Summary
The FAA proposes to supersede Airworthiness Directive (AD) 2017-23-06, which applies to certain General Electric Company (GE) CF34-8C1, CF34-8C5, CF34-8C5A1, and CF34-8C5B1 engines. AD 2017-23-06 requires an inspection of the bleed air manifold link rod assemblies and the supply, return, and drain fuel fittings on the operability bleed valve (OBV). Since the FAA issued AD 2017-23-06, the manufacturer developed improved inspection techniques and determined these inspections should be applied to additional engine models. This proposed AD would require repetitive inspections of the OBV fuel tubes, OBV bleed air manifold link rod assemblies, and the OBV fuel fittings and replacement of OBVs or related hardware that fail inspection. The FAA is proposing this AD to address the unsafe condition on these products.