Comes on flashing with a warning annunciator.

Cabin altitude is more than 9,800 feet.

Engine fire, APU fire, or detector loop circuit malfunction is sensed.

Smoke is sensed in the forward or aft baggage compartment.

The rear outer fuselage surface has touched the runway.

RESET ONLY BY RELOADING THE Q4XP

No. 1 engine oil pressure is less than 44 psi.

No. 1 FADEC has a critical fault.

No. 2 FADEC has a critical fault.

No. 2 engine oil pressure is less than 44 psi.