Airworthiness Directives; Fairchild Aircraft, Inc., SA226 Series and SA227 Series

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This document proposes to adopt a new airworthiness directive (AD) that would apply to all Fairchild Aircraft, Inc. (Fairchild Aircraft) SA226 and SA227 series airplanes. This proposed AD would require you to inspect the fuel boost pump wiring for any chafing, cracked insulation material, or evidence of bare wire(s) (referred to herein as damage), and replace any damaged wiring. This proposed AD would also require you to install a protective tubing around the fuel boost pump wiring harness. This proposed AD is the result of reports of chafed fuel boost pump wiring to either the inboard or outboard boost pump wiring. The actions specified by this proposed AD are intended to prevent the fuel boost pump wiring from chafing, which could result in electrical arcing. This could serve as an ignition source inside the fuel tank and result in fire or explosion.