New AD Proposal for Continental Engines
The FAA proposes to adopt a new airworthiness directive (AD) for all Continental Aerospace Technologies, Inc. model GTSIO-520-C, GTSIO-520-D, GTSIO-520-H, GTSIO-520-K, GTSIO-520-L, GTSIO-520-M, GTSIO-520-N, IO-550-G, IO-550-N, IO-550-P, IO-550-R, IOF-550-N, IOF-550-P, IOF-550-R, TSIO-520-BE, TSIO-550-A, TSIO-550-B, TSIO-550-C, TSIO-550-E, TSIO-550-G, TSIO-550-K, TSIO-550-N, TSIOF-550-D, TSIOF-550-J, TSIOF-550-K, and TSIOF-550-P reciprocating aviation gasoline (AvGas) engines with a certain cross-flow cylinder assembly installed.
This proposed AD was prompted by reports of in-flight engine failures due to fractured cross-flow cylinder assemblies. This proposed AD would require visual inspection and, depending on the results of the inspection, modification or replacement of the cross-flow cylinder assembly. The FAA is proposing this AD to address the unsafe condition on these products.
Required Actions
If the engine has fewer than 500 engine operating hours on the effective date of this AD, no later than the next scheduled 100-hour/annual inspection after the effective date of this AD, perform a visual inspection of the cross-flow cylinder assembly in accordance with paragraphs III.1 through III.3, Action Required, of Continental Aerospace Technologies, Inc. Mandatory Service Bulletin (MSB) 18-08, Revision B, dated January 13, 2020 (“Continental Aerospace Technologies MSB18-08B”).
If the radius corner angle of the cross-flow cylinder assembly shows casting flash build-up or a sharp radius edge, modify the cross-flow cylinder assembly in accordance with paragraphs III.4 through III.8, Action Required, of Continental Aerospace Technologies MSB 18-08B; or
If a fissure, crack or physical damage is identified, remove the cross-flow cylinder assembly and replace with a part eligible for installation.
If the engine has 500 engine operating hours or greater on the effective date of this AD, at the next maintenance event after the effective date of this AD, not to exceed 50 engine operating hours after the effective date of this AD, perform a visual inspection of the cross-flow cylinder assembly in accordance with paragraphs III.1 through III.3, Action Required, of Continental Aerospace Technologies MSB18-08B.
If the radius corner angle of the cross-flow cylinder assembly shows casting flash build-up or a sharp radius edge, modify the cross-flow cylinder assembly in accordance with paragraphs III.4 through III.8, Action Required, of Continental Aerospace Technologies MSB 18-08B; or
If a fissure, crack or physical damage is identified, remove the cross-flow cylinder assembly and replace with a part eligible for installation.
More Information
For more information about this AD, contact Boyce Jones, Aerospace Engineer, Atlanta ACO Branch, FAA, 1701 Columbia Avenue, College Park, Georgia 30337; phone: 404-474-5535; fax: 404-474-5606; email: boyce.jones@faa.gov.
For service information identified in this AD, contact Continental Aerospace Technologies, Inc., 2039 South Broad Street, Mobile, Alabama, 36615, United States; phone: 251-436-8299; website: http://www.continentalmotors.aero. You may view this referenced service information at the FAA, Engine and Propeller Standards Branch, 1200 District Avenue, Burlington, MA, 01803. For information on the availability of this material at the FAA, call 781-238-7759.
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