1. A maintenance system for a fleet of aircraft, the system comprising: a maintenance database comprising at least one maintenance schedule comprising a list of routine maintenance actions for the aircraft; a non-routine maintenance database comprising at least non-routine maintenance historical data for the aircraft; a health database comprising operation data for the aircraft; and a planning module configured to query the maintenance database, non-routine maintenance database, and the health database, such that the planning module is configured to identify anticipated non-routine maintenance tasks having a threshold probability of occurrence based on historical data for the fleet and aircraft health data and having a correlation with at least one of the routine maintenance actions, wherein the correlation includes that the anticipated non-routine maintenance tasks and the at least one of the routine maintenance actions are located in a same area of the aircraft, and the correlation is based on the timing and duration of the routine maintenance action in relation to an amount of the threshold probability of the occurrence of the identified anticipated non-routine maintenance tasks; and a generation module configured to generate a task schedule that is a combination of the maintenance schedule and at least one of the identified anticipated non-routine maintenance tasks having the threshold probability of occurring, wherein the generation module generates the task schedule prior to initiating a maintenance action.