Robinson R44 — Service Bulletins

This document is a Safety Alert for Operators (SAFO) issued by the Federal Aviation Administration (FAA) regarding safety concerns related to the hydraulic flight control system of the Robinson R44 helicopters. It highlights a specific accident that occurred on February 4, 2011, which resulted in two fatalities due to a failure in the hydraulic system. The SAFO aims to inform operators and maintainers about the potential risks and encourages them to inspect the hydraulic flight control system to ensure safety and compliance with manufacturer guidelines. The document serves as a crucial reminder of the importance of regular maintenance and adherence to safety protocols in aviation operations.

• Inspect the hydraulic flight control system on Robinson R44 helicopters regularly.
• Ensure correct installation of self-locking nuts and attaching fittings in the hydraulic system.
• Review manufacturer service bulletins related to the hydraulic flight control system.