Aviation glossary · Continuing airworthinessWhat is MPD?
Maintenance Planning Document
The manufacturer's document listing recommended scheduled maintenance tasks and intervals for a type — the basis from which an operator builds its own approved programme.
Why it matters
The planning document is the reference an auditor returns to. Divergence between it and the live programme is normal and permitted; undocumented divergence is not.
In AerSynx
The gap between the planning document and the approved programme is computed rather than reviewed by hand, and each difference carries its justification. LDND and MPD Management →