Airworthiness Directives; AlliedSignal, Inc. Model T5317A-1 Turboshaft Engines

This document publishes in the Federal Register an amendment adopting Airworthiness Directive (AD) 98-22-11 that was sent previously to all known U.S. owners and operators of AlliedSignal, Inc. (formerly Textron Lycoming) model T5317A-1 turboshaft engines by individual letters. This AD requires, prior to further flight, a pressure test to determine if both fuel pumps in the regulator, Part Number (PN) 1-170- 240-93, are producing fuel pressure, and, if necessary, replacement of the fuel regulator with serviceable part. In addition, this AD requires repetitive engine fuel pump pressure tests. This amendment is prompted by a report of an accident involving an AlliedSignal, Inc. (formerly Textron Lycoming) model T5317A-1 turboshaft engine installed on a Kaman Aerospace model K-1200 rotorcraft engaged in logging operations. The actions specified by this AD are intended to prevent loss of fuel flow from the engine fuel regulator due to failure of both primary and secondary fuel pump drive shaft splines. This condition, if not corrected, could result in engine failure and forced autorotation landing.