DOOR NOT LOCKED (DOOR NOT LOCKED CAUTION LIGHT ON AND MASTER CAUTION)
Indicates unlocked (key) nose or tailcone doors, failure or improper position of one or more door switches, and/or possible disengagement of the lower forward cabin door pin.
ON THE GROUND
1. Correct condition prior to flight.
IN FLIGHT
1. Airspeed - REDUCE.
2. Passenger Advisory Light - PASS SAFETY.
3. Cabin Door - KEEP CLEAR.
4. Descend to a lower altitude.
5. LAND AS SOON AS PRACTICAL.