This notification is an important update to the Continental Mandatory Service Bulletin (MSB23-01A) and relevant for certain engines manufactured June 1, 2021, through February 7, 2023.The FAA today (February 23, 2023) released an Airworthiness Directive (AD) related to the Continental Engine Mandatory Service Bulletin (MSB23-01A).

Please be aware that this FAA AD takes precedence over the Continental Mandatory Service Bulletin (MSB23-01A) is now the governing document and rule for this issue.Below is a summary of the differences between the FAA AD and the previously issued Continental Mandatory Service Bulletin (MSB23-01A):

*The FAA AD inspection requirements apply to all engines referenced in MSB23-01A regardless of the operating hours on the engine.The Continental Mandatory Service Bulletin excluded affected engines that had 200 or more operating hours (Hobbs).

*The FAA AD must be completed prior to the next flight and does not provide a flight time allowance that can be used to reposition the aircraft to a maintenance facility.The Continental Mandatory Service Bulletin allowed five (5) hours to reposition the aircraft for compliance.*Note the FAA AD does allow for the issuance of a Special Flight Permit to reposition the aircraft to a maintenance facility.

*A Special Flight Permit is issued by the FAA Flight Standard District Office.
One of the following actions must be performed to obtain a Special Flight Permit for an engine affected by this issue:

*The engine oil filter pleats or screen are inspected and there is no evidence of metal contamination; orAn oil change has been completed within the previous five (5) flight hours and there was no evidence of metal contamination in the oil filter pleats or screen.

*If your engine is affected, we recommend that you contact your Authorized Service Center (ASC) as soon as possible to make arrangements to comply with the FAA AD.

As a reminder, every owner and pilot is required to comply with the federally mandated FAA AD.