AD NUMBER: 2016-16-12

PRODUCT: Certain Continental Motors, Inc., (CMI) San Antonio (formerly known as Airmotive Engineering Corp. (AEC)), replacement parts manufacturer approval (PMA) cylinder assemblies marketed by Engine Components International Division (ECi).

ACTION: Final Rule

SUMMARY: On July 17, 2015, AEC was purchased by CMI and is now operating as "Continental Motors–San Antonio." These cylinder assemblies are used on all CMI model -520 and -550 reciprocating engines, and on all other CMI engine models approved for the use of model -520 and -550 cylinder assemblies, such as the CMI model -470 when modified by supplemental type certificate (STC).

This AD was prompted by reports of multiple cylinder head-to-barrel separations and cracked and leaking aluminum cylinder heads.

This AD requires removal of the affected cylinder assemblies, including overhauled cylinder assemblies, according to a phased removal schedule.

The FAA is issuing this AD to prevent failure of the cylinder assemblies, which could lead to failure of the engine, in-flight shutdown, and loss of control of the airplane.

DATES: This AD is effective September 15, 2016.

(Editors note: Continental Motors has issued a statement indicating it did not manufacture the cylinders cited in this AD)

FMI: AD