we have an old machine in production area , and we lost the qualification documents , what we have to do for qualification of document and what type of qualification ??
From that requalification and validation is required, but calibration and maintenance history keep for justification,
Log a deviation first then go for re qualifications and keep calibration documents for reference which will be helpful to justify usages of machine not without qualifications before re qualifications.
Raised the deviation of document missing initiate CAPA and perform risk assessment.
and perform Requalification.