What was found
AIRCRAFT IN CRUISE FLIGHT, ALTITUDE FL410, CREW FELT A PRESSURIZATION "BUMP", NOTICED 2000 FEET PER MINUTE CABIN CLIMB INDICATION, AND EMERGENCY PRESSURIZATION AMBER ANNUNCIATOR WARNING LIGHT. FOLLOWING STANDARD PROCEDURES - CREW DECLARED AN EMERGENCY, INITIATED DESCENT INTO MONTGOMERY, AL (MGM) WITHOUT FURTHER INCIDENT. ALL REGULATORY AND CHECKLIST PROCEDURES WERE FOLLOWED.