Airworthiness directives › 2020-16-11
AD 2020-16-11 Airworthiness Directives; Continental Aerospace Technologies, Inc. (Type Certificate Previously Held by Continental Motors, Inc.) Reciprocating Engines
Makes named: continental. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to Continental Aerospace Technologies, Inc. (Type Certificate previously held by Continental Motors, 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, originally manufactured, rebuilt, or modified with a cross-flow cylinder assembly replacement, on or after November 1, 2014, and with a cross-flow cylinder assembly, part number (P/N) 658538, 658540, 658542, 658591, 658595, 658613, 658624, 658539, 658541, 658590, 658594, 658603, 658623, or 658630, installed.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
(1) 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 inspection or next scheduled annual inspection after the effective date of this AD, whichever is applicable based on the type of aircraft operation, perform a visual inspection of the cross-flow cylinder assembly using 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”). (i) 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 using paragraphs III.4 through III.8, Action Required, of Continental Aerospace Technologies MSB 18-08B; or (ii) If a fissure, crack or physical damage is identified, remove the cross-flow cylinder assembly and replace with a part eligible for installation. (2) 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 using paragraphs III.1 through III.3, Action Required, of Continental Aerospace Technologies MSB18-08B. (i) 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 using paragraphs III.4 through III.8, Action Required, of Continental Aerospace Technologies MSB 18-08B; or (ii) If a fissure, crack or physical damage is identified, remove the cross-flow cylinder assembly and replace with a part eligible for installation.
Unsafe condition
This AD was prompted by reports of in-flight engine failures due to fractured cross-flow cylinder assemblies. The FAA is issuing this AD to prevent failure of the engine. The unsafe condition, if not addressed, could result in failure of the engine, in-flight shutdown, and forced landing.
Affected ADs
None.
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