Methods and apparatus for material modification using laser bursts including appropriately timed laser pulses to enhance material modification. The jacket includes a sound absorbing material such as fibrous thermal insulation and an acoustic permeable covering between the acoustic reflective surface and the engine compartment of the machine. The backrest is attached to and disposed between the backrest support assemblies. A horizontal member is attached to the handle by a fastener and acts to house a clamp member, which includes teeth at its second end. The first connector and the second connector are routed along the routing guide to the adapter and optically joined to connect the optical fiber of the feeder cable and the optical fiber of the distribution cable. The wireless sensing system is integrated with at least one of the first and second aircraft rotary wing motion control fluid device bodies.