AD NUMBER: 2006-11-16
MANUFACTURER: Honeywell
SUBJECT: Airworthiness Directive 2006-11-16
SUMMARY: The FAA is superseding an existing airworthiness directive (AD) for Allied Signal, Inc. T5317A-1 turboshaft engines. That AD currently requires repetitive engine fuel pump pressure tests of certain fuel control regulator assemblies to determine if both fuel pumps in the fuel control regulator assemblies are producing fuel pressure. That AD also requires replacing the fuel controlregulator assembly, if necessary. This AD requires initial and repetitive visual and dimensional inspections of fuel control regulator assembly main and secondary drive shaft and pump gear splines, installed in certain fuel control regulator assemblies. This AD also expands the engine applicability, and includes certain engines installed on helicopters certified under § 21.25 or 21.27 of the Code of Federal Regulations (14 CFR 21.25 or 14 CFR 21.27). This AD results from several reports of loss of fuel flow from the engine fuel control regulator assembly due to failure of both main and secondary drive shaft and pump gear splines. We are issuing this AD to preventin-flight engine failure and forced autorotation landing.

FMI: www.faa.gov/regulations_policies/airworthiness_directives/