit.
DH knob - Slowly adjust until
DH indicators light (TEST pushbutton
must still be depressed). Observe
DH bug is at 50 ± feet.
TEST pushbutton - Release. Observe
that warning flag retracts from view
and indicates altitude is 0 feet,
Strong radar reflections from nearby
objects may cause radar altimeter
indicator needle to remain in view. This
does not indicate a radar altimeter
Fuel panel - Check switches and circuit breakers set.