Post Flight Analysis Based on QAR in FOQA Program for Jet Transport Aircraft Part I: Angular Position Monitoring of Flight Control Surface

The objective of this paper is to present an evaluating method for irregular deviations of flight control surface deflected angles based on flight data through the post flight analysis. The flight datasets are extracted from quick access recorder (QAR) available in the Flight Operations Quality Assurance (FOQA) program. The lift-to-drag (L/D) model for an aging twin-jet transport will be established through the fuzzy-logic modeling (FLM). The irregular deviations of flight control surfaces can be examined by the L/D model-predicted results through sensitivity analysis. If the irregular deviations of flight control surfaces are not rigged before the flight, the flight control system may not work properly and it may have flight safety concerns in flight. The present concept is an innovation to improve the flight data analysis to monitor the irregular deviations of flight control surface in the present program of FOQA and to increase operational efficiency for the aircraft carriers.