Responsibility for dispatch release: Domestic and flag operations

For domestic and flag operations under Part 121, the airline must prepare a dispatch release for each flight. This document is based on information from an authorized aircraft dispatcher and requires two signatures: the pilot in command and the dispatcher. Both must sign only if they genuinely believe the flight can be conducted safely.

This creates a shared responsibility system—neither person alone can authorize the flight. The dispatcher analyzes weather, fuel requirements, routing, and operational factors, while the captain brings operational judgment about the aircraft and crew readiness.

The regulation allows the dispatcher to delegate the authority to *sign* a specific release (perhaps to another qualified dispatcher), but cannot delegate the overall authority to dispatch flights. This means the dispatcher remains accountable for the dispatch function even when someone else physically signs the paperwork. This dual-signature requirement is a key safety feature distinguishing Part 121 operations from smaller commercial operations.

*This is a plain-English summary for study only. The official 14 CFR text on this page is controlling — always read the current regulation and consult a CFI.*