Yamaha RMAX Type II G Unit Operation Manual page 36

Pre-Flight Inspection Items
G Poor GPS Reception (Outer Lights of GPS
Indicator Light Are OFF)
1 In the event of radio signal interference, the inner
and outer lights of the red YACS warning lights
will flash alternately and the system will force the
helicopter to descend quickly regardless of the
flight mode. If the control radio signals recover
while the helicopter is descending, the flight
mode will switch automatically to operator con-
trol. For this reason, calmly move all the sticks
on the transmitter to the neutral (center) position,
and wait for the signals to recover.
2 If the helicopter is forced to land because the
radio signals have not recovered, the engine is
brought to idle.
Depending on the terrain, weather, and flight
conditions, the helicopter could overturn. If the
helicopter overturns, never approach the heli-
copter, as the engine speed might not decrease.
3 After a forced landing, turn the throttle to the
slowest position and wait for the radio signals to
recover or the engine to stop.
4 If the radio signals do not recover after 1 minute
from the time the radio signal interference
occurred, the engine will stop automatically. After
the rotor has come to a complete stop, approach
the helicopter and turn OFF its main switch.
3-13
Descends quickly
Radio signal interference!
(Inner and outer YACS warning
lights flash alternately.)