Fuel - Robinson Helicopter Company Hot Weather Operation
- Published
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of Robinson R44 II helicopters should monitor for intermittent or flickering auxiliary fuel pump warning lights as a sign of fuel vapor formation. If vapor is suspected, they should reduce altitude or suspend flight operations until ambient temperatures decrease. No mandatory compliance deadline is specified, but caution is advised during hot weather operations.
Summary
The Special Airworthiness Information Bulletin SAIB SW-09-36 is an FAA informational bulletin addressing fuel vapor issues during hot weather operations in Robinson Helicopter Company Model R44 II helicopters. It alerts operators to the potential for fuel vapor formation at high ambient temperatures and altitudes, which can cause engine power loss. The bulletin provides guidance based on factory testing and operational experience.
What changed
SAIB SW-09-36 introduces awareness of fuel vapor formation risks in Robinson R44 II helicopters operating in hot weather conditions. It clarifies that while initial recommendations limited operations to below 105 ºF, subsequent testing supports safe fuel system operation up to 115 ºF ambient temperature. The bulletin highlights the auxiliary fuel pump warning light as an early indicator of vapor formation.
Why it matters
This bulletin is important for aviation professionals because fuel vapor formation can lead to unexplained engine power loss, posing safety risks during flight. Operators and maintenance personnel need to recognize early warning signs to prevent in-flight power issues. Understanding these conditions helps ensure safe operation and reduces the risk of incidents related to fuel system vapor in hot weather.
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