EASA SIB NE-14-14: Sikorsky S-92A Helicopters — Powerplant Salt Encrustation

What to do

Pilots operating Sikorsky S-92A helicopters in heavy salt spray environments should closely monitor turbine gas temperature against engine torque for abrupt increases indicating salt buildup. If such changes occur, pilots should prioritize exiting the salt spray area and consider flying through precipitation to help clear salt deposits. Operators should await the updated flight manual supplement expected in the fourth quarter of 2014 for formal guidance.

Summary

The Special Airworthiness Information Bulletin SAIB: NE-14-14 is an FAA informational bulletin addressing the potential for salt encrustation and engine performance degradation in Sikorsky S-92A helicopters operating in heavy salt spray environments. It highlights concerns related to the powerplant when conducting over water search and rescue operations. The bulletin informs operators and maintenance personnel about monitoring engine parameters to detect possible salt-related issues.

What changed

This bulletin introduces awareness of salt encrustation risks affecting the Sikorsky S-92A helicopter's engines during low altitude, low speed operations in heavy salt spray conditions. It notes that the current flight manual supplement lacks this caution but that a general revision including this information is planned for late 2014. The bulletin does not mandate regulatory action but provides operational guidance.

Why it matters

Understanding the risk of salt encrustation is important for operators and maintenance teams to prevent engine performance degradation or compressor stalls during search and rescue missions over saltwater. Early detection through monitoring turbine gas temperature relative to engine torque can enhance flight safety and reduce maintenance issues. This information helps ensure continued airworthiness and operational reliability in harsh maritime environments.

What to do

Summary

What changed

Why it matters

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