EASA SIB NE-16-15: General Electric CF6-80E1 Engines — Horizontal Drive Shaft Rework / Replacement

What to do

Affected operators and maintenance facilities should review and implement the procedures outlined in GE Service Bulletin CF6-80E1 S/B 72-0532 to rework or replace the horizontal drive shaft as recommended. Although compliance is not mandatory, following these recommendations can prevent starter failures and related safety hazards. For further technical information, stakeholders may contact the FAA Aerospace Engineer or GE Aviation support as provided.

Summary

The Special Airworthiness Information Bulletin SAIB: NE-16-15 is an FAA informational bulletin addressing potential starter failures in General Electric CF6-80E1 turbofan engines, specifically models -80E1A1, -80E1A2, -80E1A3, -80E1A4, and -80E1A4/B. It informs owners, operators, and repair facilities about issues related to the horizontal drive shaft length that can cause starter bearing failures and low-grade fires. The bulletin provides guidance on rework or replacement procedures to mitigate these risks.

What changed

SAIB NE-16-15 introduces information about the cause of six reported engine starter failures linked to excessive horizontal drive shaft length in GE CF6-80E1 engines. It references GE Service Bulletin CF6-80E1 S/B 72-0532, dated February 10, 2016, which details the rework or replacement of the horizontal drive shaft to prevent further failures. This bulletin does not mandate regulatory action but recommends compliance with the service bulletin procedures.

Why it matters

This bulletin is important for aviation professionals because it highlights a potential reliability and safety issue with the engine starter system that could lead to bearing failure, oil leaks, and low-grade fires. Operators and maintenance organizations need to be aware of this to prevent unscheduled engine downtime and ensure continued airworthiness. Understanding and addressing this issue helps maintain engine performance and safety without the need for an airworthiness directive.