Device and System Reliability

In plain language

Any onboard systems or devices required for safe flight must operate effectively and dependably.

Requirement as structured

If there are devices necessary to safely perform expected operations, such devices must function effectively and reliably.

Original regulatory text

予想される運用を安全に行うために必要な機器がある場合には、当該機器は有効かつ確実にその機能を発揮することができるものであること。