1.1 ApplicationThis standard defines the common nonconformance data definition and documentation that must be exchanged between an internal or external supplier or sub-tier supplier and the customer when informing about a nonconformity requiring formal decision. The requirements are applicable - partly or totally - when reporting a product nonconformity to the owner or operator as user of the end item (e.g. engine, aircraft, spacecraft, helicopter etc.), if specified by contract.Reporting of nonconformance data, either electronically or conventionally on paper, is subject to the terms and conditions of the contract. This also includes, where applicable, dat