A system for trend monitoring in an aircraft to predict a cockpit level event, the system comprising: a memory device; a display device; a source of critical parameters providing cockpit-level event information for a cockpit-level event from among the following cockpit-level events: a change in a vertical navigation mode VNAV, a drop in a lateral navigation mode LNAV, an autopilot disengagement, an infringement of a required navigation performance corridor, a lateral path deviation, and a vertical path deviation; and a processor coupled to the memory device, the source of critical parameters, and the display device, the processor configured to: initialize, for a critical parameter among the critical parameters, a first threshold t1, and a first alert table a1, wherein a1 comprises, for t1, a list of probable causes associated with exceedance of t1, a respective list of corrective actions, and a communication protocol for the display device; receive, at a first time, a valid first actual data and a valid first predicted data for the critical parameter; determine a first current deviation defined as a difference between the first valid actual data and the first valid predicted data; assert a flag upon determining that first current deviation exceeds t1; determine whether the asserted flag should be analyzed in conjunction with other critical parameters to support a cockpit-level event alert; determine a content and format for an the cockpit-level event alert based on the asserted flag and the critical parameter; identify a probable cause and corrective action associated with the cockpit-level event alert in response to referencing a1; and command the display device to render the alert, probable cause, and the corrective action, in accordance with a1. a memory device; a display device; a source of critical parameters providing cockpit-level event information for a cockpit-level event from among the following cockpit-level events: a change in a vertical navigation mode VNAV, a drop in a lateral navigation mode LNAV, an autopilot disengagement, an infringement of a required navigation performance corridor, a lateral path deviation, and a vertical path deviation; and a processor coupled to the memory device, the source of critical parameters, and the display device, the processor configured to: initialize, for a critical parameter among the critical parameters, a first threshold t1, and a first alert table a1, wherein a1 comprises, for t1, a list of probable causes associated with exceedance of t1, a respective list of corrective actions, and a communication protocol for the display device; receive, at a first time, a valid first actual data and a valid first predicted data for the critical parameter; determine a first current deviation defined as a difference between the first valid actual data and the first valid predicted data; assert a flag upon determining that first current deviation exceeds t1; determine whether the asserted flag should be analyzed in conjunction with other critical parameters to support a cockpit-level event alert; determine a content and format for an the cockpit-level event alert based on the asserted flag and the critical parameter; identify a probable cause and corrective action associated with the cockpit-level event alert in response to referencing a1; and command the display device to render the alert, probable cause, and the corrective action, in accordance with a1. initialize, for a critical parameter among the critical parameters, a first threshold t1, and a first alert table a1, wherein a1 comprises, for t1, a list of probable causes associated with exceedance of t1, a respective list of corrective actions, and a communication protocol for the display device; receive, at a first time, a valid first actual data and a valid first predicted data for the critical parameter; determine a first current deviation defined as a difference between the first valid actual data and the first valid predicted data; assert a flag upon determining that first current deviation exceeds t1; determine whether the asserted flag should be analyzed in conjunction with other critical parameters to support a cockpit-level event alert; determine a content and format for an the cockpit-level event alert based on the asserted flag and the critical parameter; identify a probable cause and corrective action associated with the cockpit-level event alert in response to referencing a1; and command the display device to render the alert, probable cause, and the corrective action, in accordance with a1. receive, at a first time, a valid first actual data and a valid first predicted data for the critical parameter; determine a first current deviation defined as a difference between the first valid actual data and the first valid predicted data; assert a flag upon determining that first current deviation exceeds t1; determine whether the asserted flag should be analyzed in conjunction with other critical parameters to support a cockpit-level event alert; determine a content and format for an the cockpit-level event alert based on the asserted flag and the critical parameter; identify a probable cause and corrective action associated with the cockpit-level event alert in response to referencing a1; and command the display device to render the alert, probable cause, and the corrective action, in accordance with a1.