Robinson R44 — Maintenance Manual

This document is a Continuing Airworthiness Notice (CAN) issued by the Civil Aviation Authority of New Zealand, specifically addressing maintenance requirements for the Robinson R44 II helicopters equipped with a Lycoming IO-540 engine. It serves to inform operators and maintainers about the revised component maintenance requirements, particularly concerning the electric fuel pump and fuel pressure relief valve (PRV). The notice emphasizes the importance of adhering to the manufacturer's recommended replacement intervals for these components to ensure safety and reliability in operations. The document also provides guidance on reporting any anomalies related to the fuel systems of the R44 helicopters.

• Electric Fuel Pump (P/N D743-1, -2, -3, -4) must be replaced at 2200 hours TTIS.
• Fuel Pressure Relief Valve (P/N D321-1) must be replaced at 12 years or before 2200 hours TTIS.
• Operators should assess their maintenance records for compliance with the latest RHC R44 Maintenance Manual.
• Failure of the PRV combined with a failed electric fuel pump could lead to loss of engine performance.
• Operators are encouraged to report any fuel system anomalies to the CAA.