The hydraulic system warning HYDR II will light up momentarily if you make large stick movements when the engine is running at ground idle. This is normal and only indicates that hydraulic pressure is insufficient to deflect the elevons fully. The EPU will also be extended momentarily while this warning light is lit.
The fuel pump warning TANKP will be lit when AC power is off, unless fuel is provided from the drop tanks (drop tanks fuelled and valves open). In that case, fuel pressure will be sufficient even without the fuel pump.
The afterburner warning light EBK indicates afterburner malfunction
but is also lit when the exhaust nozzle
eyelids are changing position, and when the
nozzle overheating protection system (RAT) is active. It does not indicate that the afterburner is active..
The STYRAUT warning light indicates autopilot failure. It will also be lit if you switch off the autopilot main switch, or when you override the autopilot.
The Master Warning Light (red) will blink if any of the other warning lights are lit, with some exceptions:
The Engine Deice indicator light (MOTOR IS) will not trigger a Master Warning.
The EBK warning light will only trigger a Master Warning if it is caused by an afterburner malfunction.
When the emergency bus is switched on, the Electrical Failure (ELFEL) warning will still be lit, but the Master Warning will disappear.
The Fuel System (TANK LUFT) warning sometimes lights up for a few seconds when the system switches from external to main fuel tanks. This will not cause a Master Warning.
The Gear Warning Light (orange) blinks while the main gear is being extended or retracted. It will also blink if throttle is reduced at low altitude with the gear not extended. See also Landing gear.
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