Helicopter
Flight Crew Commercial; Flight Crew Instrument
Flight Crew Last 90 Days 51; Flight Crew Total 2027; Flight Crew Type 54.6
Human-Machine Interface
Conflict NMAC; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Took Evasive Action
Aircraft; Human Factors
On the morning of [Date]; a [helicopter] that was conducting a power line patrol for [company] incurred a mid-air near miss with an Agriculture Aircraft. It is unknown what the crop duster mission was but comments from crew are that it appeared to be flying enroute along the same power line as the [helicopter] crew and not engaged with any spraying operations. When the aircraft was observed; the crew made an abrupt flight control input to avoid contact and then returned to base once clear of traffic.It should be noted that the TCAS on [the helicopter] was installed and operational but did not go off so we suspect the air tractor had no transponder or if equipped; it was not turned on.
Reporter stated that while conducting a power line patrol; a helicopter had a near midair collision with an agricultural aircraft that was not observed on the TCAS unit in the helicopter.