EASA SIB NE-18-27: Continental Motors Inc. (incl. RR Continental) Engines - Rocker Shaft Boss Inspection

What to do

Operators and maintenance organizations should review the requirements of AD 94-05-05 R1 carefully and apply them to all affected Teledyne Continental Motors and Rolls-Royce plc engines listed, regardless of cylinder modifications or part numbers. If modifications affect compliance, stakeholders should request FAA approval for alternate methods of compliance. No new compliance deadlines are introduced by this bulletin.

Summary

The Continental Motors Inc. (incl. RR Continental) Engines - Rocker Shaft Boss Inspection is a Special Airworthiness Information Bulletin (SAIB NE-18-27) issued by the FAA. It addresses confusion regarding the applicability of Airworthiness Directive 94-05-05 R1 for Teledyne Continental Motors and Rolls-Royce plc reciprocating engines installed on various light aircraft models. The bulletin clarifies that the inspection requirements apply to all listed engine models regardless of cylinder manufacturer or modifications.

What changed

This SAIB clarifies previous FAA guidance that was inconsistent with the applicability requirements of AD 94-05-05 R1. It corrects misunderstandings that certain engines with specific cylinder installations were exempt from the AD's inspection requirements. The bulletin reiterates that all engines listed in the AD must comply with its inspection instructions regardless of cylinder type or modifications.

Why it matters

This clarification is important for operators, maintenance personnel, and repair stations to ensure compliance with AD 94-05-05 R1 and maintain engine airworthiness. Misinterpretation of the AD could lead to missed inspections of rocker shaft bosses, potentially compromising engine safety. Accurate understanding helps avoid regulatory non-compliance and supports continued safe operation of affected aircraft.