EASA SIB BEA-2019-02: Embraer EMB-135 and EMB-145 Aeroplanes - Electrical Wiring Terminations

What to do

Owners and operators of affected Embraer EMB-135 and EMB-145 aircraft should perform the detailed inspection outlined in MRBR Task 20-00-00-220-014-A00 to check wiring terminations at the Pitot and TAT relay receptacles for damage, chafing, and proper installation. Any discrepancies found during inspections should be reported to Embraer via a Service Difficulties Report (SDR). There are no mandatory compliance deadlines as this bulletin is informative and not an Airworthiness Directive.

Summary

The Embraer EMB-135 and EMB-145 Aeroplanes - Electrical Wiring Terminations Special Airworthiness Bulletin (BEA Nº 2019-02) advises owners and operators of Embraer EMB-135 and EMB-145 series aircraft about inspecting electrical wiring terminations at the receptacles of Pitot #1, Pitot #2, Pitot #3, TAT #1, and TAT #2 relays. This bulletin is informative and applies to multiple EMB-135 and EMB-145 variants, including EMB-145ER, EMB-145EU, EMB-145EP, EMB-145LR, EMB-145MR, EMB-145LU, EMB-135ER, EMB-135BJ, EMB-135LR, EMB-145MP, EMB-145MK, EMB-135KE, EMB-135KL, and EMB-145XR airplanes.

What changed

This bulletin revises the previous BEA 2017-03 by recommending a new detailed inspection task (MRBR Task 20-00-00-220-014-A00) focused on electrical wiring terminations at the specified relay receptacles. It highlights ongoing concerns about bad contacts and heat damage observed in service, particularly at the Pitot #3 relay wiring terminations. The bulletin does not introduce mandatory requirements but updates inspection guidance to enhance detection of wiring issues.

Why it matters

This bulletin is important for aviation professionals because it addresses potential electrical wiring degradation that could lead to bad contacts or smoke in the flight deck, impacting flight safety. Operators and maintenance teams need to be aware of these inspection recommendations to prevent in-service failures and ensure continued airworthiness. Compliance teams should monitor these recommendations to maintain regulatory awareness and support proactive maintenance.