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Continental Issues Service Bulletin For Multiple Engines

Covers Inspection And Maintenance Modification Of Cylinder Assemblies

Continental Aerospace Technologies has issued a service bulletin that applies to New and rebuilt Continental Aerospace Technologies GTSIO-520-C, D, H, K, L, M, N; IO-550-G, N, P, R; IOF-550-N, P, R; TSIO-520-BE; TSIO-550-A, B, C, E, G, K, N and TSIOF-550-D, J, K, P aviation gasoline (AvGas) engines originally manufactured, rebuilt, or modified with a cross-flow cylinder replacement on or after November 1, 2014.

Several field reports indicate the potential for fracture initiation on engines (exceeding 500 hours of operation) at the radius edge of identified cylinder heads produced on or after November 1, 2014. The affected cylinder casting can be identified by the “filled” top fin flange area above the exhaust port.

According to the document, affected cylinder head castings have a distinguishing feature from unaffected. Affected new and rebuilt engines with serial number 1036883 and later were inspected and corrected at the factory to comply with this Service Document. Additionally, all cylinder heads stamped with the letter “S” (regardless of serial number) meet full compliance and do not require additional inspection.

New or rebuilt engines obtained prior to November 1, 2014 are not affected by the Service Document. Additionally, cylinder assemblies obtained prior to November 1, 2014 or stamped with serial number AC18KB277 or later are not affected.

The document outlines the procedures for affected cylinders. The actions required to comply with this Service Document are covered, up to the Eligible Allowance provided for reimbursement. Standard warranty practices apply. Visit the Continental web site at to obtain copies of Continental Warranty Policies.

(Image from cited service document)

FMI: Full Service Document


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