Plan a CS-LSA to MOSAIC transition

The decision behind this topic

For CS-LSA manufacturers, the useful question is not simply what MOSAIC says. The work is converting a familiar compliance package into the new U.S. structure. The management decision is how much existing substantiation can support the target aircraft and what must be rebuilt. That requires an aircraft-specific record, not a generic interpretation copied into a schedule.

A credible program distinguishes confirmed requirements from assumptions, ties each conclusion to the configuration it covers, and gives unresolved items an owner and a decision date. This is especially important when prior certification work, supplier evidence, or commercial forecasts are being reused in a new U.S. context.

Evidence to put on the table

A practical way to proceed

1. 1

   create a crosswalk rather than relabeling the old package

2. 2

   validate evidence applicability to the target configuration

3. 3

   prioritize gaps that drive test, supplier, or tooling lead time

The output should be a traceable recommendation with conditions, not an unsupported yes or no. Where evidence is incomplete, show the closure method, cost and schedule exposure, and the event that will change the decision.