Special Conditions: General Electric Aircraft Engines Models CT7-6D, CT7-6E and CT7-8 Turboshaft Engines.

These special conditions are issued for the General Electric Aircraft Engines (GEAE) Models CT7-6D, CT7-6E and CT7-8 turboshaft engines. These engines will have 30-second one-engine-inoperative (OEI) and 2-minute OEI ratings. The applicable airworthiness standards do not contain appropriate safety standards for engine overspeed test requirements for these engine ratings. This document contains the additional safety standards for the overspeed test for these ratings under Sec. 33.27 that the Administrator considers necessary to establish a level of safety equivalent to that established by the existing airworthiness standards. This document also specifies the mandatory post-flight engine inspection and maintenance requirements for these ratings in accordance with Sec. 33.4.