EASA SIB NE-13-21
Goodrich — P/N 3E1150-10 and P/N 3E1150-12 Propeller De-Ice Timer Failures
Summary
The FAA Special Airworthiness Information Bulletin NE-13-21 addresses failures in Goodrich Corporation propeller de-ice timers, part numbers 3E1150-10 and 3E1150-12, which are installed on various propeller-driven aircraft with Goodrich electrical propeller de-ice systems. The bulletin informs owners and operators about the risk of loss of propeller ice protection due to circuit board corrosion in these timers. This information bulletin is advisory and does not mandate regulatory action under 14 CFR part 39.
What Changed
This bulletin introduces awareness of a potential failure mode in Goodrich propeller de-ice timers caused by circuit board corrosion, which can result in the de-ice boots being stuck on or off. It highlights the operational risks and recommends compliance with Goodrich Service Bulletin 3E1150-30-01, Revision 1, dated November 28, 2012, to mitigate these failures. No new regulatory requirements or airworthiness directives are issued.
Why It Matters
The failure of these de-ice timers can lead to loss of propeller ice protection, causing ice accumulation that reduces aircraft thrust and performance. For operators and maintenance personnel, understanding this risk is critical to ensuring flight safety, especially when operating in known icing conditions. Early detection and compliance with the recommended service bulletin help prevent in-flight performance degradation and potential damage to propeller de-ice boots.
What To Do
Operators should avoid flying into known icing conditions until all propellers comply with Goodrich Service Bulletin 3E1150-30-01, Revision 1. It is recommended to complete this compliance within three years from the publication of this bulletin. Maintenance teams should inspect and address any circuit board corrosion in the affected de-ice timers to maintain propeller ice protection functionality.