Before revision: S4000P - International specification for developing and continuously improving preventive maintenance is a specification developed jointly by a multinational team from the Aerospace and Defence Industries Association of Europe (ASD) and Aerospace Industries Association (AIA).S-Series ILS specifications S4000P is part of the S-Series of ILS specifications .
After revision: and is integrated in the global ILS process defined by SX000i - International guide for the use of the S-Series of Integrated Logistics Support (ILS) specificationsS4000P - International specification for developing and continuously improving preventive maintenance is a specification developed jointly by a multinational team from the Aerospace and Defence Industries Association of Europe (ASD) and Aerospace Industries Association (AIA).S-Series ILS specifications S4000P is part of the S-Series of ILS specifications .